<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Screen blanks for 2 seconds"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97778">97778</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Screen blanks for 2 seconds
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>pmenzel@molgen.mpg.de
</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>Created <span class=""><a href="attachment.cgi?id=126465" name="attach_126465" title="Output of `dmesg -T`">attachment 126465</a> <a href="attachment.cgi?id=126465&action=edit" title="Output of `dmesg -T`">[details]</a></span>
Output of `dmesg -T`
Using Linux 4.8-rc5, X.Org X Server 1.18.4, and the X modesetting driver, with
a Intel Sky Lake device, using my window manager awesome [1], and change
between tags (imagine virtual desktops), the screen blanked for two seconds.
```
$ lspci -nn -s 0:2.0
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 530
[8086:1912] (rev 06)
```
Linux outputs the following message.
```
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
```
I do not know how to reproduce this.
Here are the listed information from [2].
```
$ uname -m
x86_64
$ uname -r
4.8.0-rc5.mx64.101
$ dmesg | grep DMI:
[ 0.000000] DMI: FUJITSU ESPRIMO_P756/D3401-A1, BIOS V5.0.0.11 R1.13.0 for
D3401-A1x 02/19/2016
```
The monitor is connected over DisplayPort.
```
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
HDMI-1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x42
Timestamp: 65432
Subpixel: unknown
Clones:
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
DP-1 connected 1920x1080+0+0 (0x4c) normal (normal left inverted right x axis y
axis) 698mm x 392mm
Identifier: 0x43
Timestamp: 65432
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones: HDMI-2
CRTC: 0
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff0010ac934050333630
2e170104b54627783a73e0a35336b626
0d5153a54b008100b300d100714fa940
8180d1c00101a36600a0f0701f803020
3500ba882100001a000000ff004b3352
3930334247303633500a000000fc0044
454c4c20555033323134510a000000fd
001d4b1f8c1e000a20202020202001a1
020315b1509005040302071601061112
1513141f2030750030f2705a80b0588a
00ba882100001e023a801871382d4058
2c2500ba882100001e011d8018711c16
20582c2500ba882100009e011d007251
d01e206e285500ba882100001e8c0ad0
8a20e02d10103e9600ba882100001800
00000000000000000000000000000043
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
3840x2160 (0x49) 262.8MHz +HSync -VSync +preferred
h: width 3840 start 3888 end 3920 total 4000 skew 0 clock 65.7KHz
v: height 2160 start 2163 end 2168 total 2191 clock 30.0Hz
3840x2160 (0x4a) 300.0MHz +HSync +VSync
h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 68.2KHz
v: height 2160 start 2168 end 2178 total 2250 clock 30.3Hz
1920x1200 (0x4b) 193.2MHz -HSync +VSync
h: width 1920 start 2056 end 2256 total 2592 skew 0 clock 74.6KHz
v: height 1200 start 1203 end 1209 total 1245 clock 59.9Hz
1920x1080 (0x4c) 148.5MHz +HSync +VSync *current
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz
v: height 1080 start 1082 end 1087 total 1125 clock 60.0Hz
1920x1080 (0x4d) 148.5MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.0Hz
1920x1080 (0x4e) 148.5MHz +HSync +VSync
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.2KHz
v: height 1080 start 1084 end 1089 total 1125 clock 50.0Hz
1920x1080 (0x4f) 148.4MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.4KHz
v: height 1080 start 1084 end 1089 total 1125 clock 59.9Hz
1920x1080i (0x50) 74.2MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.8KHz
v: height 1080 start 1084 end 1094 total 1125 clock 60.1Hz
1920x1080i (0x51) 74.2MHz +HSync +VSync Interlace
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.1KHz
v: height 1080 start 1084 end 1094 total 1125 clock 50.0Hz
1920x1080 (0x52) 74.2MHz +HSync +VSync
h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 27.0KHz
v: height 1080 start 1084 end 1089 total 1125 clock 24.0Hz
1920x1080i (0x53) 74.2MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.7KHz
v: height 1080 start 1084 end 1094 total 1125 clock 60.0Hz
1920x1080 (0x54) 74.2MHz +HSync +VSync
h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 27.0KHz
v: height 1080 start 1084 end 1089 total 1125 clock 24.0Hz
1600x1200 (0x55) 162.0MHz +HSync +VSync
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.0KHz
v: height 1200 start 1201 end 1204 total 1250 clock 60.0Hz
1680x1050 (0x56) 146.2MHz -HSync +VSync
h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 65.3KHz
v: height 1050 start 1053 end 1059 total 1089 clock 60.0Hz
1280x1024 (0x57) 135.0MHz +HSync +VSync
h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 80.0KHz
v: height 1024 start 1025 end 1028 total 1066 clock 75.0Hz
1280x1024 (0x58) 108.0MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 64.0KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.0Hz
1280x800 (0x59) 83.5MHz -HSync +VSync
h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.7KHz
v: height 800 start 803 end 809 total 831 clock 59.8Hz
1152x864 (0x5a) 108.0MHz +HSync +VSync
h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.5KHz
v: height 864 start 865 end 868 total 900 clock 75.0Hz
1280x720 (0x5b) 74.2MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.0KHz
v: height 720 start 725 end 730 total 750 clock 60.0Hz
1280x720 (0x5c) 74.2MHz +HSync +VSync
h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.5KHz
v: height 720 start 725 end 730 total 750 clock 50.0Hz
1280x720 (0x5d) 74.2MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.0KHz
v: height 720 start 725 end 730 total 750 clock 59.9Hz
1024x768 (0x5e) 78.8MHz +HSync +VSync
h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.0KHz
v: height 768 start 769 end 772 total 800 clock 75.0Hz
1024x768 (0x5f) 65.0MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz
v: height 768 start 771 end 777 total 806 clock 60.0Hz
800x600 (0x60) 49.5MHz +HSync +VSync
h: width 800 start 816 end 896 total 1056 skew 0 clock 46.9KHz
v: height 600 start 601 end 604 total 625 clock 75.0Hz
800x600 (0x61) 40.0MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz
v: height 600 start 601 end 605 total 628 clock 60.3Hz
720x576 (0x62) 27.0MHz -HSync -VSync
h: width 720 start 732 end 796 total 864 skew 0 clock 31.2KHz
v: height 576 start 581 end 586 total 625 clock 50.0Hz
720x480 (0x63) 27.0MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.5KHz
v: height 480 start 489 end 495 total 525 clock 60.0Hz
720x480 (0x64) 27.0MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.5KHz
v: height 480 start 489 end 495 total 525 clock 59.9Hz
640x480 (0x65) 31.5MHz -HSync -VSync
h: width 640 start 656 end 720 total 840 skew 0 clock 37.5KHz
v: height 480 start 481 end 484 total 500 clock 75.0Hz
640x480 (0x66) 25.2MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz
v: height 480 start 490 end 492 total 525 clock 60.0Hz
640x480 (0x67) 25.2MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz
v: height 480 start 490 end 492 total 525 clock 59.9Hz
720x400 (0x68) 28.3MHz -HSync +VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 31.5KHz
v: height 400 start 412 end 414 total 449 clock 70.1Hz
HDMI-2 disconnected (normal left inverted right x axis y axis)
Identifier: 0x44
Timestamp: 65432
Subpixel: unknown
Clones: DP-1
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
DP-2 disconnected (normal left inverted right x axis y axis)
Identifier: 0x45
Timestamp: 65432
Subpixel: unknown
Clones: HDMI-3
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
HDMI-3 disconnected (normal left inverted right x axis y axis)
Identifier: 0x46
Timestamp: 65432
Subpixel: unknown
Clones: DP-2
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
DP-3 disconnected (normal left inverted right x axis y axis)
Identifier: 0x47
Timestamp: 65432
Subpixel: unknown
Clones:
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
```
Please find the output of `dmesg` attached. Unfortunately, this system hasn’t
been started with `drm.debug=0xe` to get more information.
[1] <a href="https://awesomewm.org/">https://awesomewm.org/</a>
[2] <a href="https://01.org/linuxgraphics/documentation/how-report-bugs">https://01.org/linuxgraphics/documentation/how-report-bugs</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>