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Old 08-09-2011, 11:23 PM   #1
Murphydog
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Projector problems


Using 11.04 on a Dell C400 laptop. It works fine but having a problem getting good connection with my Sharp XG-NV5XU projector. The image keeps flickering and jumping. I've tried every kind of adjustment I can think of and even scanned some on-line descriptions of fixes. But I'm still a relative newbie and no success yet. I'm just guessing there's a driver issue or something with different resolution settings?
 
Old 08-10-2011, 12:52 AM   #2
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Hello Murphydog,

I'd recommend to try a normal PC-Monitor instead of the projector. Then you can see if it is the connection itself which not works properly or if there is another issue related to the projector.

I'll report your thread to the Moderators and ask it to be moved to "Hardware" this is not a newbie-question and you will hopefully find more help there.

Markus
 
Old 08-10-2011, 11:47 AM   #3
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Moved: This thread is more suitable in <HARDWARE> and has been moved accordingly to help your thread/question get the exposure it deserves.
 
Old 08-10-2011, 02:43 PM   #4
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If you have not tried it I would try adjusting the Horizontal and Vertical refresh rates in xorg.conf, or maybe generating a modeline and using it in xorg.conf.

http://xtiming.sourceforge.net/cgi-bin/xtiming.pl
 
Old 08-10-2011, 11:44 PM   #5
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Projector problem

OK, thanks. But you'll have to spell it out more simply for a newbie.
I gather that I open a terminal. But then what is the exact command(s) to reset horizontal and vertical refresh rates?
I looked at your modeline site but it honestly confused me about how to apply results even if I figure out how to fill in correct variables.
Thanks for any more details.
 
Old 08-11-2011, 12:33 AM   #6
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Hello,

you should open a terminal and read the manpage for xorg.conf. Execute the command
Code:
man xorg.conf
And in the manpage look at the "Monitor section".
I think you'll find a good explanation in the manpage.

Markus

Last edited by markush; 08-11-2011 at 12:35 AM.
 
Old 08-11-2011, 01:46 AM   #7
Murphydog
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Projector problem

Sorry, this is still over my head.
 
Old 08-11-2011, 01:29 PM   #8
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Ok just go to '/etc/X11/xorg.conf' and post that file on here or pastebin with link.
 
Old 08-11-2011, 10:45 PM   #9
Murphydog
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Tried that command exactly and got response "No such file or directory"
Sorry, am I missing something?
 
Old 08-12-2011, 01:06 AM   #10
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Well nowadays most system don't use the xorg.conf file anymore. But if you create one it will be used. You could write a minimal xorg.conf file with only the refreshrates.

Markus
 
Old 08-12-2011, 11:05 AM   #11
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If there is no xorg.conf then you can make a small one like markush suggests.

Here's an example:

Code:
Section "Monitor"
    HorizSync   31.5 - 50.0
    VertRefresh 40-90
EndSection
Check the projector manual and see what values it lists, and use those.
 
Old 08-12-2011, 01:35 PM   #12
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Projector problem

OK, sorry to be dense.
But how do you create the file to place those commands?
 
Old 08-12-2011, 02:10 PM   #13
Murphydog
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OK, I figured that out and created an xorg.conf file using these parameters which were best I could figure from confusing Projector manual:
Section "Monitor"
HorizSync -90.0 - 90.0
VertRefresh -60-60
EndSection

But still no go.

Also found a read-only xorg.conf file which read as follows:
# Minimal xorg.conf for the Nouveau driver

Section "Device"
Identifier "Default screen"
Driver "nouveau"
EndSection

Does any of that help?
 
Old 08-12-2011, 03:18 PM   #14
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So, you have an nvidia card I see. If so, I recommend trying to install the proprietary nvidia drivers and seeing if they work better.
http://www.psychocats.net/ubuntu/nvidia
 
Old 08-12-2011, 11:38 PM   #15
Murphydog
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Sorry, can't get that option from my System/Admin.

Is there somewhere else/way to get drivers?
 
  


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