On 7 Jan 2002, Jose Fonseca wrote: > I have a ATI Rage Mobility P/M 4Mb with a 1024x768 TFT screen on my > laptop with RHL 7.2 and XFree 4.1.0.
> For some applications (playing games and watching movies) I've found > that is better to use lower screen resolutions to achieve a higher frame > rate. > First I tried to use a 512x384 mode to get integer scaling and better > performance, but XFree complained that it was not a valid mode. My first > question is if it's possible to configure a 512x384 mode for a LCD > screen and how? Start with a working 1024x768 mode line and divide all timings by two. > Then I tried the standard 640x480 mode and for my surprise I didn't > notice any downgrade in the speed. My second question is: What makes the > rescaling after all: the graphics card itself or a dedicated LCD > controller? They are one and the same. > Unfortunately not everything is a bed of roses.. Besides the expected > blur due to the non-integer scaling there are two annoying green > vertical lines placed 1/4 and 3/4 of the horizontal length of the > screen. This must be a bug since this behavior isn't noted on Windows. > Has anyone ever noticed this? Hum, sounds like a bad DSP register setting, although that's unlikely for a panel. Do any other modes display similar behaviour? 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. _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
