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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL]Black screen : no signal from computer"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98567">98567</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SKL]Black screen : no signal from computer
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin.souchal@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>I'm using an external monitor plugged with mDP to my HP EliteBook Folio 1040 G3
laptop.
There is no image at all, the screen is black from boot.
uname :
Linux 4.8.6-1-ARCH #1 SMP PREEMPT Mon Oct 31 18:51:30 CET 2016 x86_64 GNU/Linux
xrandr output :
Screen 0: minimum 8 x 8, current 3840 x 3240, maximum 32767 x 32767
eDP1 connected primary 1920x1080+1044+0 (normal left inverted right x axis y
axis) 310mm x 170mm
1920x1080 60.01*+ 40.00
1400x1050 59.98
1600x900 60.00
1280x1024 60.02
1280x960 60.00
1368x768 60.00
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
640x360 60.00
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP2-1 connected 3840x2160+0+1080 (normal left inverted right x axis y axis)
530mm x 300mm
3840x2160 60.00*+ 29.98
2560x1440 59.95
2048x1280 59.99
1920x1200 59.88
1920x1080 60.00 60.00 50.00 59.94 24.00 23.98
1600x1200 60.00
1600x900 60.00
1280x1024 75.02 60.02
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
DP2-2 disconnected (normal left inverted right x axis y axis)
DP2-3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
dmesg error message :
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
[ 33.096244] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train
DP, aborting
[ 33.681622] fuse init (API version 7.25)
[ 149.138287] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 149.756668] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 150.374918] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 150.993109] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 151.613104] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 152.231252] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 152.849672] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too
many voltage retries, give up
[ 152.849885] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train
DP, aborting
[ 152.858138] [drm:intel_dp_set_idle_link_train [i915]] *ERROR* Timed out
waiting for DP idle patterns
[ 165.458248] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
Thanks</pre>
</div>
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