I'm unable to run the apport-collect command (per the robo-comment
above) when in the problem configuration because things lock up
immediately. Is there any benefit to that command on a subsequent on-
the-AC-brick reboot? Apologies for my ignorance.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1987170
Title:
X1YG7 + Ubuntu 22.04.1 + TB4 Dock + LAN = HANG
Status in linux package in Ubuntu:
Confirmed
Bug description:
(Copy of my Lenovo forum post)
ThinkPad X1 Yoga Gen 7 (12th Gen Intel) BIOS and TB firmware fully
updated. ThinkPad Universal TB4 Dock firmware fully updated. Ubuntu
22.04.1 LTS _installed_ and fully updated. LAN cable plugged into
dock.
Ubuntu boots to login screen. LAN LED on connected switch is ON and
things seem OK. When I log in LAN LED flashes and goes out. Mouse
and keyboard become unresponsive quickly. I am sometimes able to try
to launch FF or select shutdown but that's as far as it gets. Nothing
happens except eventually for the shutdown option the desktop
wallpaper disappears and is replaced with a black screen and flashing
cursor. Forced power off via long button press is the only option.
On reboot to Windows LAN LED is not on, and connection is not restored
until I dis/reconnect the dock. If I boot Ubuntu on the AC brick or
on a Lenovo USB-C Mini Dock + LAN issue doesn't happen. LAN works on
mini dock. If I boot with TB4 dock but no LAN cable, no issue. Wifi
works. My TP X1 Yoga Gen 6 with Ubuntu 21.04.1 LTS booted is fine on
the TB4 dock + LAN.
Attaching syslog. I log in at ~ 17:41:25. Logs include failed
session and subsequent session on AC brick when I extracted the logs.
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