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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NVE6] MMIO FAULT, black screen on QHD+ K2100M"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76319#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NVE6] MMIO FAULT, black screen on QHD+ K2100M"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76319">bug 76319</a>
from <span class="vcard"><a class="email" href="mailto:d-bugzilla@moens.cc" title="D. Moens <d-bugzilla@moens.cc>"> <span class="fn">D. Moens</span></a>
</span></b>
<pre>Ilia, thank you for your instantaneous reply.
(In reply to <a href="show_bug.cgi?id=76319#c1">comment #1</a>)
<span class="quote">> I think you may be the proud owner of multiple issues, as evidenced by the
> gpu lockup you get down the line.</span >
Thanks, I feel honoured.
<span class="quote">> First off, there's no way that load had those nouveau.debug settings. You
> would have seen a LOT more messages. I'm guessing you looked at some log
> file, and that log file ignores debug-level messages. Try checking in dmesg
> directly.</span >
Full dmesg (with patch applied) attached.
<span class="quote">>
> Secondly, I'm pretty sure there's no way to achieve those resolutions
> without the 540MHz clock frequency provided for by DP1.2 (at least not with
> 24bit color). In core/engine/disp/dport.c:nouveau_dp_train, prepend a 540000
> value in the first position of the bw_list array.</span >
Patched :
$ diff nouveau/nvkm/engine/disp/dport.c.orig nouveau/nvkm/engine/disp/dport.c
276c276
< const u32 bw_list[] = { 270000, 162000, 0 };
---
<span class="quote">> const u32 bw_list[] = { 540000, 270000, 162000, 0 };</span >
<span class="quote">>
> Try to get a full debug log (which should include the various DP debug
> messages, as well as others), with that change, and the nouveau.debug
> settings you were already using (but apparently were either not being picked
> up, or something else).</span >
Oh joy, I now do get a graphical screen (and high-res VT).
Appearantly, I am also bitten by <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NVE6,NVE7] HUB_INIT timeout on graph init, blob fw doesn't help"
href="show_bug.cgi?id=70354">bug #70354</a> (witness errors.out) ?
Please find all logs in attachment (with external monitor detached, for sake of
simplicity).
Again, thank you for your involvement.
Didier</pre>
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