Thinkpad T42 Display

[Ed Hill]

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?

Out of curiosity, I plugged my T42p (2373-HTU) into a video projector
and noticed the following:

 - it worked but the image was a bit fuzzy -- while I'm not 100% 
   certain, it appeared that my video card was driving the external 
   projector at a higher rate and it was forced to somehow down-
   sample and it did not do a great job -- so perhaps adjusting 
   the rate or the resolution (my LCD is 1600x1200 native) would
   give a crisper image on the LCD...?

 - the external VGA adapter seems to be "always on" as Matthew 
   describes -- pressing Fn--F7 did nothing

 - I'm running the very latest FC-4 stuff with *no* proprietary 
   drivers added (just as-shipped from Fedora + updates):
   - kernel: 2.6.12-1.1447_FC4
   - xorg-x11: 6.8.2-37.FC4.49.2

 - lspci reports:
   "01:00.0 VGA compatible controller: ATI Technologies Inc
     M10 NT [FireGL Mobility T2] (rev 80)"

Ed

-- 
Edward H. Hill III, PhD
office:  MIT Dept. of EAPS;  Rm 54-1424;  77 Massachusetts Ave.
             Cambridge, MA 02139-4307
emails:  eh3 at mit.edu                ed at eh3.com
URLs:    http://web.mit.edu/eh3/    http://eh3.com/
phone:   617-253-0098
fax:     617-253-4464