lkml.org 
[lkml]   [2021]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectthinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915)
Hello Devs.

After upgrading to linux 5.12 the display on my X1 Carbon Gen 2 starts
to flicker. Well actually it seems to turn off and on again and again.
Here a link to a video a person posted who has the same issue as me
obviousely.
https://linuxove.com/thinkpad-x1-carbon-gen-3-display-flickering-on-linux-kernel-5-12/

This happens without having Xorg running too. So it can't be related to
Xorg. The kernel boots and after a few seconds, the kernel messages
scoll through, the flickering starts. Nothing special in dmesg.

dmesg:

himbeere@rather ~ $ dmesg | grep i915
[ 0.713595] i915 0000:00:02.0: vgaarb: deactivate vga console
[ 0.720280] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 0.741494] i915 0000:00:02.0: [drm] Panel advertises DPCD backlight
support, but VBT disagrees. If your backlight controls don't work try
booting with i915.enable_dpcd_backlight=1. If your machine needs this,
please file a _new_ bug report on drm/i915, see
https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs
for details.
[ 1.864837] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on
minor 0
[ 1.875907] fbcon: i915drmfb (fb0) is primary device
[ 3.158255] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer
device
himbeere@rather ~ $

Downgrading to 5.11 solves the issue for me. Any ideas?

cheers, t.

\
 
 \ /
  Last update: 2021-05-14 10:40    [W:0.221 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site