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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90963#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90963">bug 90963</a>
from <span class="vcard"><a class="email" href="mailto:eong.chen@gmail.com" title="Eong Chen <eong.chen@gmail.com>"> <span class="fn">Eong Chen</span></a>
</span></b>
<pre>(In reply to Ander Conselvan de Oliveira from <a href="show_bug.cgi?id=90963#c12">comment #12</a>)
<span class="quote">> (In reply to Eong Chen from <a href="show_bug.cgi?id=90963#c11">comment #11</a>)
> > Created <span class=""><a href="attachment.cgi?id=118986" name="attach_118986" title="full dmesg with Ander Conselvan's patch">attachment 118986</a> <a href="attachment.cgi?id=118986&action=edit" title="full dmesg with Ander Conselvan's patch">[details]</a></span>
> > full dmesg with Ander Conselvan's patch
> >
> > Tried the patch on 4.2.3.
>
> Unfortunately that didn't help. It seems we reach the maximum voltage level
> and the monitor still doesn't reach clock recovery.
>
> I see in the log that DP MST is being used and according to Viktor this
> started failing with 3.17, which introduce MST support, so this is very
> likely related to that.
>
> It seems the race between hpd_pulse and modeset that Ville tried to address
> [1] is triggered, except it doesn't look like there is two concurrent calls
> to intel_dp_start_link_train().
>
> [1] <a href="https://patchwork.freedesktop.org/patch/58114/">https://patchwork.freedesktop.org/patch/58114/</a></span >
I tried this patch on 4.2.3, but it leads to crashes with external monitor.</pre>
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