blank external DVI on Thinkpad T40

[Gilad Arnold]

On Wed, Feb 25, 2009 at 04:50:52PM -0500, Alex Deucher wrote:
> Perhaps the panel doesn't like the pll or the modeline?

I doubt it because the same modeline works with the RGB port (connected
to the same monitor):

$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1200
VGA-0 connected 1920x1200+0+0 (normal left inverted right) 546mm x 352mm
   1920x1200      60.0*+   59.9  
   1600x1200      59.9  
   1680x1050      60.0  
   1600x1000      59.9  
   1280x1024      75.0  
   1280x960       59.9  
   1152x864       75.0  
   1024x768       75.1     60.0  
   832x624        74.6  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
DVI-0 connected 1920x1200+0+0 (normal left inverted right) 546mm x 352mm
   1920x1200      60.0*+   59.9  
   1600x1200      59.9  
   1680x1050      60.0  
   1600x1000      59.9  
   1280x1024      75.0  
   1280x960       59.9  
   1152x864       75.0  
   1024x768       75.1     60.0  
   832x624        74.6  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
LVDS connected 1400x1050+0+0 (normal left inverted right) 0mm x 0mm
   1400x1050      50.0*+
   1280x1024      59.9  
   1152x864       60.0  
   1280x720       59.9  
   1024x768       60.0     59.9  
   800x600        60.3     59.9  
   640x480        59.9     59.4  
S-video disconnected (normal left inverted right)


> Can you post your xorg log and config somewhere?

http://play.cs.berkeley.edu/~arnold/xorg/

> IIRC, I vaguely recall the ignore option doesn't work right.
> shouldn't matter anyway as turning off LVDS using xrandr does the same
> thing.

It is not obvious (as a user) that the --off option removes the LVDS
from the xorg layout entirely (i.e. deallocates video memory, etc). Or
is it doing so?  Even after turning LVDS off the different modelines are
still listed on subsequent xrandr calls. (In other words, setting a
display to --off is different than pulling the cable out, what cannot be
done with the laptop panel of course ;-) )

> Multiple displays should work fine.  I think 1920x1200 on DVI worked
> fine last time I tested on my rv250, but I can test again.

I'd appreciate it if you can double check, and if it does send me your
working config and software versions (xorg, radeon).

Gilad