[Bug 100276] xf86-video-amdgpu-1.3.0 segfaults with a rotated screen (regression caused by commit ad53635af1)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100276

--- Comment #5 from timon37 at gmail.com ---
Patch didn't help. Actually it initially didn't compile for me
(AMDGPUWindowExposures_oneshot was undefined) but I added a prototype for it.

Indeed DRI3 didn't seem to affect it on further tries (not sure what happened
originally).

But when I comment out the "Virtual 4096 4096" line it consistently works, and
if then uncomment it it crashes.

To clarify the crash is because pScreen->root is 0. It doesn't crash without
rotation because that's not queried in the else case (I verified that it was
also 0 without screen rotation).

And I'm guessing it's not 0 when the Virtual setting isn't used.
Alternatively the code never reaches that point, I can try to verify that or
anything else you want. Though hopefully you'll be able to repro it now?

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