SOLVED
I have recently installed linux on my desktop pc, But im having trouble getting ubuntu to detect that my monitor can do anything other than 75hz refresh rate. Does anyone have expierience with this problem and can shed some light? Would be REALLY grateful as this is the only thing keeping me on windows atm!

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Just to add, I have tried editing xorg.conf through both gedit and a GUI-based editor, both failed hard (most likely due to my lack of linux knowledge)

if you are using nvidia drivers this might help:
https://bugs.launchpad.net/ubuntu/+source/linux-restricted-modules-2.6.20/+bug/104105/comments/9

update: fixed thanks to some helpful lads in #ubuntu @freenode

Perhaps you want to post the solution here for future reference?

Yes, i got the same problem and still cant fix it

If you are not able to run your resolutions at higher refresh rates you will have to manually specify a new modeline within your X configuration. Moreover, it might be nescessary to add a monitor configuration which is able to display the desired mode in case the automatically retrieved information from the monitor is wrong.

As a first step, what resolutions does xrandr present to you, assumed that you are running the GL client? For instance, the following dump shows me that I am able to set my resolution to at most 1024x768 @ 85Hz and can also switch to 400x300 @ 60 Hz, which was manually added.


A new modeline can be created by using the tool gtf. The command below will create a modeline for the resolution 640x480 with a refresh rate of 150Hz:


This modeline must now made available in X. For that to happen, copy /etc/X11/xorg.conf to /etc/X11/xorg.conf.orig and edit /etc/X11/xorg.conf. In the section Monitor, add the modeline.


Further it might be nescessary to tell the graphics hardware that it should disable auto detection and use the timings which are defined by monitor Monitor0. The string LVDS below must match the output identification which you want to alter and is shown by xrandr, e.g., if xrandr tells you that the screen is named VGA then instead of monitor-LVDS you would write monitor-VGA.


Now restart X and see if the new mode is shown by xrandr. You can switch to the new mode and test it out:


Maybe my solution is a little bit complicated, but that's how I forced my GL ezquake to run at 400x300 today.

Regards,

bitfaust

Please choose as specific names for the topics as possible. It saves time of the readers, it also helps YOU get more attention from people, who might actually know something about that area. Also when you problem is resolved, it's good habbit to edit first post and add 'SOLVED' on the top of it, same for the name of the topic.