[ltp] T30: Video frequency to external projector?

[Atul Chitnis]

I have a problem that's been bugging me for a while:

I now know how to get my T30 talking to an external projector without too 
many issues (I dont connect the projector until I am all booted up, and 
switched X to 1024x768 using xrandr), but I seem to have an issue with the 
frequency of the output to the projector.

I use FC3, with xorg-x11-6.8.1-12.FC3.21. Though the output is correct at 
1024x768, it seems to be the wrong frequency, be cause I invariably end up 
with a stretched or distorted image on the projector, usually wider than 
it should be. Any true 1024x768 notebooks display normally, but when I 
switch to 1024x768 from 1400x1050, the display is ok in height, but too 
wide, resulting in the sides of teh image to be cut off.


xrandr reports:


 SZ:    Pixels          Physical       Refresh
 0   1400 x 1050   ( 474mm x 356mm )   50
 1   1280 x 1024   ( 474mm x 356mm )   50
 2   1280 x 960    ( 474mm x 356mm )   50
 3   1152 x 864    ( 474mm x 356mm )   50
*4   1024 x 768    ( 474mm x 356mm )  *50

Any tweaking that I can do to fix this issue? My xorg.conf is at 
http://atulchitnis.net/tmp/xorg.conf

lspci says 

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 
LW [Radeon Mobility 7500] (prog-if 00 [VGA])
        Subsystem: IBM ThinkPad T30
        Flags: bus master, stepping, fast Back2Back, 66Mhz, medium devsel, 
latency 66, IRQ 5
        Memory at e8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 3000 [size=256]
        Memory at d0100000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2


Is there anything I should be looking for in the config?


TIA

Atul