https://bugs.freedesktop.org/show_bug.cgi?id=56111

Priority: medium Bug ID: 56111 Assignee: dri-devel@lists.freedesktop.org Summary: EDID not read, results in flickering monitor Severity: normal Classification: Unclassified OS: All Reporter: darxus@chaosreigns.com Hardware: Other Status: NEW Version: unspecified Component: General Product: DRI

Created attachment 68741 --> https://bugs.freedesktop.org/attachment.cgi?id=68741&action=edit Ubuntu Oneric dmesg output, not having this problem

Debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690794 Ubuntu bug, possibly the same, fixed, but I don't know how: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/958439

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