*** 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
few pixels wide that are corrupted into random snow when watching video, and
occasionally the lines take up 1/3 of the screen and the screen goes black for
a second or two.
relevant dmegs -w output
[ 26.555038] sof-audio-pci 0000:00:1f.3: error: no reply expected, received
0x0
[ 26.648780] sof-audio-pci 0000:00:1f.3: firmware boot complete
[ 44.154221] sof-audio-pci 0000:00:1f.3: error: no reply expected, received
0x0
[ 44.245269] sof-audio-pci 0000:00:1f.3: firmware boot complete
[ 286.125367] ideapad_laptop: Unknown event: 10
[ 340.736173] sof-audio-pci 0000:00:1f.3: error: no reply expected, received
0x0
[ 340.829032] sof-audio-pci 0000:00:1f.3: firmware boot complete
Nothing changed in the non-debug log on first glance.
So to me it looks like there's another uncovered bug happening.
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https://bugs.launchpad.net/bugs/1875649
Title:
[Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940
14-IIL
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