[Bug 236003] x11-drivers/xf86-video-intel: update to 2019-12-09 snapshot and refactor

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236003

Jan Beich <jbeich at FreeBSD.org> changed:

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--- Comment #47 from Jan Beich <jbeich at FreeBSD.org> ---
Created attachment 213793
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=213793&action=edit
v8

- More upstream SNA bugfixes

(In reply to Taku YAMAMOTO from comment #46)
> It appears that Xorg begins either spinning inside drm ioctl or
> hopping U-K back and forth after massive texture operations.

Does it happen as soon as Xorg is started? If not which application causes it.
Can you attach ktrace(1) or truss(1) and try decode the ioctl Xorg invokes in a
busy loop?
What's U-K? What do you mean by hopping? CPU usage spikes in top(1)?
Did you see anything unusual in Xorg.log? Mainly look for (EE) lines.
Does enablig DRI3 in xorg.conf help? xf86-video-intel defaults to DRI2 unlike
modesetting.

For me xf86-video-intel works fine as it did months ago.

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