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Thread: HOWTO: change resolution/refresh rate in Xorg

  1. #21
    Join Date
    Dec 2005
    Beans
    9

    Re: HOWTO: change resolution/refresh rate in Xorg

    I did try a custom modeline. My xorg.conf included this:

    Section "Monitor"
    Identifier "aticonfig Monitor 0"
    HorizSync 31-101
    VertRefresh 60-160
    # V-freq: 85.00 Hz // h-freq: 94.05 KHz
    Modeline "1400x1050" 211.42 1400 1512 1768 2248 1050 1050 1054 1106
    EndSection

    Section "Monitor"
    Identifier "aticonfig Monitor 1"
    HorizSync 31-101
    VertRefresh 60-160
    # V-freq: 85.00 Hz // h-freq: 94.05 KHz
    Modeline "1400x1050" 211.42 1400 1512 1768 2248 1050 1050 1054 1106
    EndSection

    I saw no difference with this configuration.

    The thing that looks wrong to me is that the NoDDC and IgnoreEDID options are being ignored by the ATI driver. Is the syntax different? Is there some other way to get the driver to ignore the EDID?

  2. #22
    Join Date
    Apr 2005
    Location
    Finland
    Beans
    Hidden!
    Distro
    Hardy Heron (Ubuntu Development)

    Re: HOWTO: change resolution/refresh rate in Xorg

    Just a guess, but you could try:
    Code:
    Option "UseEdidFreqs" "0"

  3. #23
    Join Date
    Apr 2005
    Location
    Sintra, Portugal
    Beans
    835

    Lightbulb Re: HOWTO: change resolution/refresh rate in Xorg

    Hi,

    Very nice guide. I just want to make a small suggestion. In the end, instead of restarting gdm, one should first test if the configuration is right. As most newbies wouldn't know what to do if their X is lost, it's better to do

    Code:
    sudo xinit -- :2
    where one can see the result on a new X (ctrl+alt+F9) without losing the first. If something goes wrong, one can easily use the backup configuration under their surviving X (ctrl+alt+F7).

  4. #24
    Join Date
    Dec 2005
    Beans
    9

    Re: HOWTO: change resolution/refresh rate in Xorg

    I tried this, and got the same message in /var/log/Xorg.0.log indicating that the setting was not used/recognized:

    (WW) fglrx(0): Option "UseEdidFreqs" is not used

    Is this the right place to be asking this question or should I be trying to ask someone at ATI?

  5. #25
    Join Date
    Jun 2005
    Beans
    12

    Re: HOWTO: change resolution/refresh rate in Xorg

    Quote Originally Posted by henriquemaia
    Hi,

    Very nice guide. I just want to make a small suggestion. In the end, instead of restarting gdm, one should first test if the configuration is right. As most newbies wouldn't know what to do if their X is lost, it's better to do

    Code:
    sudo xinit -- :2
    where one can see the result on a new X (ctrl+alt+F9) without losing the first. If something goes wrong, one can easily use the backup configuration under their surviving X (ctrl+alt+F7).
    Great tip thanks! Would anyone mind telling me, though, how to stop that secondary X once it's started? Very useful, not having to restart the computer and all could have saved me half an hour at least as I'm working with this xorg stuff

  6. #26
    Join Date
    Dec 2005
    Beans
    9

    Re: HOWTO: change resolution/refresh rate in Xorg

    No one out there has any ideas?

    Thanks for anything!

  7. #27
    Join Date
    Dec 2005
    Beans
    9

    Re: HOWTO: change resolution/refresh rate in Xorg

    This is the crummy response I got from ATI:

    "
    ATI does not provide direct technical support for laptops/notebooks at this current time (telephone or email). If you require direct technical support please contact the system manufacturer of your laptop/notebook.
    "

    ugh... i'm out of leads on this. i am afraid that i'm going to have to give up on ubuntu. i have had *constant* problems with the wireless and video card drivers. Basic functionality doesn't work well: vpn, docking, hibernation. I can't easily install current versions of core software: firefox. And the desktop search is still mediocre and broken: beagle.

    The tools that I'm using linux for (emacs, ethereal, apache, gimp and a good terminal) have major problems running on windows, but I can use cygwin and run them on a server.

    I had high hopes for ubuntu but when current off the shelf hardware requires many hours of tinkering, and even then you don't end up with a robust system, what's the benefit? I've had ubuntu crash on me and demonstrate more instability than any windows installation i've ever used.

  8. #28
    Join Date
    Feb 2006
    Beans
    2

    Re: HOWTO: change resolution/refresh rate in Xorg

    Im very new to linux as well as ubuntu I was trying to edit the resolution so
    I made a backup file for xorg.conf

    then I typed sudo /etc/init.d/gdm stop (or kdm for KDE)
    my computer restarted and now I cant get on the internet

    I tryed to sudo /etc/init.d/gdm start

    help lol

  9. #29
    Join Date
    May 2005
    Location
    Lecce, Italy
    Beans
    6,168
    Distro
    Ubuntu

    Re: HOWTO: change resolution/refresh rate in Xorg

    Quote Originally Posted by Berdobenz
    Im very new to linux as well as ubuntu I was trying to edit the resolution so
    I made a backup file for xorg.conf

    then I typed sudo /etc/init.d/gdm stop (or kdm for KDE)
    my computer restarted and now I cant get on the internet

    I tryed to sudo /etc/init.d/gdm start

    help lol
    The command "sudo /etc/init.d/gdm stop" should only get you to the command line (you won't see the Desktop Environment GNOME or KDE). Are you sure it restarted you computer?

  10. #30
    Join Date
    Feb 2006
    Beans
    2

    Re: HOWTO: change resolution/refresh rate in Xorg

    your right i restarted it... the gui comes back on but I cant get on the net the error message says i to recheck the web site name.


    thanks for helping

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