After installing Fedora 12 I am having problems setting up 1280x1024 screen resolution. Only 640x480 and 800x600 are available. I was using F11 at 1280x1024 on this hardware before upgrading to F12. After that, so far no joy. I would appreciate any helpful info. I have also tried using various configurations of the xorg.conf and xrandr without success. Obviously, I'm missing something. I feel certain that the fix is right under my nose but so far, nothing works.
Dick Roark
Here is my xorg.conf file:
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# Xorg configuration created by system-config-display
Section "ServerLayout" Identifier "single head configuration" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" EndSection
Section "InputDevice"
# keyboard added by system-config-display Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105+inet" Option "XkbLayout" "us" EndSection
Section "Monitor" Identifier "Monitor0" ModelName "LCD Panel 1280x1024" HorizSync 31.5 - 64.0 VertRefresh 56.0 - 65.0 Option "dpms" EndSection
Section "Device" Identifier "Videocard0" Driver "intel" EndSection
Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x1024" EndSubSection EndSection
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On Fri, Dec 04, 2009 at 17:12:16 +0800, Dick Roark linuxguy.sg@gmail.com wrote:
After installing Fedora 12 I am having problems setting up 1280x1024 screen resolution. Only 640x480 and 800x600 are available. I was using F11 at 1280x1024 on this hardware before upgrading to F12. After that, so far no joy. I would appreciate any helpful info. I have also tried using various configurations of the xorg.conf and xrandr without success. Obviously, I'm missing something. I feel certain that the fix is right under my nose but so far, nothing works.
Probably your monitor isn't doing EDID correctly and the video drivers are playing things safe.
When this happens you no longer get the mode lines you used to so that you can't just specify a larger resolution in xorg.conf, you also need to define and appropriate mode line. cvt is one program you can use to generate mode lines. You should check the documentation of your monitor and video card to make sure your don't drive to drive the display out of spec or you may damage something.
Below is the xorg.conf I ended up using. Don't blindly use it yourself. The mode line may or may not be appropriate for your equipment.
# Xorg configuration created by system-config-display
Section "ServerLayout" Identifier "single head configuration" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" EndSection
Section "InputDevice"
# keyboard added by system-config-display Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105+inet" Option "XkbLayout" "us" EndSection
Section "Monitor" Identifier "Monitor0" ModelName "NEC MultiSync LCD2010X" HorizSync 31.0 - 80.0 VertRefresh 56.0 - 85.0 Modeline "1280x1024_70.00" 129.00 1280 1368 1504 1728 1024 1027 1034 1069 -hsync +vsync Option "dpms" EndSection
Section "Device" Identifier "Videocard0" Driver "nouveau" EndSection
Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Virtual 1280 1024 Depth 24 Modes "1280x1024_70.00" EndSubSection EndSection
On Fri, 2009-12-04 at 10:51 -0600, Bruno Wolff III wrote:
Probably your monitor isn't doing EDID correctly and the video drivers are playing things safe.
For the record, many older monitors (my desktop monitor at work is about 3 years old) appear not to do EDID at all.
If it does do EDID properly, then you have to make sure that, at boot time, it is connected, any KVM switch is pointing to the machine you are booting, and the monitor is powered on.
When this happens you no longer get the mode lines you used to so that you can't just specify a larger resolution in xorg.conf, you also need to define and appropriate mode line.
Even that doesn't work (at least for me), unless I also use the "nomodeset" kernel boot parameter.
--Greg
On 09-12-04 04:12:16, Dick Roark wrote:
After installing Fedora 12 I am having problems setting up 1280x1024 screen resolution. Only 640x480 and 800x600 are available. I was using F11 at 1280x1024 on this hardware before upgrading to F12. After that, so far no joy. I would appreciate any helpful info. I have also tried using various configurations of the xorg.conf and xrandr without success. Obviously, I'm missing something. I feel certain that the fix is right under my nose but so far, nothing works.
Dick Roark
Here is my xorg.conf file:
...
The /var/log/Xorg.0.log file would be useful, as it will show the available modes and what X did with them.