[H-GEN] problem with data projector
McBofh
McBofh at jmcp.id.au
Thu Feb 22 18:19:06 EST 2007
Peter Robinson wrote:
> I am struggling to make my laptop talk to one of the data projectors in
> a lecture room at UQ (3-206). Xorg is defaulting to 800x600.
> The display on the lecture desk pops up a window saying the optimal is
> 1024x768.
>
> I am using a Dell Latitude D600 with an ATI Radeon R250 running Ubuntu
> Edgy.
>
> I did some google searching and found a suggestion - add the following
> to the Monitor section of xorg.conf
>
> HorizSync 30-61
> VertRefresh 56-76
>
> When I tried that Xorg then defaulted to 640x480 :(
>
> I then tried dpkg-reconfigure xserver-xorg with the data projector
> connected and it added
>
> HorizSync 28-70
> VertRefresh 43-60
>
>
> Again that gave a resolution of 640x480 (and if I commented those out
> it was back to 800x600).
>
> It has no trouble with other data projectors around the place (e.g. 50-2
> and 50-3 and our seminar room).
>
> Any suggestions on what I should try next?
Either add
Option "MonitorLayout" "LVDS,TMDS"
to your xorg.conf's Device section, or use the vesa mode :)
Seriously, I've had no end of problems getting Xorg to work with my
laptop's ATI card and any external display. With recent builds of
Xorg (7.1) it's come good again, but I haven't tried a projector.
What I've found - after much annoyance - is that using plain old
vesa allows everything to sync up just fine.
For reference, I've attached a copy of my working dual-head
conf file with vesa.
The other thing to ask is, what are the projector models in
each of those three rooms you mention?
James C. McPherson
--
Solaris kernel software engineer, system admin and troubleshooter
http://www.jmcp.homeunix.com/blog
Find me on LinkedIn @ http://www.linkedin.com/in/jamescmcpherson
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