http://bugs.freedesktop.org/show_bug.cgi?id=22852

           Summary: [r300 KMS] modesetting not accepted by monitor
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: aelschur...@hotmail.com


Created an attachment (id=27849)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=27849)
dmesg. At 10000s I switched from 6.12.2 driver to 6.12.99

Using kernel modesetting, one of my two monitors does not accept any mode set
via xrandr, nor does it accept the default mode set during boot. The other
monitor works fine, but xrandr shows less modes than with an older driver.

--

I'm currently testing the radeon modesetting features on my Radeon 9550. My
system has X.org from Debian unstable, a manually-compiled Linux kernel with
kms enabled, and Radeon drivers from the Ubuntu PPA xorg-edgers/radeon-kms
(https://launchpad.net/~xorg-edgers/+archive/radeon-kms).

relevant package versions:
xserver-xorg-core                          2:1.6.2-1
xserver-xorg-video-ati                     1:6.12.99+git20090719
xserver-xorg-video-radeon                  1:6.12.99+git20090719
libdrm2                                    2.4.12+git20090717
libdrm-radeon1                             2.4.12+git20090717
libgl1-mesa-dri                            7.6.0~git20090715
linux-image-2.6.31-rc3                     2.6.31-rc3-10.00.Custom


Reverting to the 6.12.2 driver from Debian unstable brings the second monitor
back to life. The modelines generated by both drivers appear identical, but in
the radeon-kms case, I get the following lines in /var/log/kern.log:

Jul 20 15:35:37 neminis kernel: [13998.608038] [drm] TMDS-8: set mode  35
Jul 20 15:36:16 neminis kernel: [14036.829106] [drm] TMDS-8: set mode  41

The monitor does flicker on and off when I switch between xrandr --off and
xrandr --auto, so the port appears correct. I'm running without xorg.conf, so
everything is auto-detected.


I'll attach both Xorg logs in a minute. But as for the video modes, XRandr
doesn't agree either (VGA-0 = working, DVI-0 = modes not accepted by monitor):


==> xrandr-6.12.2 <==
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1920 x 1920
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 340mm
x 270mm
   1280x1024      75.0*+   60.0  
   1152x864       75.0  
   1024x768       75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     59.9  
   720x400        70.1  
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 521mm
x 293mm
   1920x1080      60.0 +
   1680x1050      59.9  
   1280x1024      75.0     60.0* 
   1440x900       75.0     59.9  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     59.9  

==> xrandr-6.12.99 <==
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 340mm
x 270mm
   1280x1024      75.0*+
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
   0x0             0.0  
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 521mm
x 293mm
   1920x1080      60.0 +
   1280x1024      75.0* 
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
   0x0             0.0  


(parts of) this could be related to #22638, but it doesn't appear to be the
same issue.


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