Screen flickering gone with latest firmware update :)
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1975621
Title:
A new firmware has been pushed for the machine (new version is 4.17) with fixes.
I think the fix about the C-States is probably the one that should reduce, or
eliminate, that flickering problem from the i915.
Upgrading and will report in a few days about improvements, if any.
StarLite MkIV:
The problem does not happen frequently :
Jun 2 22:01:46 pluton kernel: [3.544530] systemd[1]: Listening on
Device-mapper event daemon FIFOs.
Jun 2 22:14:51 pluton kernel: [ 790.744064] i915 :00:02.0: [drm] *ERROR*
CPU pipe A FIFO underrun
Jun 3 00:00:15 pluton kernel: [3.540836]
Since I removed xserver-xorg-video-intel
The screen still flickers but seems to happen much less often.
Jun 3 00:03:34 pluton kernel: [ 205.129238] i915 :00:02.0: [drm]
*ERROR* CPU pipe A FIFO underrun
Seems to happen a few minutes after rebooting. Then it is very rare.
Does removing that
I am trying something new : since the machine is using Wayland I have
removeed the following package that was installed by default (as
[installed,automatic]) :
xserver-xorg-video-intel
Seen on the following post that it could help :
https://forums.debian.net/viewtopic.php?t=149472
Will report to
Currently I'm using the machine with the psr_enabled=0
But I still see the screen flash from time to time. Every time the screen does
flash the following line appears in my /var/log/syslog :
May 28 20:28:14 pluton kernel: [ 67.780548] i915 :00:02.0: [drm]
*ERROR* CPU pipe A FIFO underrun
-
** Summary changed:
- screen flashes on-off unless PSR is turned off
+ [Star Labs Lite IV] screen flashes on-off unless PSR is turned off
** Package changed: xorg (Ubuntu) => linux (Ubuntu)
** Tags added: psr
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