iDock C10 dual monitors disconnect intermittently

Ciabatta · May 5, 2025, 7:23am

Hi!

I hope you are well.

Please see my issue below:
On both Windows and Linux I am experiencing the intermittent connection. It appears as if it might only be my screens that disconnect and then connect again, it does seem that the indicator lights on the iDock C10 does not flicker when this happens.
I have now also experienced this disconnection on my Macbook Pro, on the Macbook Pro it disconnects and just does not reconnect again…
Note: This happens even when the iDock is at a cool temperature and not running hot at all…
Macbook Pro is in clamshell mode, and when switching over to it, the screen is duplicated (for now this is fine, I just want to fix the flickering…)

Hardware Details:
KVM Switch: iDock C10 - S/N: A24L0609 (Ordered - January 31, 2025 : amazon.com)

PC:
OS: Dualboot PopOS (Linux) & Windows 11
CPU: Intel Core i7-9700 (3.0GHz, 12MB Cache, 8x Cores, 4.7GHz Turbo)
Motherboard: MSI MPG Z390 GAMING Pro Carbon AC LGA 1151 Intel Motherboard
GPU: GeForce GTX 1650 Super OC Edition. 4GB GDDR6 Card
Case: Cougar Turret RGB Tempered Glass Gaming Case
Power Supply: Antec HCG-750 80+ GOLD Gaming Modular PSU
RAM: Corsair Vengeance LPX 64GB (4x 16GB) 3200MHz C16 Memory
Monitor 1: Samsung SF350 24" FHD Thin Bezel Monitor (60Hz) 1920x1080
Monitor 2: Samsung LF24T35 24" LCD Monitor (75Hz) 1920x1080
Keyboard: Logitext MX Keys (Unifying receiver 2.4GHz)
Mouse: Logitech G903 (Lightspeed wireless receiver)

Laptop:
Macbook Pro 2019

Connections:
Using all cables supplied with KVM switch
Wireless receivers for keyboard and mouse plugged in to the front of KVM switch.
No other USB ports used at the back apart from the USB data cable supplied with the KVM.
HDMI Out 1 → Samsung SF350 24" FHD Thin Bezel Monitor (60Hz)
HDMI Out 2 → Connects to Samsung LF24T35 24" LCD Monitor (75Hz)
HDMI cables connecting both monitors to the KVM (Hight speed HDMI cable with Ethernet AWG E202888)
USB cable running from KVM to PC is connected to USB 2.0 (it was also connected to USB 3.1 Gen 1 and Gen 2)

I have tried changing the USB port used on my PC.
I have tried unplugging the Macbook from the KVM
I have tried swapping the HDMI Out 1 and 2 cables around.
I have tried using the different ports on my GPU… GPU has 1 HDMI and 3 DP’s. Cables given with KVM is 1 DP and 1 HDMI
I have tried having both monitors at 60Hz refresh rate
I have tried having the one monitor at 75Hz refresh rate and the other one at 60Hz refresh rate.
I have tried restarting the KVM and also checking the firmware version, it is on V4.0

Thank you in advance.

Regards

Kevin · May 5, 2025, 4:58pm

Hi Ciabatta,

Thank you for reaching us and we are really sorry for the issues.
Both the USB-C laptop and desktop have this issue or only the USB-C laptop?
For the laptop, you can try use other your own USB-C cable to have a test,such as the 40Gbps cable or Thunderbolt 4 cable.
The provided USB-C cable is USB 3.2 Gen 2.

Ciabatta · May 5, 2025, 7:59pm

Hi Kevin, both the Macbook Pro and the desktop seem to have the same problem. Screens disconnecting intermittently. It appears to happen at random times…

Kevin · May 5, 2025, 11:49pm

Hi,

Which monitor have this issue or both two?
What are their output resolution and refresh rate?
How about try lowering the problem monitor with a lower resolution or refresh rate to have a test?
And also try replace with other HDMI cable for the monitors to check.

Ciabatta · May 6, 2025, 7:50am

Monitors giving issues:

It is both monitors. So both monitors disconnect and reconnect at the same time everytime.

Ouput resolution and refresh rate:

Monitor 1 : Samsung SF350 24" FHD Thin Bezel Monitor (60Hz) 1920x1080
Monitor 2 : Samsung LF24T35 24" LCD Monitor (75Hz) 1920x1080
I tried setting Monitor 1 to 60Hz (1920 x 1080) and Monitor 2 to 75Hz (1920 x 1080) and the disconnects still happen.
I tried setting both monitors to 60Hz and 1920 x 1080 and the disconnects still happen.

Other HDMI Cables:

I have also tried with different HDMI cables on one and both monitors and it still happens.

Ciabatta · May 7, 2025, 3:20pm

So I think I might have solved my intermittent disconnections on Linux. I will post my solution below. I had to go and dig around in the journalctl of Linux. I ended up in the journalctl because I was looking for a place where I can maybe find log files from the iDock, because I do not know whether the iDock keeps log files on board, if so, I have no clue as to how to access those.

A suggestion from my side would be a place where log files can be written from the iDock and accessed by users. I know these things are not always easy to do, so it is merely a suggestion.

Ciabatta · May 7, 2025, 4:44pm

On Linux in my terminal, I ran the following command, I ran this command directly after I saw the disconnect happen:
sudo journalctl --since="-1minutes", so the time indicates how far back it displays the log file, the output looked as follows:

May 06 22:56:21 computerDesktop brltty[11742]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:23 computerDesktop kernel: usb 1-5: USB disconnect, device number 43
May 06 22:56:24 computerDesktop kernel: usb 1-5.1: USB disconnect, device number 46
May 06 22:56:24 computerDesktop kernel: usb 1-5.1.4: USB disconnect, device number 47
May 06 22:56:24 computerDesktop kernel: usb 1-5.1.4.2: USB disconnect, device number 48
May 06 22:56:24 computerDesktop kernel: usb 1-5.1.4.3: USB disconnect, device number 49
May 06 22:56:24 computerDesktop kernel: usb 2-1: USB disconnect, device number 10
May 06 22:56:24 computerDesktop kernel: usb 2-1.4: USB disconnect, device number 11
May 06 22:56:24 computerDesktop kernel: usb 1-5.1.4.4: USB disconnect, device number 50
May 06 22:56:24 computerDesktop kernel: usb 1-5.1.4.4.2: USB disconnect, device number 51
May 06 22:56:24 computerDesktop kernel: usb 1-5.2: USB disconnect, device number 44
May 06 22:56:24 computerDesktop kernel: usb 1-5.3: USB disconnect, device number 45
May 06 22:56:23 computerDesktop acpid[1343]: input device has been disconnected, fd 20
May 06 22:56:23 computerDesktop acpid[1343]: input device has been disconnected, fd 21
May 06 22:56:23 computerDesktop acpid[1343]: input device has been disconnected, fd 22
May 06 22:56:24 computerDesktop acpid[1343]: input device has been disconnected, fd 18
May 06 22:56:24 computerDesktop snapd[1384]: udevmon.go:149: udev event error: Unable to parse uevent, err: cannot parse libu>
May 06 22:56:24 computerDesktop snapd[1384]: udevmon.go:149: udev event error: Unable to parse uevent, err: cannot parse libu>
May 06 22:56:24 computerDesktop brltty[11742]: select: Interrupted system call
May 06 22:56:24 computerDesktop brltty[11742]: brltty: select: Interrupted system call
May 06 22:56:24 computerDesktop systemd[1]: Stopping brltty-udev.service - Braille Device Support...
May 06 22:56:24 computerDesktop acpid[1343]: input device has been disconnected, fd 19
May 06 22:56:24 computerDesktop systemd[1]: brltty-udev.service: Deactivated successfully.
May 06 22:56:24 computerDesktop systemd[1]: Stopped brltty-udev.service - Braille Device Support.
May 06 22:56:24 computerDesktop systemd[1]: brltty-udev.service: Consumed 1.626s CPU time.
May 06 22:56:24 computerDesktop kernel: nvidia-modeset: WARNING: GPU:0: Unable to read EDID for display device Samsung LF24T3>
May 06 22:56:24 computerDesktop cosmic-comp[3524]: Failed to set new config.
May 06 22:56:24 computerDesktop cosmic-comp[3524]: Failed to reset config.
May 06 22:56:24 computerDesktop kernel: nvidia-modeset: WARNING: GPU:0: Unable to read EDID for display device HDMI-0
May 06 22:56:24 computerDesktop cosmic-comp[3524]: Failed to set new config.
May 06 22:56:24 computerDesktop cosmic-comp[3524]: Failed to reset config.
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletAudio: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppList: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletStatusArea: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletTiling: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletNotifications: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletBluetooth: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletMinimize: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletTime: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicPanelWorkspacesButton: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletPower: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletNetwork: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletInputSources: exited with code 137
May 06 22:56:24 computerDesktop cosmic-panel[3601]: com.system76.CosmicPanelAppButton: exited with code 137
May 06 22:56:24 computerDesktop fwupd[9725]: 20:56:24.776 FuDevice             disabling polling: failed to open /dev/hidraw7
May 06 22:56:25 computerDesktop kernel: usb 1-5: new high-speed USB device number 52 using xhci_hcd
May 06 22:56:25 computerDesktop kernel: usb 1-5: New USB device found, idVendor=1a40, idProduct=0101, bcdDevice= 1.11
May 06 22:56:25 computerDesktop kernel: usb 1-5: New USB device strings: Mfr=0, Product=1, SerialNumber=0
May 06 22:56:25 computerDesktop kernel: usb 1-5: Product: USB 2.0 Hub
May 06 22:56:25 computerDesktop kernel: hub 1-5:1.0: USB hub found
May 06 22:56:25 computerDesktop kernel: hub 1-5:1.0: 4 ports detected
May 06 22:56:26 computerDesktop kernel: usb 2-1: new SuperSpeed USB device number 12 using xhci_hcd
May 06 22:56:26 computerDesktop kernel: usb 2-1: New USB device found, idVendor=05e3, idProduct=0626, bcdDevice= 6.63
May 06 22:56:26 computerDesktop kernel: usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:26 computerDesktop kernel: usb 2-1: Product: USB3.1 Hub
May 06 22:56:26 computerDesktop kernel: usb 2-1: Manufacturer: GenesysLogic
May 06 22:56:26 computerDesktop kernel: hub 2-1:1.0: USB hub found
May 06 22:56:26 computerDesktop kernel: hub 2-1:1.0: 4 ports detected
May 06 22:56:26 computerDesktop kernel: usb 1-5.1: new high-speed USB device number 53 using xhci_hcd
May 06 22:56:26 computerDesktop kernel: usb 1-5.1: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice= 6.63
May 06 22:56:26 computerDesktop kernel: usb 1-5.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:26 computerDesktop kernel: usb 1-5.1: Product: USB2.1 Hub
May 06 22:56:26 computerDesktop kernel: usb 1-5.1: Manufacturer: GenesysLogic
May 06 22:56:26 computerDesktop kernel: hub 1-5.1:1.0: USB hub found
May 06 22:56:26 computerDesktop kernel: hub 1-5.1:1.0: 4 ports detected
May 06 22:56:26 computerDesktop kernel: usb 2-1.4: new SuperSpeed USB device number 13 using xhci_hcd
May 06 22:56:26 computerDesktop kernel: usb 2-1.4: New USB device found, idVendor=05e3, idProduct=0626, bcdDevice= 6.63
May 06 22:56:26 computerDesktop kernel: usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:26 computerDesktop kernel: usb 2-1.4: Product: USB3.1 Hub
May 06 22:56:26 computerDesktop kernel: usb 2-1.4: Manufacturer: GenesysLogic
May 06 22:56:26 computerDesktop kernel: hub 2-1.4:1.0: USB hub found
May 06 22:56:26 computerDesktop kernel: hub 2-1.4:1.0: 4 ports detected
May 06 22:56:26 computerDesktop kernel: usb 1-5.2: new full-speed USB device number 54 using xhci_hcd
May 06 22:56:27 computerDesktop kernel: usb 1-5.2: New USB device found, idVendor=1a86, idProduct=e229, bcdDevice=38.00
May 06 22:56:27 computerDesktop kernel: usb 1-5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 06 22:56:27 computerDesktop kernel: usb 1-5.2: Product: WCH UART TO KB-MS_V1.8
May 06 22:56:27 computerDesktop kernel: usb 1-5.2: Manufacturer: WWW.WCH.CN
May 06 22:56:27 computerDesktop kernel: usb 1-5.2: SerialNumber: 2019A15208B5
May 06 22:56:27 computerDesktop kernel: input: WWW.WCH.CN WCH UART TO KB-MS_V1.8 as /devices/pci0000:00/0000:00:14.0/usb1/1-5>
May 06 22:56:27 computerDesktop kernel: hid-generic 0003:1A86:E229.0035: input,hidraw1: USB HID v1.10 Keyboard [WWW.WCH.CN WC>
May 06 22:56:27 computerDesktop mtp-probe[12874]: checking bus 1, device 54: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:27 computerDesktop mtp-probe[12874]: bus: 1, device: 54 was not an MTP device
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4: new high-speed USB device number 55 using xhci_hcd
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice= 6.63
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4: Product: USB2.1 Hub
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4: Manufacturer: GenesysLogic
May 06 22:56:27 computerDesktop kernel: hub 1-5.1.4:1.0: USB hub found
May 06 22:56:27 computerDesktop kernel: hub 1-5.1.4:1.0: 4 ports detected
May 06 22:56:27 computerDesktop cosmic-comp[3524]: Failed to destroy old mode property blob: No such file or directory (os er>
May 06 22:56:27 computerDesktop kernel: usb 1-5.3: new full-speed USB device number 56 using xhci_hcd
May 06 22:56:27 computerDesktop kernel: usb 1-5.3: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64
May 06 22:56:27 computerDesktop kernel: usb 1-5.3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
May 06 22:56:27 computerDesktop kernel: usb 1-5.3: Product: USB Serial
May 06 22:56:27 computerDesktop kernel: ch341 1-5.3:1.0: ch341-uart converter detected
May 06 22:56:27 computerDesktop kernel: usb 1-5.3: ch341-uart converter now attached to ttyUSB0
May 06 22:56:27 computerDesktop mtp-probe[12883]: checking bus 1, device 56: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:27 computerDesktop systemd-logind[1389]: Watching system buttons on /dev/input/event4 (WWW.WCH.CN WCH UART TO KB>
May 06 22:56:27 computerDesktop mtp-probe[12905]: checking bus 1, device 54: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:27 computerDesktop mtp-probe[12905]: bus: 1, device: 54 was not an MTP device
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4.2: new full-speed USB device number 57 using xhci_hcd
May 06 22:56:27 computerDesktop cosmic-comp[3524]: Failed to set xwayland primary output: The provided output wasn't known to>
May 06 22:56:27 computerDesktop cosmic-comp[3524]: Failed to set xwayland primary output: The provided output wasn't known to>
May 06 22:56:27 computerDesktop cosmic-comp[3524]: Failed to set xwayland primary output: The provided output wasn't known to>
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4.2: New USB device found, idVendor=046d, idProduct=c539, bcdDevice=39.06
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4.2: Product: USB Receiver
May 06 22:56:27 computerDesktop kernel: usb 1-5.1.4.2: Manufacturer: Logitech
May 06 22:56:27 computerDesktop kernel: logitech-djreceiver 0003:046D:C539.0036: hidraw2: USB HID v1.11 Keyboard [Logitech US>
May 06 22:56:27 computerDesktop kernel: logitech-djreceiver 0003:046D:C539.0037: hiddev2,hidraw4: USB HID v1.11 Mouse [Logite>
May 06 22:56:27 computerDesktop kernel: logitech-djreceiver 0003:046D:C539.0038: hiddev3,hidraw5: USB HID v1.11 Device [Logit>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletStatusArea: Bus name 'org.kde.StatusNotifierWatc>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletStatusArea: Error getting config: com.system76.C>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicPanelWorkspacesButton: Error getting config: com.syste>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletAudio: Error getting config: com.system76.Cosmic>
May 06 22:56:27 computerDesktop kernel: logitech-djreceiver 0003:046D:C539.0038: device of type eQUAD Lightspeed 1 (0x0c) con>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletPower: Error getting config: com.system76.Cosmic>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletNotifications: Error getting config: com.system7>
May 06 22:56:27 computerDesktop systemd[1]: Starting systemd-timedated.service - Time & Date Service...
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletTime: Error getting config: com.system76.CosmicT>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletTiling: Error getting config: com.system76.Cosmi>
May 06 22:56:27 computerDesktop systemd[1]: Started systemd-timedated.service - Time & Date Service.
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletBluetooth: Error getting config: com.system76.Co>
May 06 22:56:27 computerDesktop dbus-broker[1340]: A security policy denied :1.203 to send method call /org/freedesktop/Netwo>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletNetwork: Error getting config: com.system76.Cosm>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicPanelAppButton: Error getting config: com.system76.Cos>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletMinimize: Error getting config: com.system76.Cos>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletInputSources: Error getting config: com.system76>
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletBattery: Error getting config: com.system76.Cosm>
May 06 22:56:27 computerDesktop kernel: input: Logitech G903 LS as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.1/1-5.1.4/1->
May 06 22:56:27 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppList: Error getting config: com.system76.CosmicTk [>
May 06 22:56:28 computerDesktop kernel: logitech-hidpp-device 0003:046D:4087.0039: input,hidraw6: USB HID v1.11 Keyboard [Log>
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.3: new full-speed USB device number 58 using xhci_hcd
May 06 22:56:28 computerDesktop cosmic-panel[3601]: com.system76.CosmicAppletBattery: exited with code 0
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.3: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.3: Product: USB Receiver
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.3: Manufacturer: Logitech
May 06 22:56:28 computerDesktop kernel: logitech-djreceiver 0003:046D:C52B.003C: hiddev4,hidraw7: USB HID v1.11 Device [Logit>
May 06 22:56:28 computerDesktop kernel: input: Logitech MX Keys as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.1/1-5.1.4/1->
May 06 22:56:28 computerDesktop kernel: logitech-hidpp-device 0003:046D:408A.003D: input,hidraw8: USB HID v1.11 Keyboard [Log>
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.4: new high-speed USB device number 59 using xhci_hcd
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.4: New USB device found, idVendor=1a40, idProduct=0101, bcdDevice= 1.11
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.4: New USB device strings: Mfr=0, Product=1, SerialNumber=0
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.4: Product: USB 2.0 Hub
May 06 22:56:28 computerDesktop kernel: hub 1-5.1.4.4:1.0: USB hub found
May 06 22:56:28 computerDesktop kernel: hub 1-5.1.4.4:1.0: 4 ports detected
May 06 22:56:28 computerDesktop mtp-probe[12883]: bus: 1, device: 56 was not an MTP device
May 06 22:56:28 computerDesktop snapd[1384]: udevmon.go:149: udev event error: Unable to parse uevent, err: cannot parse libu>
May 06 22:56:28 computerDesktop mtp-probe[13236]: checking bus 1, device 57: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:28 computerDesktop mtp-probe[13235]: checking bus 1, device 58: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:28 computerDesktop mtp-probe[13236]: bus: 1, device: 57 was not an MTP device
May 06 22:56:28 computerDesktop mtp-probe[13235]: bus: 1, device: 58 was not an MTP device
May 06 22:56:28 computerDesktop systemd[1]: Starting brltty-udev.service - Braille Device Support...
May 06 22:56:28 computerDesktop snapd[1384]: hotplug.go:200: hotplug device add event ignored, enable experimental.hotplug
May 06 22:56:28 computerDesktop brltty[13228]: BRLTTY 6.6 rev BRLTTY-6.6 [https://brltty.app/]
May 06 22:56:28 computerDesktop brltty[13228]: BRLTTY 6.6 rev BRLTTY-6.6 [https://brltty.app/]
May 06 22:56:28 computerDesktop brltty[13228]: brltty: executing as the invoking user: root
May 06 22:56:28 computerDesktop brltty[13228]: executing as the invoking user: root
May 06 22:56:28 computerDesktop mtp-probe[13263]: checking bus 1, device 56: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:28 computerDesktop mtp-probe[13263]: bus: 1, device: 56 was not an MTP device
May 06 22:56:28 computerDesktop snapd[1384]: udevmon.go:149: udev event error: Unable to parse uevent, err: cannot parse libu>
May 06 22:56:28 computerDesktop mtp-probe[13299]: checking bus 1, device 57: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:28 computerDesktop mtp-probe[13299]: bus: 1, device: 57 was not an MTP device
May 06 22:56:28 computerDesktop mtp-probe[13300]: checking bus 1, device 58: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:28 computerDesktop mtp-probe[13300]: bus: 1, device: 58 was not an MTP device
May 06 22:56:28 computerDesktop systemd-logind[1389]: Watching system buttons on /dev/input/event6 (Logitech MX Keys)
May 06 22:56:28 computerDesktop systemd-logind[1389]: Watching system buttons on /dev/input/event5 (Logitech G903 LS)
May 06 22:56:28 computerDesktop kernel: usb 1-5.1.4.4.2: new full-speed USB device number 60 using xhci_hcd
May 06 22:56:29 computerDesktop brltty[13228]: CLDR open error: No such file or directory: /usr/share/unicode/cldr/common/ann>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: CLDR open error: No such file or directory: /usr/share/unicode/cldr/co>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: possible cause: the package that defines the CLDR annotations director>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: emoji substitutiion won't be performed
May 06 22:56:29 computerDesktop brltty[13228]: possible cause: the package that defines the CLDR annotations directory is not>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: CLDR open error: No such file or directory: /usr/share/unicode/cldr/co>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: possible cause: the package that defines the CLDR annotations director>
May 06 22:56:29 computerDesktop brltty[13228]: brltty: emoji substitutiion won't be performed
May 06 22:56:29 computerDesktop brltty[13228]: emoji substitutiion won't be performed
May 06 22:56:29 computerDesktop brltty[13228]: brltty: BrlAPI Server: release 0.8.5
May 06 22:56:29 computerDesktop brltty[13228]: CLDR open error: No such file or directory: /usr/share/unicode/cldr/common/ann>
May 06 22:56:29 computerDesktop brltty[13228]: possible cause: the package that defines the CLDR annotations directory is not>
May 06 22:56:29 computerDesktop brltty[13228]: emoji substitutiion won't be performed
May 06 22:56:29 computerDesktop brltty[13228]: BrlAPI Server: release 0.8.5
May 06 22:56:29 computerDesktop systemd[1]: Started brltty-udev.service - Braille Device Support.
May 06 22:56:29 computerDesktop brltty[13228]: Screen Driver: lx [Linux]
May 06 22:56:29 computerDesktop brltty[13228]: brltty: Screen Driver: lx [Linux]
May 06 22:56:29 computerDesktop kernel: input: BRLTTY 6.6 Linux Screen Driver Keyboard as /devices/virtual/input/input67
May 06 22:56:29 computerDesktop brltty[13228]: USB configuration set error 16: Device or resource busy
May 06 22:56:29 computerDesktop brltty[13228]: brltty: USB configuration set error 16: Device or resource busy
May 06 22:56:29 computerDesktop brltty[13228]: USB interface in use: 0 (ch341)
May 06 22:56:29 computerDesktop kernel: usb 1-5.3: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
May 06 22:56:29 computerDesktop kernel: ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
May 06 22:56:29 computerDesktop kernel: ch341 1-5.3:1.0: device disconnected
May 06 22:56:29 computerDesktop brltty[13228]: brltty: USB interface in use: 0 (ch341)
May 06 22:56:29 computerDesktop ModemManager[1633]: <msg> [base-manager] port ttyUSB0 released by device '/sys/devices/pci000>
May 06 22:56:29 computerDesktop ModemManager[1633]: <msg> [base-manager] couldn't check support for device '/sys/devices/pci0>
May 06 22:56:29 computerDesktop brltty[13228]: Speech Driver: no [NoSpeech]
May 06 22:56:29 computerDesktop brltty[13228]: brltty: Speech Driver: no [NoSpeech]
May 06 22:56:29 computerDesktop systemd-logind[1389]: Watching system buttons on /dev/input/event7 (BRLTTY 6.6 Linux Screen D>
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: New USB device found, idVendor=0d8c, idProduct=0014, bcdDevice= 1.00
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: Product: USB Audio Device
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: Manufacturer: C-Media Electronics Inc.
May 06 22:56:29 computerDesktop kernel: cmedia_hs100b 0003:0D8C:0014.003E: Fixing CMedia HS-100B report descriptor
May 06 22:56:29 computerDesktop kernel: input: C-Media Electronics Inc. USB Audio Device as /devices/pci0000:00/0000:00:14.0/>
May 06 22:56:29 computerDesktop kernel: cmedia_hs100b 0003:0D8C:0014.003E: input,hidraw9: USB HID v1.00 Device [C-Media Elect>
May 06 22:56:29 computerDesktop mtp-probe[13323]: checking bus 1, device 60: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:29 computerDesktop mtp-probe[13323]: bus: 1, device: 60 was not an MTP device
May 06 22:56:29 computerDesktop mtp-probe[13347]: checking bus 1, device 60: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1>
May 06 22:56:29 computerDesktop mtp-probe[13347]: bus: 1, device: 60 was not an MTP device
May 06 22:56:30 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:30 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:30 computerDesktop kernel: logitech-hidpp-device 0003:046D:408A.003D: HID++ 4.5 device connected.
May 06 22:56:31 computerDesktop geoclue[3712]: Failed to query location: Query location SOUP error: Not Found
May 06 22:56:31 computerDesktop kernel: logitech-hidpp-device 0003:046D:4087.0039: HID++ 4.2 device connected.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop systemd[3445]: Started app-cosmic-com.system76.CosmicAppList-13357.scope - Application launch>
May 06 22:56:35 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:35 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:40 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:40 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:43 computerDesktop sudo[13396]: user : TTY=pts/0 ; PWD=/home/user ; USER=root ; COMMAND=/usr/bin/journ>
May 06 22:56:43 computerDesktop sudo[13396]: pam_unix(sudo:session): session opened for user root(uid=0) by user(uid=100>
lines 212-240/240 (END)
May 06 22:56:29 computerDesktop brltty[13228]: Speech Driver: no [NoSpeech]
May 06 22:56:29 computerDesktop brltty[13228]: brltty: Speech Driver: no [NoSpeech]
May 06 22:56:29 computerDesktop systemd-logind[1389]: Watching system buttons on /dev/input/event7 (BRLTTY 6.6 Linux Screen Driver Keyboard)
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: New USB device found, idVendor=0d8c, idProduct=0014, bcdDevice= 1.00
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: Product: USB Audio Device
May 06 22:56:29 computerDesktop kernel: usb 1-5.1.4.4.2: Manufacturer: C-Media Electronics Inc.
May 06 22:56:29 computerDesktop kernel: cmedia_hs100b 0003:0D8C:0014.003E: Fixing CMedia HS-100B report descriptor
May 06 22:56:29 computerDesktop kernel: input: C-Media Electronics Inc. USB Audio Device as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.1/1-5.1.4/1-5.1.4.4/1-5.1.4.4.2/1-5.1.4.4.2:1.3/0003:0D8C:0014.003E/input/input68
May 06 22:56:29 computerDesktop kernel: cmedia_hs100b 0003:0D8C:0014.003E: input,hidraw9: USB HID v1.00 Device [C-Media Electronics Inc. USB Audio Device] on usb-0000:00:14.0-5.1.4.4.2/input3
May 06 22:56:29 computerDesktop mtp-probe[13323]: checking bus 1, device 60: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.1/1-5.1.4/1-5.1.4.4/1-5.1.4.4.2"
May 06 22:56:29 computerDesktop mtp-probe[13323]: bus: 1, device: 60 was not an MTP device
May 06 22:56:29 computerDesktop mtp-probe[13347]: checking bus 1, device 60: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.1/1-5.1.4/1-5.1.4.4/1-5.1.4.4.2"
May 06 22:56:29 computerDesktop mtp-probe[13347]: bus: 1, device: 60 was not an MTP device
May 06 22:56:30 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:30 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:30 computerDesktop kernel: logitech-hidpp-device 0003:046D:408A.003D: HID++ 4.5 device connected.
May 06 22:56:31 computerDesktop geoclue[3712]: Failed to query location: Query location SOUP error: Not Found
May 06 22:56:31 computerDesktop kernel: logitech-hidpp-device 0003:046D:4087.0039: HID++ 4.2 device connected.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop cosmic-comp[3524]: Client bug: Unable to re-configure repositioned popup.
May 06 22:56:33 computerDesktop systemd[3445]: Started app-cosmic-com.system76.CosmicAppList-13357.scope - Application launched by COSMIC.
May 06 22:56:35 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:35 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:40 computerDesktop brltty[13228]: unsupported generic resource identifier: bluetooth:
May 06 22:56:40 computerDesktop brltty[13228]: brltty: unsupported generic resource identifier: bluetooth:
May 06 22:56:43 computerDesktop sudo[13396]: user : TTY=pts/0 ; PWD=/home/user ; USER=root ; COMMAND=/usr/bin/journalctl '--since=-1 minutes'
May 06 22:56:43 computerDesktop sudo[13396]: pam_unix(sudo:session): session opened for user root(uid=0) by user(uid=1000)

Ciabatta · May 7, 2025, 4:49pm

The primary cause appears to be a conflict with the brltty service, which is designed to support braille devices. Here is what I could see in the log above:

At 22:56:23, multiple USB disconnect events occur, indicating that the peripherals disconnected.
Then at 22:56:25-29, they reconnect again
Finally at 22:56:29, brltty tried to take over a USB interface that was already used by something else:

brltty[13228]: USB configuration set error 16: Device or resource busy
brltty[13228]: USB interface in use: 0 (ch341)
usb 1-5.3: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0

The system detects the iDock’s USB serial chip, but then the brltty service thinks it is a braille display and causes a conflict, that then in turn causes the intermittent disconnections.

Ciabatta · May 7, 2025, 4:58pm

The solutions that worked:

I had to disable the ‘brltty’ service by running the following commands in my terminal on Linux.

sudo systemctl stop brltty
sudo systemctl disable brltty

Then I ran the command below, this prevents the service from being started by any means - manually, at boot, or when triggered by another service or device.

sudo systemctl mask brltty

Then disable the udev rule that triggers brltty for USB devices, By removing these rules, it stops the detection and application of braille devices, even devices that might appear as braille devices:

sudo rm /usr/lib/udev/rules.d/*brltty*.rules

I am not at all a Linux expert, so I would say, err on the side of caution. I was taking a risk, because I was becoming tired of the intermittent disconnections. Linux is my daily OS (even if I am not an expert, I am trying to learn). I think it also happened with the Macbook Pro because the KVM uses EDID, so the Desktop PC is tricked into thinking the displays are still there… So when the braille device interrupts again, the screens disconnects even when on MacOS.

I hope this can help someone… My problem seems to be solved. Thank you for your time Kevin.

Kevin · May 8, 2025, 12:06am

Hi,

Appreciate for your sharing and your solution is very useful to us and other customers.

Ciabatta · May 8, 2025, 2:31pm

This has also fixed a few other problems that were noticeable, but I was not worried about at the moment of creating this post…

The iDock is not getting super hot anymore, it is warm, but not hot, it is room temperature now.
Switching between my Desktop PC and my Macbook Pro laptop is instant now, where usually switching from my Desktop PC to my Macbook Pro took about 10 seconds, and status indicator on the iDock itself stayed on the Desktop PC indicator for that whole 10 seconds before switching over to the Laptop indicator.
Then when the active device was the Macbook Pro, sometimes only 1 screen would come on, the other would not come on, but now both screens come on as well.

Kevin · May 9, 2025, 12:29am

Hi,

Appreciate for you update and will submit to our engineer your these information.
Have a good day!