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nanosleep

Member

From: Nashville, TN

Registered: 2009-06-04

Posts: 11

Website

x1950xtx + radeonhd, randr/edid issues

Salutations everyone, I have a 1680x1050 monitor I know to be working correctly (works at full resolution on other linux boxes), however when on this computer with the radeonhd driver, xrandr only detects modes up to 1024x768 for it.. I've attempted using cvt to generate a valid modeline, to then add to xrandr with --newmode.. however I'm not entirely sure I'm using randr correctly. This is a buddy's computer, and I don't have much experience with using radeon cards under any form of *nix. Most of my experience comes from using ancient cards on ancient hardware, so the seemingly new way of adding modes via randr is blowing my mind.

I am, however, accustomed to using the monitors/screen section of my xorg.conf, and just supplying a mode with "Modes".. however, since something appears to causing the edid to not be detected -- randr is not 'seeing' this mode, so I seem to be out of luck using that method.

I have attempted using cvt to generate a sane modeline for me, and then adding that modeline via xrandr --newmode

Does this seem to look correct? Here's my course of action:

[deadman@FGSFDS ~]$ cvt 1680 1050 60
# 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
Modeline "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync
[deadman@FGSFDS ~]$ xrandr --newmode "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync
[deadman@FGSFDS ~]$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024
DVI-I_1/analog disconnected (normal left inverted right x axis y axis)
DVI-I_1/digital disconnected (normal left inverted right x axis y axis)
TV_SVIDEO disconnected (normal left inverted right x axis y axis)
DVI-I_2/digital connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0* 
   800x600        60.3  
   640x480        59.9  
DVI-I_2/analog disconnected (normal left inverted right x axis y axis)
  1680x1050_60.00 (0x79)  146.2MHz
        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
[deadman@FGSFDS ~]$ xrandr --addmode DVI-I_2/digital 1680x1050_60.00
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  150 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  29
  Current serial number in output stream:  30

I am completely at a loss here. Does anyone have any suggestions or experience dealing with this type of issue? I would really appreciate your help. Thank you!

nanosleep

Member

From: Nashville, TN

Registered: 2009-06-04

Posts: 11

Website

Re: x1950xtx + radeonhd, randr/edid issues

It turns out I am indeed complete idiot. Due to lack of sleep, and a line that I'd had in the xorg.conf, it was failing to detect the modes.

For those interested, for some reason I had the option "NoDDC" set to true in the Device section.
Commented it out.. works perfectly
thanks anyway