I've heard there's some strange issues with Mandrake 10. You could try a different distribution, or even Mandrake 9.2 which is much more stable. But, honestly, unless you have strange hardware, it should work just fine.
Or, you could try editing your xfree86 configuration file. If you want to try that, make sure you make a backup
. It should be in:
/usr/X11R6/etc/X11 - it's called XF86Config
Then, from a terminal window, type:
It'll give you a step-by-step configuration process. You'll need to know your monitor's information (Brand, model, horizontal scan, vertical refresh, max resolution it can handle) and your video card's information (brand, model, RAM) and it'll also ask you about your mouse and keyboard, which usually the defaults are fine. Make sure you have this information before you start and if you don't know the specifics of your monitor and video card, you probably don't want to try this. You could do damage to both.
It'll come to the part where it asks you for your preferred screen resolutions. It's straight forward, so just take the time to read it and answer correctly.
When that's done, you'll have to log out (to restart the X server) and see how that goes.