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<body><span class="vcard"><a class="email" href="mailto:quozl@laptop.org" title="James Cameron <quozl@laptop.org>"> <span class="fn">James Cameron</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - iMac11,1 (RV770/M98L [Mobility Radeon HD 4850]) needs nomodeset to boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98046">bug 98046</a>
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<td style="text-align:right;">CC</td>
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<td>quozl@laptop.org
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - iMac11,1 (RV770/M98L [Mobility Radeon HD 4850]) needs nomodeset to boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98046#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - iMac11,1 (RV770/M98L [Mobility Radeon HD 4850]) needs nomodeset to boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98046">bug 98046</a>
from <span class="vcard"><a class="email" href="mailto:quozl@laptop.org" title="James Cameron <quozl@laptop.org>"> <span class="fn">James Cameron</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=130894" name="attach_130894" title="dmesg of first failed commit">attachment 130894</a> <a href="attachment.cgi?id=130894&action=edit" title="dmesg of first failed commit">[details]</a></span>
dmesg of first failed commit
Same with another iMac11,1, but no firmware update. Kernels before 3.14 are
fine. Kernels from 3.14 show blank display or sometimes flickering horizontal
lines.
I've done a git bisect and first failing commit is
32167016076f714f0e35e287fbead7de0f1fb179 "drm/radeon: rework finding display
PLL numbers v2" by Christian König.
Happy to test kernels or enable debugging, let me know.</pre>
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