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Thread: HOWTO: change resolution/refresh rate in Xorg

  1. #181
    Join Date
    May 2005
    Location
    New Zealand
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    93
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: HOWTO: change resolution/refresh rate in Xorg

    Quote Originally Posted by matt_symes View Post
    Hi



    Sorry. I managed to lose your post. Maybe it is a monitor issue. Unfortunately i only have one monitor so i am not able to test.

    Kind regards
    Thanks for your reply and sorry, I had just dumped my question in here...

    Yes, it was regarding a monitor issue. I have a 2 monitor setup and every time I boot into Ubuntu, one of them has display issues. It basically draws everything onto the monitor and windows for example look like they stay open when closed. It's as if it does not "undraw" things, if you know what I mean.

    So, to work around the problem, I thought I could use something like xrandr to change the refresh rate for a second and then change it back. However, when I use that, one of my monitors just switches off, so I have to manually go to preferences->monitors to change the refresh rate back and forth.

    Thanks for any ideas.
    Web Application Design and linux support:
    Tim-H. Heuer.

  2. #182
    Join Date
    May 2010
    Location
    Tewkesbury uk
    Beans
    7,657
    Distro
    Ubuntu Development Release

    Re: HOWTO: change resolution/refresh rate in Xorg

    Hi

    Quote Originally Posted by geek.de.nz View Post
    Thanks for your reply and sorry, I had just dumped my question in here...

    Yes, it was regarding a monitor issue. I have a 2 monitor setup and every time I boot into Ubuntu, one of them has display issues. It basically draws everything onto the monitor and windows for example look like they stay open when closed. It's as if it does not "undraw" things, if you know what I mean.

    So, to work around the problem, I thought I could use something like xrandr to change the refresh rate for a second and then change it back. However, when I use that, one of my monitors just switches off, so I have to manually go to preferences->monitors to change the refresh rate back and forth.

    Thanks for any ideas.
    You could try to reset the refresh rate on each monitor.

    Code:
    xrandr --output CRT1 --rate 75
    xrandr --output CRT2 --rate 75
    Is it switching the monitor off ? The monitor can definitely handle that refresh rate?

    What does this do ? Change CRT1 if it is incorrect.

    Code:
    xrandr --output CRT1 --auto
    As i said, i only have one monitor so i can do no more than offer suggestions

    Kind regards
    Last edited by matt_symes; March 28th, 2011 at 11:42 PM.
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  3. #183
    Join Date
    May 2005
    Location
    New Zealand
    Beans
    93
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: HOWTO: change resolution/refresh rate in Xorg

    Quote Originally Posted by matt_symes View Post
    Hi



    You could try to reset the refresh rate on each monitor.

    Code:
    xrandr --output CRT1 --rate 75
    xrandr --output CRT2 --rate 75
    Is it switching the monitor off ? The monitor can definitely handle that refresh rate?

    What does this do ? Change CRT1 if it is incorrect.

    Code:
    xrandr --output CRT1 --auto
    As i said, i only have one monitor so i can do no more than offer suggestions

    Kind regards
    Thanks a lot! That worked! I just did the following:

    Code:
    echo "#!/bin/sh
    xrandr --output CRT2 --auto" > ~/refresh_fix.sh
    Went to System->Preferences->Startup Applications, clicked Add, typed a name and browsed for ~/refresh_fix.sh and restarted happily ever after.
    Web Application Design and linux support:
    Tim-H. Heuer.

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