[Dri-devel] Mach64 2D accel problem

[Felix <fx...@gm...>]

Hi mach64 folks,

after several weeks of extreme busyness/absence I am back now and
testing the mach64-0-0-4 and 0-0-5 branches again (still the best I can
do :( ). It's great that you got 2D accel working. However, there is
still one problem.

Moving a GL window caused the X-server to segfault with both the latest
versions of mach64-0-0-4 and 0-0-5. Moving any other window while 3D was
active was no problem. I experimented a bit with this and it turned out
that the problem only occurs when I use 

Option "XaaNoScreenToScreenCopy"

in the Screen section. (I did this since it caused drawing errors in
some situations.)

I got a backtrace of the segfault:

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
#0  0x00000000 in ?? ()
#1  0x08741a5f in ?? ()
#2  0x0825129f in ?? ()
#3  0x0817e351 in miMoveWindow (pWin=0x8912d18, x=0, y=0, pNextSib=0x8939780, 
    kind=VTMove) at miwindow.c:553
#4  0x080d8d17 in ConfigureWindow (pWin=0x8912d18, mask=3, vlist=0x88f2088, 
    client=0x88d5560) at window.c:2507
#5  0x080beda2 in ProcConfigureWindow (client=0x88d5560) at dispatch.c:772
#6  0x080b9608 in Dispatch () at dispatch.c:462
#7  0x080cde39 in main (argc=5, argv=0xbffffb84, envp=0xbffffb9c) at main.c:454

call LoaderPrintSymbol printed this in XFree86.1.log:
0x8741138 ATIInitializeXVideo+927
	Module "/usr/X11R6-mach64005/lib/modules/drivers/atimisc_drv.o"
	Section ".text"
0x82511f0 DRICopyWindow+af
	Module "/usr/X11R6-mach64005/lib/modules/extensions/libdri.a:dri.o"
	Section ".text"

It seems that there is a call to a null pointer in the end. Just a
guess: Could it be a call to the ScreenToScreen copy function which I
disabled in the XF86Config?

Also the glxgears framerate has not increased significantly over the
last few weeks. With physical resolution 640x480 I still get something
around 230. I remember seeing something like 240 with pseudo DMA a long
time ago! Maybe other changes in my system have caused this. Perhaps I
should try it with a non-preemptible kernel again?

Cheer's
   Felix

               __\|/__    ___     ___     ___
__Tschüß_______\_6 6_/___/__ \___/__ \___/___\___You can do anything,___
_____Felix_______\Ä/\ \_____\ \_____\ \______U___just not everything____
  fx...@gm...    >o<__/   \___/   \___/        at the same time!