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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Kernel 4.15-rc2 on Polaris RX 480 with amdgpu.dc=1 has trouble waking up displays after suspend"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104300#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Kernel 4.15-rc2 on Polaris RX 480 with amdgpu.dc=1 has trouble waking up displays after suspend"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104300">bug 104300</a>
from <span class="vcard"><a class="email" href="mailto:mariusz.g.mazur@gmail.com" title="Mariusz Mazur <mariusz.g.mazur@gmail.com>"> <span class="fn">Mariusz Mazur</span></a>
</span></b>
<pre>I found it! Before I knew 4.14 worked fine and 4.15+ introduced this bug.
Now I know precisely which patches:
- 4.14.35 works correctly
- 4.14.36 exhibits this behavior
There are only a few amdgpu patches in there, one by Bas Nieuwenhuizen
@chromium and a few by Alex Deucher @amd. Now I need to figure out how to set
up a kernel-building env and test which patch in particular is the one that
breaks everything.</pre>
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