Bug#608130: Failed monitor detection on VGA port with Radeon HD 4350 (was: Bug#608130: [squeeze] [beta2] [i386] Installation report: d-i worked, X has problems with monitor detection)
On Tue, Dec 28, 2010 at 04:47:25PM +0100, Julien Cristau wrote:
> On Tue, Dec 28, 2010 at 15:44:23 +0100, Karsten Merker wrote:
>
> > [Installation report for Squeeze Beta 2; installation itself works ok, but X
> > starts in wrong mode (1024x768 instead of 1920x1080 on a 1920x1080 TFT) due
> > to failed DDC detection on the VGA port of a Radeon HD 4350; DDC detection on
> > the DVI-D port works as expected]
> >
> Please provide the output of xrandr --verbose with the monitor attached
> to VGA, and when attached to DVI. Also attach the contents of
> /sys/class/drm/card0-*/edid
With the display attached to the VGA connector, /sys/class/drm/card0-*/edid
are all empty.
xrandr --verbose on the VGA connector results in
-----8<----------8<----------8<----------8<----------8<----------8<-----
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
VGA-0 connected 1024x768+0+0 (0x46) normal (normal left inverted right x axis y axis) 0mm x 0mm
Identifier: 0x41
Timestamp: 52209
Subpixel: no subpixels
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
load detection: 1 (0x00000001) range: (0,1)
1360x768 (0x45) 84.8MHz -HSync +VSync
h: width 1360 start 1432 end 1568 total 1776 skew 0 clock 47.7KHz
v: height 768 start 771 end 781 total 798 clock 59.8Hz
1024x768 (0x46) 65.0MHz -HSync -VSync *current
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 (0x47) 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 (0x48) 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
848x480 (0x49) 33.8MHz +HSync +VSync
h: width 848 start 864 end 976 total 1088 skew 0 clock 31.0KHz
v: height 480 start 486 end 494 total 517 clock 60.0Hz
640x480 (0x4a) 25.2MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz
v: height 480 start 489 end 492 total 525 clock 59.9Hz
640x480 (0x4b) 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
VGA-1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x42
Timestamp: 52209
Subpixel: no subpixels
Clones:
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
load detection: 1 (0x00000001) range: (0,1)
HDMI-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x43
Timestamp: 52209
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
coherent: 1 (0x00000001) range: (0,1)
DVI-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x44
Timestamp: 52209
Subpixel: horizontal rgb
Clones:
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
load detection: 1 (0x00000001) range: (0,1)
coherent: 1 (0x00000001) range: (0,1)
-----8<----------8<----------8<----------8<----------8<----------8<-----
With the display attached to the DVI connector, /sys/class/drm/card0-*/edid
are all empty except for /sys/class/drm/card0-DVI-I-1/edid, which contains the
following data (piped through parse-edid):
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
Identifier "SMB2430L"
VendorName "SAM"
ModelName "SMB2430L"
# Block type: 2:0 3:fd
HorizSync 30-81
VertRefresh 56-75
# Max dot clock (video bandwidth) 170 MHz
# Block type: 2:0 3:fc
# Block type: 2:0 3:ff
# DPMS capabilities: Active off:yes Suspend:no Standby:no
Mode "1920x1080" # vfreq 60.000Hz, hfreq 67.500kHz
DotClock 148.500000
HTimings 1920 2008 2052 2200
VTimings 1080 1084 1089 1125
Flags "+HSync" "+VSync"
EndMode
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
# Block type: 2:0 3:ff
EndSection
Regards,
Karsten
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