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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [bisected] kernel 3.7.0-rc1 breaks 6950 (boot/grub2 and suspend/resume) (CAYMAN)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56139#c26">Comment # 26</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [bisected] kernel 3.7.0-rc1 breaks 6950 (boot/grub2 and suspend/resume) (CAYMAN)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56139">bug 56139</a>
from <span class="vcard"><a class="email" href="mailto:alexandre.f.demers@gmail.com" title="Alexandre Demers <alexandre.f.demers@gmail.com>"> <span class="fn">Alexandre Demers</span></a>
</span></b>
<pre>I've been playing with different options in Grub2 and the workaround for the
boot sequence bug, beside reverting commit
62444b7462a2b98bc78d68736c03a7c4e66ba7e2, is to force gfxpayload=text.
I tried many things by changing gfxmode, forcing it to known good values, in
combination with gfxpayload. But whatever I tried, if gfxpayload=keep, it was
not synced correctly (as described, sometimes I had a black screen, some other
times, it is vertically synced but shifted, etc.) As already explained, if I
either revert commit 62444b7462a2b98bc78d68736c03a7c4e66ba7e2 or if I set tmp=0
before WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp), which is
disabling the whole crtc, the boot process is fine.
Also, I tested kernel 3.7.0-rc5 (which contains <span class=""><a href="attachment.cgi?id=69573" name="attach_69573" title="possible fix">attachment 69573</a> <a href="attachment.cgi?id=69573&action=edit" title="possible fix">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=56139&attachment=69573'>[review]</a>). Since it
also contains modified code in evergreen_mc_stop() from commit
62444b7462a2b98bc78d68736c03a7c4e66ba7e2, it crashes on resume. In other words,
<span class=""><a href="attachment.cgi?id=69573" name="attach_69573" title="possible fix">attachment 69573</a> <a href="attachment.cgi?id=69573&action=edit" title="possible fix">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=56139&attachment=69573'>[review]</a> fixes a part of the suspend/resume problem, but doesn't the
part coming from evergreen_mc_stop().
While I can live with working around the boot process/grub2 problem, the
suspend part is really annoying.</pre>
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