[Bug 89980] [Regression] Graphical corruption after resuming from suspend (w/ dual monitor configuration)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89980

--- Comment #9 from falaca at gmail.com ---
(In reply to Michel Dänzer from comment #8)
> (In reply to falaca from comment #0)
> > I can only reproduce this with when I have 2 displays connected. My primary
> > screen is set to 2560x1440, and the secondary screen in portrait mode is set
> > to 1200x1920 on the left-hand side. I have the landscape monitor centered
> > with respect to the portrait one, so y = 240 in ~/.config./monitors.xml.
> > 
> > I cannot observe the bug when both screens are aligned at the top, i.e.,
> > with y=0 in ~/.config/monitors.xml.
> 
> Have you tried moving the landscape monitor to y = 0 and back to y = 240
> after suspend/resume, while the session is up? Does that fix the problem, or
> does it stay corrupted?

I just tried right now, and it doesn't make a difference. But you know what, it
turns out that it still *does* happen when y=0, it's just that it's a little
less noticeable to me, e.g., I'm having trouble seeing it when maximizing a
window, but I'm still seeing it happen in the menus. This is purely based on my
eyesight, so it's hardly scientific, but I could make more videos if desired.

I tried to move my landscape screen further up (above the portrait one, but
still overlapping, so I presume that would be y=0 for the landscape screen, but
y= positive for the portrait screen). That resulted in X becoming unusable. My
landscape screen turned white, and restarting X didn't make things much better
- I just got an unusable tiled pattern:
https://www.dropbox.com/s/sfrxv4owqchyq75/tiledpattern.jpg?dl=0

I rebooted and tried with linux 3.16, and also with Arch Linux + Gnome 3 +
linux 3.19 (or maybe it was 4.0). Same result (white screen). So unfortunately
I wasn't able to test out what would happen in that scenario.

Is there anybody else who can test this configuration (dual monitors with a
portrait display)? It seems like it doesn't take much effort to break
something.

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