** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Assignee: (unassigned) => AceLan Kao (acelankao)
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https://bugs.launchpad.net/bugs/2002467
Title:
ThinkPad L14 Gen 3 blank laptop screen on bootup
Status in linux-oem-5.17 package in Ubuntu:
Invalid
Status in linux-oem-5.17 source package in Jammy:
Triaged
Bug description:
When booting linux-image-5.17.0-1026-oem version 5.17.0.1026.27 on a
Lenovo ThinkPad L14 Gen 3 AMD (model 21C5CTO1WW), the screen goes
blank shortly after bootup.
As far as I can tell (the screen blanks pretty quickly, so I'm not
100% sure), the last message before the screen disappears is this one:
Jan 9 07:58:30 work kernel: [ 1.321487] fb0: switching to amdgpu
from EFI VGA
Booting linux-image-5.17.0-1025-oem version 5.17.0.1025.26 works fine,
so this appears to be a regression in whatever changes there were in
the framebuffer/amdgpu drivers between 5.17.0.1025.26 and
5.17.0.1026.27.
I think this should be high priority, because it gives the impression
that the system is completely borked, when in actuality it's probably
just waiting for me to enter my drive encryption password.
If I type the encryption password, it seems to progress to starting
the system (the microphone mute LED comes on as expected), but even X
starting does not turn the screen back on. Switching to the frame
buffer console with Ctrl-Alt-Fx does nothing.
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