[PATCH xserver] modesetting: Fix fallback for lack of new vblank kernel API.

[Keith Packard]

Mario Kleiner <mario.kleiner.de at gmail.com> writes:

> Turns out that the kernel DRM ioctl handling returns EINVAL
> instead of ENOTTY if one tries to call the new drmCrtcGetSequence()

Thanks for fixing this. I must have missed testing this...

Reviewed-by: Keith Packard <keithp at keithp.com>

-- 
-keith
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