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Setting screen res in Ubuntu 7.04

Last post 18-07-2007, 8:47 AM by Ken Odlum. 35 replies.
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  •  27-06-2007, 7:29 AM 27097

    Setting screen res in Ubuntu 7.04

    Could some kind sole give me a clue how to set the screen res higher than the dephalt 1024 X 768  at 60Hz     please.

    That is the only res shown in Preferences.

     

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  27-06-2007, 4:27 PM 27112 in reply to 27097

    Re: Setting screen res in Ubuntu 7.04

    You will need to edit /etc/X11/xorg.conf in the section which lists the available resolutions and colour depths by adding the resolutions you wish to use in addition to the defaults. You should also edit the screen section to enter you're monitor's verticle and hortizontal sync rates so that it can set the refresh rates that your monitor supports.

    David Nelson
    Team Leader
    Business Support Unit
    Zen Internet
  •  27-06-2007, 7:07 PM 27117 in reply to 27112

    Re: Setting screen res in Ubuntu 7.04

    Or if you have an nVidia graphics card you can install the nVidia driver then use the nVidia control panel to set the characteristics.

    Eric

     

  •  27-06-2007, 9:56 PM 27121 in reply to 27117

    Re: Setting screen res in Ubuntu 7.04

    Thank you both

    It is an ATI card. I am using an lcd monitor so not to worried about refresh rates but the 1024 by 768 is driving me made on a 19" monitor Smile


    I will hunt out that file and see what I can do.

    The PC spec is

    A7N8X-E Deluxe Motherboard

    Athlon 2400+ CPU

    1.25 Gb of DDR 2700 memory

    Asus (ATI) Radeon A9250 Graphics card 

    2 Maxtor 60Gb hard drives

    On board audio (also have SB Live value card)

    2 Pioneer 108 DVDRW drives

     

     

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  28-06-2007, 12:36 AM 27129 in reply to 27121

    Re: Setting screen res in Ubuntu 7.04

    If it's not already installed, open Synaptic & install linux-restricted-modules & the restricted-manager. Then open the Restricted Drivers Manager in System -> Administration. Select "ATI accelerated graphics driver", this will hopefully setup & enable fglrx. I did it with a nVIDIA card in one of my machines, & it worked fine. I also installed the nvidia-settings too, which enabled me to select the correct refresh rate (85Hz) for my monitor. Now I understand that the ATi card has a control panel, fglrx-control, which you can install via Synaptic & which may do a similar thing to the nVIDIA one that I used.

    HTH Smile 


    Windows free for 11 years! :)
    Mandriva 2008.1 64-bit
    Mandriva One 2008.1 32-bit
    FreeBSD 7.0
  •  28-06-2007, 7:29 AM 27130 in reply to 27129

    Re: Setting screen res in Ubuntu 7.04

    Installed all I can find but no joy.

    Tried to edit xorg.conf also but I can not gain access to it (will not allow me to resave) and can't figure out how as yet. 

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  28-06-2007, 7:51 AM 27131 in reply to 27130

    Re: Setting screen res in Ubuntu 7.04

    You can't edit system files as a user. Open a konsole and type

    kdesu kwrite /etc/X11/xorg.conf

    or alternatively, using the Konqueror file manager, navigate to /etc/X11 and right-click on xorg.conf; from the popup menu select Actions --> Edit as root.

    Either way, you'll be asked to enter your password and then you can edit and save the file. But be careful, it's only too easy to lock yourself out of the GUI by messing up this file. It would be a sensible precaution to save a copy first with

    sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.backup 

    Eric

     

  •  28-06-2007, 12:33 PM 27135 in reply to 27131

    Re: Setting screen res in Ubuntu 7.04

    Thanks Eric I installed kwrit and edited the file and saved OK but after a re-boot it still ignored the extra setting ("1280x1024" and the 75Hz vert refresh that I added in. Screen res in preferences still only shows a max of 1024x768 Smile


     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  28-06-2007, 1:34 PM 27137 in reply to 27135

    Re: Setting screen res in Ubuntu 7.04

    If you didn't set the vsync and hsync settings for your screen it will not be able to determine if your monitor is capable of 75Hz at 1280x1024. These settings need to be a range so they can find a matching supported combination of resolution and refresh rate. You should be able to get this information from your monitor's documentation or possibly on the monitor's label.

    David Nelson
    Team Leader
    Business Support Unit
    Zen Internet
  •  28-06-2007, 2:24 PM 27138 in reply to 27137

    Re: Setting screen res in Ubuntu 7.04

    David Nelson:
    If you didn't set the vsync and hsync settings for your screen it will not be able to determine if your monitor is capable of 75Hz at 1280x1024. These settings need to be a range so they can find a matching supported combination of resolution and refresh rate. You should be able to get this information from your monitor's documentation or possibly on the monitor's label.

    BINGO! Big Smile

    David, Eric, every one Thank you very much indeed.

    The manual for this LG monitor did not give a spec but found the info on the net and now running Ubuntu at 1280x1024 at 60Hz and it looks great.

    I can have a good nights sleep now Big Smile

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  28-06-2007, 4:47 PM 27142 in reply to 27138

    Re: Setting screen res in Ubuntu 7.04

    Great!

    (By the way, when I suggested that you use 'kdesu kwrite ...', that's because I use Kubuntu, and I forgot that you are using Ubuntu. The equivalent Gnome command would be 'gnomesu gedit ...')

    Eric


     

  •  29-06-2007, 6:51 AM 27151 in reply to 27142

    Re: Setting screen res in Ubuntu 7.04

    IC Eric

    I just installed the software but it seems to have worked Big Smile

    While this thread is still running how do I get Ubuntu to allow me to delete and write to the second hard drive or a usb external drive??

    It always tells me that I am not the owner and the properties to change permissions is greyed out.

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  03-07-2007, 1:55 PM 27196 in reply to 27151

    Re: Setting screen res in Ubuntu 7.04

    I took Ubuntu off the other day and installed Kubuntu but must admit that I did not really like it so went back to Ubuntu again. I can now sort out the resolution problem within minutes after the excellent advice I got on here. I still have not got Ubuntu to allow me to write to an external device or the second hard drive yet and beging to think that maybe it is not allowed on a linux system which makes backups impossible.

     

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
  •  03-07-2007, 6:31 PM 27201 in reply to 27196

    Re: Setting screen res in Ubuntu 7.04

    Ken Odlum:
    I still have not got Ubuntu to allow me to write to an external device or the second hard drive yet and beging to think that maybe it is not allowed on a linux system which makes backups impossible.

    Linux will certainly let you do all that, if it is configured to do so! It's not clear what your problem really is, but there are twothings which could be useful.

    1. Execute the command

    cat /etc/fstab

    from a terminal, and let us see what it says. There are clearly permission problems involved here, and it may be that users other than "root" do not have permissions set.

    2. Ubuntu is a bit "weird" about how to "become root". Most Linux distributions just let you log in as root (with the root password set when the system was first set up). Ubuntu's version is the "sudo" command. If you want to do stuff with root privileges, you can execute to command

    sudo -i

    followed by entering the root password. Then you are indeed logged in as root! You can then fiddle with the stuff that root is allowed to fiddle with (which "ordinary" users are not -- in that sense some things are "not allowed" on a Linux system. It all goes back to the otiginal days when Unix was first a multi-user operating system. You  couldn't have just any logged-in user playing with the structure of the system, so it was organised so that only privileged people who knew the root password could be the "superuser").

     Hoping this helps!

  •  03-07-2007, 9:51 PM 27205 in reply to 27201

    Re: Setting screen res in Ubuntu 7.04

    Thanks I will see what I can do with those instructions.

    The problem is that if I go to the second hard drive or plug in a usb drive Ubuntu will allow me to copy and read from those drives but if I try to write a file or delete a file from then I get a message to say that I do not have permission.

    It makes any sort of backup impossible.

     


    Ken

    Zen Active 8000

    Middle age is when your classmates are so grey, bald and wrinkled that they don't recognize you.
    -Bennet Cerf
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