Re: CRT/LCD Switching under X
On 31 May 2001 13:54:12 +0200, Russell Coker wrote:
> On Thursday 31 May 2001 05:40, Pedro "I." Sanchez wrote:
> > While on an X session, and if connected to an external monitor, I can
> > switch the video output to either the flat panel (LCD) OR to the
> > external monitor by pressing Fn-F7 (this is the CRT/LCD switch function)
> > but not to both devices simultaneously.This quite annoying to me when
> > doing presentations.
> >
> > I dual boot this laptop with Window NT. When running NT, Fn-F7 cycles
> > the video output as LCD--CRT--LCD/CRT--LCD--CRT--LCD/CRT..., so I know
> > the laptop can drive both video outputs simultaneously. Also, I just
> > noticed that selecting "Full Screen" mode in VMware while running in CRT
> > mode switches the display to both LCD and CRT simultaneously!
>
> That is very strange. What version of the kernel do you use?
2.2.18
> Do you use the frame-buffer device?
Hmm, How do I know? (I guess the answer is then no ;)
>
> I used to have a problem on my Thinkpad T20 with X server version <=4.0.2
> which meant that Fn-F7 would do nothing at all if I was in X. This was very
> strange because I could switch to a console and Fn-F7 would work perfectly.
Oops, my situation is exactly the opposite. I can do the (OR) LCD/CRT
switching while on X but nothing happens when I am in console mode
(CTL-Alt-F1 for example). I though this was normal but now you make me
wonder whether my configuration is really weird.
> At the time I was using the FBDEV X server, so having two FB applications
> operating in different ways was quite weird.
>
> I am not certain that my problem was solved by upgrading the X server, I was
> also tracking the new kernels at the time and it could have been a kernel
> upgrade. It works fine now with kernel 2.4.4 but broke with ~2.4.0.
>
Well, I have no plans to fiddle with 2.4 at this time.
> I hope this helps your investigation.
>
Thanks for the reply. Just that helps!
--
Pedro
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