Nagy Ferenc László wrote: > > > Hi! > > There was a thread in november with the same subject starting here: > http://www.mail-archive.com/xfree86@xxxxxxxxxxx/msg11195.html > > I have the same problem (on somebody else's hardware): when video > memory is written, screen flickers. > > The effect can be seen better with small number of objects on black > background, so here are the details: When there is a blue object > somewhere on the left side, then a copy of the object appears about > 170 pixels right in red color. Another 170 pixels right a green copy > appears, then blue, red, green and so on again, with less and less > intensity (less and less incorrect pixels). > > I've used 24 bit color depth and software cursor (so every mouse move > caused video memory write). The phenomena didn't follow mouse, only > the fact of move (change of picture) was important. Horizontal lines > are peculiar (false pixels are in burst), but I've only seen vertical > lines when the original picture contained one. > > Setting xvideo to no helps a lot. Reducing depth and resolution helps > too. > > XFree86 version (from UHU-Linux 1.1-rc3): > > XFree86 Version 4.3.0.1 > Release Date: 9 May 2003 > X Protocol Version 11, Revision 0, Release 6.6 > Build Operating System: Linux 2.4.20-11smp i686 [ELF] > Build Date: 18 December 2003 > > Video card (S3 ViRGE/DX from 1998): > > (II) PCI: 00:09:0: chip 5333,8a01 card 5333,8a01 rev 01 class 03,00,00 hdr 00 > That thread covers the steps to reduce flicker. You will get rid of it by using depth 16 also, which is what I generally run on virge dx cards. These are low end graphics cards, and short of limiting the depth 24 resolution further in the driver, I don't think there are any other good solutions at this point. (Well, some driver tuning might help.) -- Kevin _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
