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i use redhat 9.0 with gnome. when i first installed, i could change the resolution. But for fixing an optical mouse slowness problem today, i first mess with xf86config and it gave an error and resolutin changed to 800x600). after that, i fixed the mouse issue but this time i am unable to change resolutin to 1024x768 from anywhere, i tried all the applications but no luck. One problem is i use a new KDS monitor, which linux could not detect. But it was fine with it anyway. What could be the problem? My craphics card is radeon 8500LE , and it works fine .
exactly. i changed from system settings, and it makes the options in xf86config only 800x600 and 600x480 no 1024x768. even if i add the 1024x768 by myself, screen resolution does not change. i start x, changed to root, reboot, but no luck.
Many thanks, problem is solved.
i did as you said, then i saw that monitors scan frequencies are way too low. Because RH9 could not recognize monitor after i messed XF86config file. Now i tune them with the information i have found in net about the monitor, works like a charm
If you want to do it with the GUI sometime you can go to the Display settings / Advanced, click the Configure button. If your monitor is not listed choose the right max res under generic, and set the freq ranges.