Bug 56111

Summary: EDID not read, results in flickering monitor
Product: DRI Reporter: Darxus <darxus>
Component: GeneralAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED INVALID QA Contact:
Severity: normal    
Priority: medium CC: darxus, jrnieder
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Ubuntu Oneric dmesg output, not having this problem
none
Debian dmesg output, which does have this problem none

Description Darxus 2012-10-18 01:40:03 UTC 
Created attachment 68741 [details]
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
Comment 1 Darxus 2012-10-18 01:47:55 UTC 
Created attachment 68742 [details]
Debian dmesg output, which does have this problem
Comment 2 Michel Dänzer 2012-10-18 07:16:07 UTC 
(In reply to comment #1)
> Created attachment 68742 [details]
> Debian dmesg output, which does have this problem
[...]
> [    5.773063] ni_cp: Failed to load firmware "radeon/BARTS_pfp.bin"
> [    5.773113] [drm:evergreen_startup] *ERROR* Failed to load firmware!

Is the firmware-linux-nonfree package installed on Debian Wheezy?
Comment 3 Darxus 2012-10-18 13:27:20 UTC 
(In reply to comment #2)
> Is the firmware-linux-nonfree package installed on Debian Wheezy?

No, it was not.  

Installing this package appears to have solved my problem, thanks.

gnome-control-center is no-longer listing my monitor as "Unknown", but appropriately as "Viewsonic [something].

It's too painfully backlit by the sun at this time of day to be sure it's not flickering, but based on previous experience I'm confident it's not.

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