https://bugzilla.novell.com/show_bug.cgi?id=775048
https://bugzilla.novell.com/show_bug.cgi?id=775048#c11
--- Comment #11 from Stefan Dirsch 2012-08-10 09:21:07 UTC ---
Adding the fix alone is no big deal, but ...
... well, there are other relevant and important fixes/improvements since
xf86-video-intel 2.20.0 like
- "Perhaps a little more wildly felt, I hope!, will be that the SNA
fallbacks were broken on 64-bit machines if they required clipping."
- A bug affecting gen4 handling of trapezoids was fixed, and CPU
overhead reduced.
https://bugs.freedesktop.org/show_bug.cgi?id=52158
- A fix for a bug causing corruption of a DRI2 unredirected client
window that was resized whilst under a compositor.
- Improvement to the composite performance on GT2 SandyBridge and
IvyBridge devices, in particular the render copy is significantly
improved.
- Improved handling for when acceleration is disabled, including
permitting DRI2 to remain supported even if the X server believes
the GPU wedged.
- Shadow support was dropped from UXA as it was neither complete nor
correct, use SNA instead.
- Support for the gmux backlight controller on Apple laptops
https://bugs.freedesktop.org/show_bug.cgi?id=52423
- A crash in SNA when repeatedly switching xrandr rotations
- Corruption in SNA observed in kwin on IvyBridge
https://bugs.freedesktop.org/show_bug.cgi?id=52473
- "Just a minor bugfix for gen4 chipsets (965gm, gm45 and friends) that
crept into 2.20.2. As an added bonus, the pessimistic workaround for a
GPU hang on gen4 has been relaxed and the shaders have been overhauled
which should pave the way to eliminating the last of the uncommon CPU
operations, along with immediately realising a small perforamnce
improvement."
- Update DPMS bookkeeping after modeset
https://bugs.freedesktop.org/show_bug.cgi?id=52142
- Avoid overlapping gpu/cpu damage after ignoring cpu damage in the
consideration of placement for the operation.
- Enable acceleration by default on 830gm/845g. The GMCH on this pair
of chipsets is notoriously incoherent, so the GPU is almost certainly
going to hang at some point, though unlikely to hang the system and
should automatically disable acceleration (and thence behave
identically as if the acceleration was disabled from the start).
Option "NoAccel" can be used to disable all 2D acceleration and
Option "DRI" can be used to disable all 3D acceleration.
https://bugs.freedesktop.org/show_bug.cgi?id=52624
- Fix vertex bookkeeping for gen4 that was causing corruption in the
command stream.
Note, that we still use UXA as default 2D acceleration, but users begin to
play around with SNA, so these fixes are relevant, too.
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