Fullscreen graphical glitches in multi-gpu setup

shumvgolove commented 3 years ago

Sway Version: sway version 1.5-cc8d318a (Oct 19 2020, branch 'master')
Debug Log: sway.log
Configuration File: config.txt
Description: I have a multi-gpu setup with amd card (primary) connected to HDMI screen and integrated intel card (secondary) connected to VGA screen. Fullscreening mpv, imv or Alacritty on VGA screen results in pixelated/corrupted output, however fullscreening applications on HDMI one works without issues. This reddit post describes similar behavior. Interestingly, wf-recorder or grim cannot record this messy state and produces normal picture/video. Could this be an amdgpu bug?

Here is the glitched screen.

wlroots has migrated to gitlab.freedesktop.org. This issue has been moved to:

https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/2451

emersion commented 3 years ago

Could be related to direct scanout

emersion commented 3 years ago

And could be related to implicit modifiers: amdgpu allocates a buffer with an implicit modifier and we try to import it on i915. Arguably i915 should reject the import.

swaywm / wlroots

Fullscreen graphical glitches in multi-gpu setup #2451