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pop-os / cosmic-epoch

Next generation Cosmic desktop environment
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Screen Flickering [drm] *ERROR* CPU pipe A FIFO underrun: transcoder #467

Open mothbe opened 1 month ago

mothbe commented 1 month ago

While I know that the issue may be related to i915 driver this might still help to find bugs.

On my device, the screen regularly goes completely black while using the desktop . It happen when I moving windows by using keyboard shortcuts only e.g. Super-Shift-H, Super-Shift-L, Super-Shift-M. This never happened when I use mouse for the same window moving scenario.

In dmesg I getting an entry:

i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun: transcoder
Drakulix commented 1 month ago

Trying to research this, this seems like an upstream bug: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/2077

I don't think there is a lot we can do here. Fixing https://github.com/pop-os/cosmic-comp/issues/649 might help to at least restore the output eventually, when this happens. But a black screen could have a bunch of reasons, it isn't clear the surface thread actually crashes in your case.

mothbe commented 1 month ago

I did not find solution so created i915 issue.