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SubjectRe: rc6 keeps hanging and blanking displays where rc4-mm1 works fine.

On Fri, 12 Aug 2005, Helge Hafting wrote:
> > at the moment. The setup is fine with 2.6.13-rc4-mm1 x86-64, no
> > problems there.
> The problem still exists in 2.6.13-rc6. Usually, all I get is a
> suddenly black display, solveable by resizing.

Is there any chance you could try bisecting the problem? Either just
binary-searching the patches or by using the git bisect helper scripts?

Obviously the git approach needs a "good" kernel in git, but if
2.6.13-rc4-mm1 is ok, then I assume that 2.6.13-rc4 is ok too? That's a
fair number of changes:

git-rev-list v2.6.13-rc4..v2.6.13-rc6 | wc
340 340 13940

but if you can tighten it up a bit (you already had trouble at rc5, I
think), it shouldn't require testing more than a few kernels.

Git has had bisection support for a while, but the helper scripts to use
it sanely are fairly new, so I think you'd need the git-0.99.4 release for
those. But then you'd just do

git bisect start
git bisect bad v2.6.13-rc5
git bisect good v2.6.13-rc4

and start bisecting (that will check out a mid-way point automatically,
you build it, and then do "git bisect bad" or "git bisect good" depending
on whether the result is bad or good - it will continue to try to find
half-way points until it has found the point that turns from good to

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