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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Horizontal lines in radeon driver on kernel 3.15 and upwards"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87682#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Horizontal lines in radeon driver on kernel 3.15 and upwards"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87682">bug 87682</a>
from <span class="vcard"><a class="email" href="mailto:madeforspam@telfort.nl" title="Thom <madeforspam@telfort.nl>"> <span class="fn">Thom</span></a>
</span></b>
<pre>(In reply to Chris Bainbridge from <a href="show_bug.cgi?id=87682#c8">comment #8</a>)
<span class="quote">> This is not correct. The 77/69 does not imply a linear ordering because of
> forks:
> Trust git ;-)</span >
Thanks for the update, that explains everything. I hardly know git, and before
yesterday I didn't even know what git or what bisecting was...it's a bit
overwhelming.
<span class="quote">>
> > c2fb3094669a3205f16a32f4119d0afe40b1a1fd is the first bad commit
>
> Not familiar with this code, but from the patch the PLL values are printed
> out:
>
> DRM_DEBUG_KMS("%d - %d, pll dividers - fb: %d.%d ref: %d, post
> %d\n",
> freq, *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p,
> ref_div, post_div);
> </span >
That is like magic :-) How did you get git to give you the source of that patch
so quickly ?
(I googled for hours on this stuff without success)
<span class="quote">> So suggest enabling debug log and compare those two lines from a working and
> non-working kernel.</span >
>
I assume that I have to enable debug log via a bootoption because I couldn't
find anything in menuconfig that wasn't already marked for inclusion.
What bootoption do I have to use to enable the right (and right amount of)
debug logging ? (and after that, where do I find the log output?)
<span class="quote">> It should also be trivial to checkout a recent tag and revert the bad commit</span >
I don't even know yet what that is or how to do that, even after reading the
man pages about checkout, tag, revert and commit; but I'm convinced I'll get
there in the end ;-)</pre>
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