My 21" CRT blew the other day so I replaced it with an LCD monitor identical to one I had just gotten at work: A Dell 2007FP. It works fine on all the Windows machines, even at 1600x1200 60 Hz, but it doesn't work so hot on my Linux machine: I get a shimmering with wavy columns (1-2mm amplitude ) that is just unacceptable. I am told this is a symptom of the wrong refresh rate.

I am running an older system. The machine is 2003 vintage, with an Intel 845 (i810 driver) built-in video card. I am running Red Hat 9 (yes I realize this is old) running XFree86 (yes even older), but I tried the Mandriva Spring 2007 One Live disc and it has the same problem.

The problem happens for 1600x1200 @60 Hz and 1280x1024 @60Hz, but not any lower resolutions. I tried three different ModeLine values I picked up on the Internet (see comments). I tried Autoprobe too.

The Monitor section of my XFree86Config file is below.

Can anyone help me get this to work, or else recommend a large brand-name LCD monitor that will work with an older version of Linux?

Thanks for any help!

Eric

Hi there,

If you'd installed your linux box with one type of monitor and then replaced it with another, this type of glitch is usually seen.

The other day when I installed RHEL3 WS on a DELL OptiPlex 745 with a Samsung SyncMaster 710V LCD monitor and later replaced it with a Compaq LCD, I got myself into a similar situation. I'd to connect the box back to the first monitor and lower the resolution. Apart from that, it'd be advisable to specify driver as Vesa in /etc/X11/XF86config file.

That's all I have on this, for now :-).