[Newbie]Graphics Scewed

[Andrew Lindeman]

Hello,   I've recently bought a laptop (Compaq Presario 2800) and installed Red Hat Linux 7.3 on it.  Everything went just as planned except when it came to installing X.   The installer detected my video card (ATI Radeon Mobility M7 LW) fine and configured my pretty generic LCD monitor (60 Hz refresh rate, if that matters).  I intend to use 16 or 24 bit color with 1024x768 as my resolution (these do work as I have tried them under Windows XP).   When it came time to test my settings, I clicked OK.  What came up was a slightly scewed (did I spel that right?) picture of my desktop.  I tried different settings (different resolutions/color depth) but with the same results.  I kept going with the installation, thinking it might work upon completion, but on the first boot-up, the graphics were still messed up.   Basically, it look like there is a bunch of streaks down my screen.  They are virtical lines that mess up a few pixels around them.  The screen is still pretty readable, but text is difficult to make out sometimes.  I'm pretty sure it is a configuration problem, because taking screen shots and viewing them in Windows reveals a perfectly clear screen.  What can I do about this?  What settings should I change? Where?   If I did not give enough information, please email me back.  Thank you for a great product, and I look forward to getting it resolved.   Thank you so much, Andrew Lindeman