Thinkpad T42 Display

[Charlie McVeigh]

On Thu, 2005-09-22 at 11:07 -0400, Matthew Saltzman wrote:
> On Thu, 22 Sep 2005, Clive Anderson wrote:
> 
> > Hi, I just recently upgraded from Thinkpad T30 to a
> > Thinkpad T42 running FC4.  I need to be able to
> > connect a projector to the computer for presentations
> > and so far I have not being to do so. Does anyone know
> > what the proper xorg.conf settings to allow a
> > projector to work with the T42?
> 
> 
> On my T41 (Radeon Mobility 7500), it Just Works (modulo some display 
> quality issues you can find in another recent thread).  In fact, the 
> default is for both panel and VGA to be live, and there is no convenient 
> way to make F7 toggle them.  (But see the radeontool command in pm-utils.)
> 
> Which screen/video card do you have?  Which video driver are you using. 
> What are your actual symptoms?  Does it work as expected in Windows (if 
> you have it)?  What if you boot with the projector attached?  Does 
> radeontool help?
> 

I recently did some experimenting with my T42 (2378) and I found that an
external projector works reliably at various resolutions if you simply
boot the Thinkpad with the projector connected to the external VGA port.
If your VGA port is not live then you may need to go and change the BIOS
settings for the default LCD screen and VGA to be live.

I found that the Fn-F7 key works correctly until the X server is loaded
- In other words the Fn-F7 toggled between LCD -> VGA -> LCD/VGA as
expected until X is loaded.  After X is loaded the Fn-F7 key stops
working as Matthew descibes above.

Good luck.

Charlie