Thinkpad T42 Display

[Matthew Saltzman]

On Thu, 22 Sep 2005, John DeDourek wrote:

>
>
> 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?
>> 
>
> This may be a regression on FC4 then.  On FC2, my T42 (graphics
> identifies as Mobility Radeon 9600 M10 -- not sure if this is
> standard for all T42s or whether different "models" may have
> different video), holding Fn (function key) and pressing F7 toggles
> among 1) laptop display only 2) external connector only and 3) both
> (but I forget the order of this sequence 1,2,3 or 1,3,2).  So
> if FC4 won't toggle and it's the same video, then something has
> regressed.  I'll find out when I put up FC4 on the machine.

Yes, this is a known regression in x.org as compared to the last XFree86. 
I don't know where fixing it stands on x.org's priority list.

-- 
 		Matthew Saltzman

Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs