How to change screen resolution

[Robert G. (Doc) Savage]

On Sat, 2011-03-05 at 21:35 +0000, Triadi Krisnawan wrote:
> Hi Doc,
>  
> Thanks for the info.
> I think I could take off the first posibility because it was working
> fine before with higher resolution 4 weeks ago. But after I rebooted
> the machine went to lower resolution (1024x768) and started
> flickering. So the KVM might not be the problem.
>  
> I will try to use the gft command. I am assuming that this command can
> run in any terminal right?
> And also which are the two lines to be copy?
> Are they : 
> 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz
> Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
> 
> Or 
> Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
> 1028 1060 -HSync +Vsync
>  
> Thanks Doc,
> Triadi
> >
> > 
> > Two possibilities.
> > 
> > (1) Your VGA splitter device might limit its output resolution to
> > 1024x768. That's common with VGA-type KVMs.
> > 
> > (2) Your Modeline statement looks incomplete. Try using the gtf
> utility:
> > $ gtf 1280 1024 60
> > You'll get an output line that looks like this:
> > # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz
> > Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
> > 1028 1060 -HSync +Vsync
> > 
> > Try copying and pasting those two lines into your xorg.conf file. I
> had
> > to replace the underscore '_' character in the double-quotes string
> with
> > a space ' ' to get it to work in my system.
> > 
> > Hope this helps.

Triadi,

The gtf utility actually outputs two lines. The second shown in my reply
wraps onto a third line. It should be clear when you run the gtf utility
yourself.

--Doc