Comment 5 for bug 1970426

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Johannes Stöckelmaier (jostoe) wrote : Re: screen suddenly starts flickering after update

I can also confirm that I experience this issue.

Before, I used Ubuntu 21.04 with Wayland, similar hardware/settings and the corresponding kernel of 21.04 and never had this issue once.
After a fresh install of 22.04 it came up around once per hour.

When running "dmesg -T", the occurrence of the issue corresponds with error:
[Fri Apr 29 13:10:21 2022] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

I tried to set:
intel_idle.max_cstate=4
i915.enable_psr=0
It probably reduces the frequency the issue comes up but does not fix it.

sudo lshw -c video
  *-display
       description: VGA compatible controller
       product: Skylake GT2 [HD Graphics 520]
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 07
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=i915 latency=0 resolution=2560,1440
       resources: irq:130 memory:e0000000-e0ffffff memory:c0000000-dfffffff ioport:e000(size=64) memory:c0000-dffff