<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - EDID not read, results in flickering monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56111">56111</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>EDID not read, results in flickering monitor
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>darxus@chaosreigns.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>General
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=68741" name="attach_68741" title="Ubuntu Oneric dmesg output, not having this problem">attachment 68741</a> <a href="attachment.cgi?id=68741&action=edit" title="Ubuntu Oneric dmesg output, not having this problem">[details]</a></span>
Ubuntu Oneric dmesg output, not having this problem
Debian bug: <a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690794">http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690794</a>
Ubuntu bug, possibly the same, fixed, but I don't know how:
<a href="https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/958439">https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/958439</a>
Installed Debian Wheezy, then installed package linux-image-3.5-trunk-amd64
from Experimental, which I guess is an unmodified mainline kernel:
$ uname -a
Linux dancer 3.5-trunk-amd64 #1 SMP Debian 3.5.5-1~experimental.1 x86_64
GNU/Linux
EDID is not read properly, resulting in (CRT) monitor flickering (looks like
60hz).
gnome-control-center says the display is "Unknown".
xrandr --verbose does not mention the EDID.
I previously had these problems on Ubuntu, reported in the above Ubuntu bug.
It persisted when I changed video cards from Nvidia to AMD Radeon. It went
away with a kernel upgrade. Not sure what the change was.
"xrandr --verbose" output:
-------------------------------------------------------------------------
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 400, current 1600 x 1200, maximum 1920 x 1440
default connected 1600x1200+0+0 (0x13b) normal (normal) 0mm x 0mm
Identifier: 0x137
Timestamp: 40607
Subpixel: no subpixels
Clones:
CRTC: 0
CRTCs: 0
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
1920x1440 (0x138) 0.0MHz
h: width 1920 start 0 end 0 total 1920 skew 0 clock 0.0KHz
v: height 1440 start 0 end 0 total 1440 clock 0.0Hz
1856x1392 (0x139) 0.0MHz
h: width 1856 start 0 end 0 total 1856 skew 0 clock 0.0KHz
v: height 1392 start 0 end 0 total 1392 clock 0.0Hz
1792x1344 (0x13a) 0.0MHz
h: width 1792 start 0 end 0 total 1792 skew 0 clock 0.0KHz
v: height 1344 start 0 end 0 total 1344 clock 0.0Hz
1600x1200 (0x13b) 0.0MHz *current
h: width 1600 start 0 end 0 total 1600 skew 0 clock 0.0KHz
v: height 1200 start 0 end 0 total 1200 clock 0.0Hz
1280x1024 (0x13c) 0.0MHz
h: width 1280 start 0 end 0 total 1280 skew 0 clock 0.0KHz
v: height 1024 start 0 end 0 total 1024 clock 0.0Hz
1152x864 (0x13d) 0.0MHz
h: width 1152 start 0 end 0 total 1152 skew 0 clock 0.0KHz
v: height 864 start 0 end 0 total 864 clock 0.0Hz
1024x768 (0x13e) 0.0MHz
h: width 1024 start 0 end 0 total 1024 skew 0 clock 0.0KHz
v: height 768 start 0 end 0 total 768 clock 0.0Hz
800x600 (0x13f) 0.0MHz
h: width 800 start 0 end 0 total 800 skew 0 clock 0.0KHz
v: height 600 start 0 end 0 total 600 clock 0.0Hz
640x480 (0x140) 0.0MHz
h: width 640 start 0 end 0 total 640 skew 0 clock 0.0KHz
v: height 480 start 0 end 0 total 480 clock 0.0Hz
720x400 (0x141) 0.0MHz
h: width 720 start 0 end 0 total 720 skew 0 clock 0.0KHz
v: height 400 start 0 end 0 total 400 clock 0.0Hz
-------------------------------------------------------------------------
"get-edid 2>&1 | parse-edid > get-parse-edid.txt 2>&1" output:
-------------------------------------------------------------------------
parse-edid: parse-edid version 2.0.0
parse-edid: EDID checksum failed - data is corrupt. Continuing anyway.
parse-edid: first bytes don't match EDID version 1 header
parse-edid: do not trust output (if any).
# EDID version 32 revision 118
Section "Monitor"
Identifier "NQ@:6765"
VendorName "NQ@"
ModelName "NQ@:6765"
# DPMS capabilities: Active off:yes Suspend:yes Standby:no
Mode "1110x1568" # vfreq 17.559Hz, hfreq 33.766kHz
DotClock 82.930000
HTimings 1110 1218 1326 2456
VTimings 1568 1600 1626 1923
EndMode
Mode "884x888" # vfreq 335.422Hz, hfreq 314.290kHz
DotClock 287.890000
HTimings 884 916 1029 916
VTimings 888 943 967 937
EndMode
Mode "888x632" # vfreq 389.264Hz, hfreq 264.700kHz
DotClock 251.200000
HTimings 888 987 1107 949
VTimings 632 635 648 680
EndMode
Mode "1652x1902" # vfreq 16.831Hz, hfreq 45.478kHz
DotClock 254.540000
HTimings 1652 1769 1881 5597
VTimings 1902 1957 2005 2702
EndMode
EndSection
-------------------------------------------------------------------------
Output of "xrandr --verbose" on Ubuntu Oneric, which does not have this
problem:
-------------------------------------------------------------------------
Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x55
Timestamp: 32750
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1 2 3 4 5
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
underscan vborder: 0 (0x00000000) range: (0,128)
underscan hborder: 0 (0x00000000) range: (0,128)
underscan: off
supported: off on auto
coherent: 1 (0x00000001) range: (0,1)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x56
Timestamp: 32750
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1 2 3 4 5
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
underscan vborder: 0 (0x00000000) range: (0,128)
underscan hborder: 0 (0x00000000) range: (0,128)
underscan: off
supported: off on auto
coherent: 1 (0x00000001) range: (0,1)
HDMI-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x57
Timestamp: 32750
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1 2 3 4 5
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
underscan vborder: 0 (0x00000000) range: (0,128)
underscan hborder: 0 (0x00000000) range: (0,128)
underscan: off
supported: off on auto
coherent: 1 (0x00000001) range: (0,1)
DVI-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x58
Timestamp: 32750
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1 2 3 4 5
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
underscan vborder: 0 (0x00000000) range: (0,128)
underscan hborder: 0 (0x00000000) range: (0,128)
underscan: off
supported: off on auto
coherent: 1 (0x00000001) range: (0,1)
DVI-1 connected 1600x1200+0+0 (0x5a) normal (normal left inverted right x axis
y axis) 390mm x 290mm
Identifier: 0x59
Timestamp: 32750
Subpixel: horizontal rgb
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1 2 3 4 5
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff005a6309e801010101
260d01031d281ec0eacc58a054479925
0f484cffff80a94f81996159714fc14f
c940d140e140a659403062b0324040c0
130086221100001e000000ff0034324b
3033333830303333350a000000fd0032
b41e6e1a000a202020202020000000fc
004732323066620a20202020202000df
load detection: 1 (0x00000001) range: (0,1)
underscan vborder: 0 (0x00000000) range: (0,128)
underscan hborder: 0 (0x00000000) range: (0,128)
underscan: off
supported: off on auto
coherent: 1 (0x00000001) range: (0,1)
1600x1200 (0x5a) 229.5MHz +HSync +VSync *current +preferred
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 106.2KHz
v: height 1200 start 1201 end 1204 total 1250 clock 85.0Hz
2048x1536 (0x5b) 267.0MHz -HSync +VSync
h: width 2048 start 2200 end 2424 total 2800 skew 0 clock 95.4KHz
v: height 1536 start 1537 end 1540 total 1589 clock 60.0Hz
1920x1440 (0x5c) 234.0MHz -HSync +VSync
h: width 1920 start 2048 end 2256 total 2600 skew 0 clock 90.0KHz
v: height 1440 start 1441 end 1444 total 1500 clock 60.0Hz
1856x1392 (0x5d) 218.2MHz -HSync +VSync
h: width 1856 start 1952 end 2176 total 2528 skew 0 clock 86.3KHz
v: height 1392 start 1393 end 1396 total 1439 clock 60.0Hz
1792x1344 (0x5e) 261.0MHz -HSync +VSync
h: width 1792 start 1888 end 2104 total 2456 skew 0 clock 106.3KHz
v: height 1344 start 1345 end 1348 total 1417 clock 75.0Hz
1600x1200 (0x5f) 202.5MHz +HSync +VSync
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 93.8KHz
v: height 1200 start 1201 end 1204 total 1250 clock 75.0Hz
1280x1024 (0x60) 157.5MHz +HSync +VSync
h: width 1280 start 1344 end 1504 total 1728 skew 0 clock 91.1KHz
v: height 1024 start 1025 end 1028 total 1072 clock 85.0Hz
1280x1024 (0x61) 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
1152x864 (0x62) 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
1024x768 (0x63) 94.5MHz +HSync +VSync
h: width 1024 start 1072 end 1168 total 1376 skew 0 clock 68.7KHz
v: height 768 start 769 end 772 total 808 clock 85.0Hz
1024x768 (0x64) 78.8MHz +HSync +VSync
h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.1KHz
v: height 768 start 769 end 772 total 800 clock 75.1Hz
1024x768 (0x65) 75.0MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.5KHz
v: height 768 start 771 end 777 total 806 clock 70.1Hz
1024x768 (0x66) 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
1024x768 (0x67) 44.9MHz +HSync +VSync Interlace
h: width 1024 start 1032 end 1208 total 1264 skew 0 clock 35.5KHz
v: height 768 start 768 end 776 total 817 clock 43.5Hz
832x624 (0x68) 57.3MHz -HSync -VSync
h: width 832 start 864 end 928 total 1152 skew 0 clock 49.7KHz
v: height 624 start 625 end 628 total 667 clock 74.6Hz
800x600 (0x69) 50.0MHz +HSync +VSync
h: width 800 start 856 end 976 total 1040 skew 0 clock 48.1KHz
v: height 600 start 637 end 643 total 666 clock 72.2Hz
800x600 (0x6a) 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 (0x6b) 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
800x600 (0x6c) 36.0MHz +HSync +VSync
h: width 800 start 824 end 896 total 1024 skew 0 clock 35.2KHz
v: height 600 start 601 end 603 total 625 clock 56.2Hz
640x480 (0x6d) 31.5MHz -HSync -VSync
h: width 640 start 664 end 704 total 832 skew 0 clock 37.9KHz
v: height 480 start 489 end 491 total 520 clock 72.8Hz
640x480 (0x6e) 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 (0x6f) 30.2MHz -HSync -VSync
h: width 640 start 704 end 768 total 864 skew 0 clock 35.0KHz
v: height 480 start 483 end 486 total 525 clock 66.7Hz
640x480 (0x70) 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
720x400 (0x71) 35.5MHz -HSync -VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 39.4KHz
v: height 400 start 421 end 423 total 449 clock 87.8Hz
720x400 (0x72) 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
-------------------------------------------------------------------------
Output of "get-edid 2>&1 | parse-edid > get-parse-edid.txt 2>&1" on
Ubuntu Oneric:
-------------------------------------------------------------------------
parse-edid: parse-edid version 2.0.0
parse-edid: EDID checksum failed - data is corrupt. Continuing anyway.
parse-edid: first bytes don't match EDID version 1 header
parse-edid: do not trust output (if any).
# EDID version 32 revision 118
Section "Monitor"
Identifier "NQ@:6765"
VendorName "NQ@"
ModelName "NQ@:6765"
# DPMS capabilities: Active off:yes Suspend:yes Standby:no
Mode "623x1902" # vfreq 121.269Hz, hfreq 368.295kHz
DotClock 269.960000
HTimings 623 671 783 733
VTimings 1902 1908 1945 3037
EndMode
Mode "613x1637" # vfreq 16.090Hz, hfreq 65.018kHz
DotClock 263.780000
HTimings 613 729 787 4057
VTimings 1637 1655 1671 4041
EndMode
Mode "1652x1900" # vfreq 48.351Hz, hfreq 134.078kHz
DotClock 269.900000
HTimings 1652 1757 1867 2013
VTimings 1900 1906 1913 2773
EndMode
Mode "1568x1908" # vfreq 19.585Hz, hfreq 49.374kHz
DotClock 259.560000
HTimings 1568 1686 1783 5257
VTimings 1908 1930 1949 2521
EndMode
EndSection
-------------------------------------------------------------------------
Oneric kernel is:
$ uname -a
Linux dancer 3.0.0-26-generic #43-Ubuntu SMP Tue Sep 25 17:19:22 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux</pre>
</div>
</p>
<hr>
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<ul>
<li>You are the assignee for the bug.</li>
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