I noticed something I can't explain.
I tried Ubuntu 18.04 and that worked flawlessly.
Then I tried Kubuntu 18.04 and the flicker returns.
I don't know the important differences between these two distros in the
graphics stack to nail down the but.
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I tried the ubuntu 20.04 live cd today and the screen flicker re-
appeard.
So:
Ubuntu 18.04: no screen flicker
Kubuntuu 18.04: screen flicker
Ubuntu 20.04: screen flicker
Kubuntu 20.04: screen flicker
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This issue seems to be fixed in a recent update for Kubuntu 20.04,
running kernel 5.4.0-37-generic.
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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ht
There seems to be a known issue of i915 related screen flickering with
relation to power states, refresh rates and eDP for intel i915 in recent
kernels. (If i understand the issue correctly)
Can you confirm that the flickering is thesame as the videos in the
description of: https://gitlab.freedesk
So it looks thesame (maybe a little less) but happens under different
circumstances?
I'm experiencing a similar issue and maybe got a temporary fix.
All I know is that with my laptop (Lenovo Yoga C940 14IL) i've got thesame
flickering as in that issue on Kubuntu 19.10, Kubuntu 20.04 and Fedora KD
*** This bug is a duplicate of bug 1873587 ***
https://bugs.launchpad.net/bugs/1873587
bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875254 mentions that
kernel 5.4.0-28 should've fixed the issue reported in that bug.
kernel 5.4.0-28 and the testkernel mentioned in that issue did
*** This bug is a duplicate of bug 1873587 ***
https://bugs.launchpad.net/bugs/1873587
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1874010 mentions that
kernel 5.5.19 fixes the bug occuring in that pc.
For me it does not, it improves the complete flicker into horizontal lines of a
While https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1873587 also
happens, I'm not that interested in it.
I get screen flicker during normal operation like watching video or opening a
program.
That is more important than some flickers during startup for me since screen
flickers during s
Still occurs on 5.4.0-31 update, only less severe. Laptop is useable now as
long as no video is being played.
By the looks of it, i915.enable_psr=0 as kernel boot parameter doesn't have any
notable effect.
The logmessage using drm.debug=0x06 is as follows:
[ 84.074499] [drm:drm_mode_addfb2 [d
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