[Bug 61457] [Intel G45] Screen turns blank when terminating a low res X server on a different low res KMS mode.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61457

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
I would have thought you needed the I915_WRITE(CURBASE, I915_READ(CURBASE))
before the wait_for_vblank() as well. Just try that for sanity's sake, but
otherwise it looks like an acceptably minimal w/a.

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