Monitor out of range after installation [was: ubuntu-users at lists.ubuntu.com]

[Andrew Kane]

>From a terminal, you can try:
sudo dpkg-reconfigure xserver-xorg

This will present you will a series of choices to pick out video
drivers, keyboard and mouse setup, etc. For some reason, it's not
consistent on my system (my xserver breaks a lot ☹)- sometimes it
skips the video driver section, sometimes other sections. At one time
one of the sections allowed you to specify monitor sync ranges and
allowed modes. I don't know if this is still the case.

If the dpkg-reconfigure does not help, you may be able to manually
edit your xorg.conf file, located at /etc/X11/xorg.conf - but make a
backup copy first! Look for the Monitor section, which will likely
contain an entry headed "Configured Monitor". You can enter the sync
ranges for your monitor here like so:

HorizSync: 28.0 - 33.0
VertRefresh: 43 - 72

Use the numbers for your monitor, of course. You can likely find them
on the manufacturer's website, or elsewhere on the big ol' net.

I'm about to try this last myself, to hopefully solve the xorg issues
I have been having (my monitor's sync ranges are not detected
correctly, so I'm limited to a lower resolution than I like, and the
available resolutions are not consistent.) If it breaks I'll let you
know, so you might want to wait for me to post about it unless you are
adventurous ;^)


On Wed, Feb 11, 2009 at 11:44 PM, Nils Kassube <kassube at gmx.net> wrote:
> gayathri singh wrote:
>> I saw the messages from the BIOS & the Ubuntu logo and a progress bar.
>> After this, I got the message on my monitor "OUT OF RANGE SIGNAL.
>> CANNOT DISPLAY THIS VIDEO MODE, CHANGE COMPUTER DISPLAY INPUT TO
>> 1680X1050 @60Hz " I could not see the login screen.
>
>> Mine is a DELL, wide screen monitor.Supports a max resolution of
>> 1650x1024 Its an ATI Radeon HD 2400XT display.
>> Other hardware details:Processor is  Intel Core2Duo Quad, & is also
>> Vista enabled. CPU has "Optiplex 755 " written on it.
>
> Thanks for the additional info. The problem seems to be the automatic
> configuration of the X server which doesn't find the correct video mode
> for your monitor. However I'm not really familiar with X server problems,
> so hopefully someone else can help.
>
>
> Nils
>
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