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<body><span class="vcard"><a class="email" href="mailto:johannes@sipsolutions.net" title="Johannes Berg <johannes@sipsolutions.net>"> <span class="fn">Johannes Berg</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - two external screens permanently go blank on HP EliteBook Folio G1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108462">bug 108462</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - two external screens permanently go blank on HP EliteBook Folio G1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108462#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - two external screens permanently go blank on HP EliteBook Folio G1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108462">bug 108462</a>
from <span class="vcard"><a class="email" href="mailto:johannes@sipsolutions.net" title="Johannes Berg <johannes@sipsolutions.net>"> <span class="fn">Johannes Berg</span></a>
</span></b>
<pre>FWIW, I don't actually know of a way of *triggering* this. It seems to just
happen all by itself, sometimes with lots of screen activity, sometimes with
none at all.
I noticed that this message *sometimes* seems to coincide with the issue:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO
underrun
but I suppose that's just be a symptom of the issue, rather than the cause,
since it doesn't *always* happen.
Your script doesn't actually work:
jberg1-mobl2:/sys/kernel/debug/dri/0# for plane in pri cur spr; do
<span class="quote">> cat i915_${plane}_wm_latency
> wm0=$(head -1 i915_${plane}_wm_latency|cut -d' ' -f2)
> echo $wm0 1000 1000 1000 1000 > i915_${plane}_wm_latency
> done</span >
WM0 2 (2.0 usec)
WM1 19 (19.0 usec)
WM2 28 (28.0 usec)
WM3 32 (32.0 usec)
WM4 63 (63.0 usec)
WM5 77 (77.0 usec)
WM6 83 (83.0 usec)
WM7 99 (99.0 usec)
bash: echo: write error: Invalid argument
WM0 2 (2.0 usec)
WM1 19 (19.0 usec)
WM2 28 (28.0 usec)
WM3 32 (32.0 usec)
WM4 63 (63.0 usec)
WM5 77 (77.0 usec)
WM6 83 (83.0 usec)
WM7 99 (99.0 usec)
bash: echo: write error: Invalid argument
WM0 2 (2.0 usec)
WM1 19 (19.0 usec)
WM2 28 (28.0 usec)
WM3 32 (32.0 usec)
WM4 63 (63.0 usec)
WM5 77 (77.0 usec)
WM6 83 (83.0 usec)
WM7 99 (99.0 usec)
bash: echo: write error: Invalid argument</pre>
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