Hello everyone ...

I started using Linux Redhat 9 yesterday ... and today I changed the screen res from 1600x1200 to 1024x768 ... I logged out, the screen res did kind of change ... but the screen is only black, I think its becauce of the refresh rate, becauce Linux doesnt have the driver for ViewSonic P90f

I dunno how to change it back ... I tried to use Xconfigurator but it wouldnt work ...

could someone guide me step by step ...

thanks ...

when you're next at the "black screen", try CTRL+ALT++, that's the control key + the alt key + the number pad "+" key, this should jump your resolution back up, if it's still black, do it again until you're back to 1600x1200 or some resolution that works, the "-" key takes you back down, hopefully whatever "wizard" you used only changed that part of your XF86Config, if not, you'll need to edit it manually, don't despair, it's not that bad to edit.

If all else fails, you can generate a new (working!) XF86Config file easily on XFree86 version 4.x (which RedHat 9 should be using). Simply run the command

X -configure
(note, on some systems the command may be XFree86 or XFree. This is different from the startx command, it directly calls the X server)

as root (without having X running).
It will detect your hardware (or as much of it as it could), and create a temporary configuration file and give you instructions on what it could not detect and how to fix it. It will also give you instructions on how to test it. Once you have a working configuration, copy the test file over the existing config (you might want to make a backup Just In Case), which is usually in /etc/X11/ or a similar directory.