When I previously ran from the CD, I would force Knoppix to start my GeForce4Ti4600 card in 1280x1024, 24-bit mode by using the boot options "screen" and "depth". Now, after installing Knoppix to my HD, I can only get X to run in 1024x768, 24-bit mode. In the bootup messages, I can see that when I use the boot option "screen=1280x1024", Knoppix says: "Using modes '1280x1024' '1024x768' ...(etc)" but from the KDE "Configure - Desktop" dialog, there is no "1280x1024" selection available in the "Screen" drop-down box, and the highest it can let me choose is 1024x768.

Any ideas on why the boot options worked when I ran Knoppix from CD, but now no longer work when I run from HD??