[Bug 76554] [gm45 regression] [drm:init_ring_common]: *ERROR* render ring initialization failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76554

--- Comment #49 from Chris Wilson <chris at chris-wilson.co.uk> ---
So it passes the immediate check that HEAD is valid after setting CTRL, but
then fails shortly afterwards. Humph. I am not sure what is going on!

I wonder if it is as simple as the combination of reads failing?

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