[Bug 33867] [bisected] Graphics corruption related to pageflip ioctl support in 2.6.38-rc*

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33867

--- Comment #8 from Dave Witbrodt <dawitbro at sbcglobal.net> 2011-02-05 11:56:24 PST ---
(In reply to comment #7)
> When you bisect, you want to focus on only the specific bug you are tracking. 
> If you hit some other bug or the status of the commit is indeterminate, don't
> mark the commit as bad, skip it (git bisect skip).  Also, if you may need to
> have a certain patch applied all the time for testing certain things.  E.g., if
> you get hangs without 1e644d6dce366a7bae22484f60133b61ba322911 applied, make a
> patch of that commit and manually re-apply it before testing each commit in the
> bisect.  E.g., create a patch from the commit:
> git show 1e644d6dce366a7bae22484f60133b61ba322911 > fix.patch
> then before each test in the bisect, manually apply the patch:
> patch -p1 -i fix.patch

Thanks, Alex.  Does this mean you think it would be helpful if I did that
bisect again?  Or is it already clear that after the "pageflip" and "TTM"
series are finished (both in my cherry-pick kernel and in the drm-fixes bisect)
that the kernels work (without locking 'prboom-plus') but cause xf86-video-ati
(after f9bbb26) to produce the black melt animation?  It seems like the only
thing another bisect would clarify is whether the "pageflip" series or the
"TTM" series causes the problem; combined with using an older, pre-pageflip
radeon driver, it seems like the problem is narrowed down to pageflip code...
either in DRM or in xf86-video-ati.


Anyway, when I made my 2.6.37 + cherry-picks kernel, I did a cherry-pick on
1e644d6d first.  (I mentioned that in the original report; it was numbered step
3.)

When I bisected drm-fixes, I did have to manually apply the 1e644d6d commit as
a patch; indeed, I had tested that patch in another bug report here in January,
and it still has the file name you provided for it:

    0001-drm-radeon-kms-re-emit-full-context-state-for-evergr.patch

DW

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