System hangs on shutdown when using drm.edid kernel parameter
Submitted by Neil Kownacki
Assigned to Intel GFX Bugs mailing list
Link to original bug (#112145)
Description
Created attachment 145831
dmesg log drm.debug=0xe
I am experiencing an issue where my system hangs instead of properly shutting down when my laptop is docked. One of my monitors has EDID issues, so I have to force an EDID using drm.edid. I noticed that when I remove the parameter, I have no issues shutting down. This issue occurs on the current drm-tip kernel (compiled as of commit e2561817d912857cdf7437e73a8fb41256d06edb.) I believe this may be a regression as I do not remember it happening before, but I will need to do more digging to find a previous kernel version that works.
Thinkpad X270 i7-7500U
UEFI version: R0IET58W (1.36)
How often: always
Steps to reproduce:
-Boot up laptop and login
-Close lid and put it on the dock
-Shutdown with the laptop still on the dock
Attachment 145831, "dmesg log drm.debug=0xe":
dmesg.log