[Bug 81681] Corruption/artifacting at various times ('wake' from blank; initial boot)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81681

--- Comment #8 from Nathan Schulte <nmschulte at gmail.com> ---
(In reply to comment #5)
> Can you please first test with xf86-video-intel-2.99.914?

This seems to fix the issue for unblanking corruption.  However, it seems DRI
PRIME is now broken; `xrandr --setprovideroffloadsink ...` seems to have no
effect: running `LIBGL_DEBUG=verbose DRI_PRIME=1 glxinfo` shows the i915 driver
infos.  As well, when I run the xrandr command, before the desktop background
would "flicker" (render the solid chosen color, then the wallpaper on top) as
it does when I first login, now it does not.

(In reply to comment #7)
> That is a different form of corruption resulting from the BIOS reading out
> of memory that we overwrite for use by our GTT. That is fixed in 3.15 (and
> technically a regression from about 3.2).

Alright, good to know.  I will verify it is gone in the packaged 3.15/16
kernels.

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