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<body><span class="vcard"><a class="email" href="mailto:b.bellec@gmail.com" title="Benjamin Bellec <b.bellec@gmail.com>"> <span class="fn">Benjamin Bellec</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - displayport link training fails on certain panels (channel equalization fails)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=27314">bug 27314</a>
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<td>b.bellec@gmail.com
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - displayport link training fails on certain panels (channel equalization fails)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=27314#c72">Comment # 72</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - displayport link training fails on certain panels (channel equalization fails)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=27314">bug 27314</a>
from <span class="vcard"><a class="email" href="mailto:b.bellec@gmail.com" title="Benjamin Bellec <b.bellec@gmail.com>"> <span class="fn">Benjamin Bellec</span></a>
</span></b>
<pre>I bought a new screen and it looks like I have the same issue.
Hardware is:
GPU: Radeon HD5850 (1GB)
Screen: Dell U2414H
Connection: DisplayPort (GPU) / MiniDisplayPort (Screen)
Software is:
Fedora 23 (64-bit)
Kernel 4.2.8
At Fedora loading my screens got no more signal and enter in sleep mode. If I
unplug and replug the DisplayPort cable the screen connection is recovered.
The log shows these 2 messages:
[drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed: 5 tries
[drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed</pre>
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