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Hardware • HP Thunderbolt G4 dock no USB with boot or wake but ok after reboot

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Dear Debian community,

I am hoping to get some advice on how to troubleshoot and rectify my Thunderbolt G4 dock USB problem.

I have this weird problem where if I boot the laptop (Acer Predator G9-792) with the dock connected none of the USB devices attached to it (the dock) work. However, the dual monitors work as expected. If i reboot the laptop the dock works as expected - no notable problems appear. However, the moment the laptop goes to sleep, I am not able to wake it using the mouse and keyboard connected to the dock. The laptop trackpad and keys work. Monitors wake up as expected, but no mouse or keyboard. If I restart the laptop again, the dock works as normal...

I tried a number of previously suggested solutions across various forums including disabling the autosuspend of usb devices in grub but none of them did anything to fix the issue.

Below are dmesg pastebin dumps with the respective conditions for reference:
1. dmesg_boot-with-no-dock-connected
2. dmesg_with-dock-pluged-in
3. dmesg_after-reboot-with-dock-connected
4. dmesg_after-wake-with-dock-connected

I think I have a number of issues when it comes to identifying and understanding the problem:
1. I don't fully understand the structure of the attached hardware from a connection/registration perspective or their internal construction/operations. This is exacerbated by the next issue;
2. Because there are so many registrations of USB and xHCI devices that it becomes too difficult for me to find what each registration/detection refers to, what are expected vice unexpected conditions (other than the obvious failures), and why even are there so many registrations of USB hubs???
3. What next...?

From the reading I did across forums and the dmesg dumps, to me it looks like the issue is related to the xHCI, but I'd be damned if I knew what to do next to troubleshoot or even confirm this...
I have been trying to figure this out for several weeks now but have hit a wall and have no idea what to do next. I apologise, I have probably omitted a bunch of troubleshooting steps and am happy to provide more information that might be helpful to effectively troubleshoot this.

Any support would be greatly appreciated.

Many thanks in advance!

P.S. I have the latest dock firmware and UEFI and motherboard firmware updates applied.

Statistics: Posted by dukman — 2024-02-17 11:01 — Replies 0 — Views 10



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