Re: [linux-fbdev] Re: 2.3.99pre7-8 experiences

[Chris Brown <cblist@cityb.net>]

On Fri, May 12, 2000 at 09:37:22AM -0400, Adam C Powell IV wrote:
> 
> Michel Dänzer wrote:
> 
> > Adam C Powell IV wrote:
> >
> > > > >    * atyfb still doesn't support Xfb with accels properly, same problems
> > > > >      as 2.2.
> > > >
> > > > What are they? (Sorry if this is old news :)
> > >
> > > (Sorry, I forgot only fbdev list members have seen this.)  Minor problems,
> > > such as: expose events don't lead to proper redraws, little 8-pixel-wide
> > > horizontal line artifacts appear and don't go away, some modes fail
> > > completely.  no_accel -> no problem.  Geert sent me info on how to try and
> > > fix these problems, I've tried but no useful results yet.
> >
> > Accel in the 3.3 fbdev server is a big mess (I've played with it for the
> > Permedia2 :) . Everyone should switch to 4.0 ASAP.
> 
> Really?  I seem to be the only one having trouble with accel Xfb-atyfb in 3.3,
> and thought that the 4.0 fb backend does not yet have accel...
> 
> Well, it's a minor problem, I'll look into 4.0 after fixing other problems, like
> clgenfb (next post...) and PPP.
> 

Actually, I get pretty much the same symptoms you describe with the frame
buffer in both 3.3 and 4.0. I have been forced to use Xpmac (which gives me
acceleration without the annoying artifacts, but doesn't use my scroll-wheel).

I've posted to the linuxppc list about this several times, but this is the
first time somebody had a clear-cut explanation.

Here are the appropriate lines in /var/log/XFree86.log, and
/var/log/messages, in case they are useful (this is the video card that
came with my 9500):

XFree86.0.log:

(II) FBDev(0): Hardware: ATY Mach64 (vidmem: 4096k)

messages:

May  9 23:41:16 ip215-176 kernel: MacOS display is /bandit/ATY,XCLAIM 
May  9 23:41:16 ip215-176 kernel: atyfb: mach64GX (ATI888GX00) [0x00d7 rev 0x03] 4M VRAM, 14.31818 MHz XTAL, 135 MHz PLL, 50 Mhz MCLK 
May  9 23:41:16 ip215-176 kernel: Console: switching to colour frame buffer device 128x48 
May  9 23:41:16 ip215-176 kernel: fb0: ATY Mach64 frame buffer device on /bandit/ATY,XCLAIM