On Tue, 13 Nov 2001, Robert Baruch wrote: > I have XF 4.1.0 on RedHat Linux 7.1, on a Dell Inspiron 7500. The > graphics card is an ATI 3D Rage Mobility. I have two monitors -- the LCD > panel on the laptop, and an external Viewsonic VA800. The LCD panel is a > Samsung capable of 1400x1050, and the VA800 is capable of 1280x1024.
> When I use the standard VESA 1280x1024 mode for the VA800, there are a > few lines cut off at the bottom, while the horizontal is fine. So I set > up a special modeline for the VA800. > However, according to the XFree86.log file, the server changes my modeline! > I set up my modeline to: > Modeline "1280x1024va" 108 1280 1328 1440 1688 > 1024 1025 1028 1066 -hsync -vsync > However, the log shows this: > (II) ATI(0): Modeline "1280x1024va" 107.86 1280 1328 1456 1728 > 1024 1024 1027 1056 -hsync -vsync > Why is the server changing my modeline? The ATI driver purposely does not allow changing the panel's dot clock. In addition, in a dual output situation (i.e. DFP and CRT), both outputs will always see the same timings (and image). Among other things, this means the CRT should sync to the same timings as the panel. If it doesn't, as is likely the case for 1400x1050 panels, you are limited to using only one output per X server invocation. And, for CRT-only, you need to specify Option "CRTScreen" in your XF86Config. The driver enforces these restrictions to avoid system lockups. Marc. +----------------------------------+-----------------------------------+ | Marc Aurele La France | work: 1-780-492-9310 | | Computing and Network Services | fax: 1-780-492-1729 | | 352 General Services Building | email: [EMAIL PROTECTED] | | University of Alberta +-----------------------------------+ | Edmonton, Alberta | | | T6G 2H1 | Standard disclaimers apply | | CANADA | | +----------------------------------+-----------------------------------+ XFree86 Core Team member. ATI driver and X server internals. _______________________________________________ Newbie mailing list [EMAIL PROTECTED] *** To unsubscribe , or change message options, see: http://XFree86.Org/mailman/listinfo/newbie
