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

Hi everyone,

SO… I switched to Ubuntu 20.04.06 LTS as it was noted to be compatible with the dock. I ran it with the following kernels:

• 5.15.0-100-generic/focal-updates,focal-security,now 5.15.0-100.110~20.04.1 amd64 (default kernel)

• unsigned-6.8.0-060800-generic/now 6.8.0-060800.202403131158 amd64

• unsigned-5.14.0-051400-generic/now 5.14.0-051400.202108292331 amd64 (identified as compatible per the dock’s White Paper)

I observed the following:

• 5.15.0-100-generic
  • Similar as previously reported: does not work on start-up or when waking from suspend. Works consistently after each subsequent reboot
  • Does NOT boot (when rebooting to enable dock) if there are a number of kernels installed with the dock connected (weird, because with one kernel it boots fine with dock connected!)
  • If I unplug the dock while it is working and then re-plug it, then reboot, the computer pretty much consistently freezes at the start-up screen and fails to boot
  • Boots consistently each time with a number of kernels present if dock is not connected

• 6.8.0-060800-generic
  • Similar as previously reported: does not work on start-up or when waking from suspend. Works consistently after each subsequent reboot
  • Does NOT boot (when rebooting to enable dock) if there are a number of kernels installed with the dock connected (weird, because with one kernel it boots fine with dock connected!)
  • If I unplug the dock while it is working and then re-plug it, then reboot, the computer pretty much consistently freezes at the start-up screen and fails to boot
  • Boots consistently each time with a number of kernels present if dock is not connected

• 5.14.0-051400-generic
  • Similar as previously reported: does not work on start-up or when waking from suspend. Works consistently after each subsequent reboot
  • Does NOT boot (when rebooting to enable dock) if there are a number of kernels installed with the dock connected (weird, because with one kernel it boots fine with dock connected!)
  • If I unplug the dock while it is working and then re-plug it, then reboot, the computer pretty much consistently freezes at the start-up screen and fails to boot
  • Boots consistently each time with a number of kernels present if dock is not connected

Is the kernel not handling the power-on/suspend functionality of the xhci_hcd properly? Either way, I can’t get around the fact that it does work… after a reboot.

Any additional advice is greatly appreciated!

Statistics: Posted by dukman — 2024-03-15 10:11

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