[Bug 105902] Closing and repoening laptop lid causes scanout corruption (regression since 4.15.12)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105902

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
Fwiw, this was one of my favourite bugs from yesteryear (on ctg, thinkpad
x200s) with the flickering starting exactly on the same line as the cursor; we
had screwed up the WM calculations in conjunction with FBC. I recall we
disabled FBC...

We are indeed using FBC again. So one thing you can do to confirm this WM / FBC
interaction is to boot with i915.enable_fbc=0

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