I originally set up this monitor with an analogue lead. Everything seemed fine, so I didn't check xorg.conf at all. Then I bought a digital lead, and since then the monitor blinks. Running system-config-display identifies it as a 1280 x 1084 CRT monitor. It is an LCD monitor. That model is not on the drop-down list, so assuming that a specific driver wasn't available for it, I tried telling system-config-display that it is a generic LCD 1280 x 1024 monitor - restarted X, then went back to system-config-display, where it showed up as a CRT monitor. The refresh rate set was way outside the manufacturer's recommendations (1280 x 1024 @ 60Hz). so I tried manually setting refresh rates to match the manual's recommendations. At the moment my xorg.conf has ### Comment all HorizSync and VertSync values to use DDC: Identifier "Monitor0" ModelName "Monitor 1280x1024" ### Comment all HorizSync and VertSync values to use DDC: HorizSync 60.0 - 72.0 VertRefresh 60.0 - 72.0 Option "dpms" EndSection Section "Device" Identifier "Videocard0" Driver "nv" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 16 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection SubSection "Display" Viewport 0 0 Depth 16 EndSubSection EndSection Attached is the relevant part of the specification page. Any advice, please? Anne -------------- next part -------------- A non-text attachment was scrubbed... Name: viewsonic.png Type: image/png Size: 50799 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos/attachments/20080218/bf6df951/attachment-0004.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part. URL: <http://lists.centos.org/pipermail/centos/attachments/20080218/bf6df951/attachment-0004.sig>