https://bugs.freedesktop.org/show_bug.cgi?id=100289

--- Comment #4 from OmegaPhil@startmail.com ---
Just 'Invalid argument' currently.

I just did 10 tests turning the monitor off for just over 30 seconds, and on
turning it back on, the display layout did not break (but I got the usual flip
queue messages):

==================================================

tail -F /var/log/Xorg.0.log | grep -iE 'flip|allocate'

[181332.656] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[181356.321] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[181356.742] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[181357.947] (II) RADEON(0): Allocate new frame buffer 3840x1200 stride 3840
[181387.340] (II) RADEON(0): Allocate new frame buffer 5760x1200 stride 5760
[201695.702] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[201696.734] (II) RADEON(0): Allocate new frame buffer 3840x1200 stride 3840
[201722.513] (II) RADEON(0): Allocate new frame buffer 5760x1200 stride 5760
[220260.080] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253009.764] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253022.375] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253034.800] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253060.151] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253109.552] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253109.561] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253153.533] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253203.721] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253204.176] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253251.989] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253296.426] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253359.934] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253360.370] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253413.594] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253508.625] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253508.630] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument
[253509.047] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Invalid
argument

==================================================

This shows a few 'normal' failures from yesterday earlier on. When I came back
from work and turned it on (so hours off), nothing broke... so it looks like
something has changed or there is an unknown trigger.

I can sit on this until it happens again.

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