On Tue, 2002-07-16 at 23:02, Charl P. Botha wrote:
>
> The card is a Radeon M7 (LW) in a noname brand laptop with an i845 chipset
> and a Northwood P4.
Interesting, the box I saw the problem on has an Intel 850/820 chipset.
IIRC earlier reports of this problem were from on Athlons though.
> So far, the DRI works wonderfully. glxgears yields a *very* impressive 1700
> - 1800 FPS (with EnablePageFlip). However, when I switch to a VT (which
> works) and then back, the X display mostly restores itself (some colour
> artifacts, almost like we're seeing parts of some back buffer, which we're
> not) but then promptly stops responding. I can still move the mouse
> pointer, but that's it. X consumes 100% cpu according to top. I have to
> shutdown at this point.
>
> What I've tried so far:
> - CVS checkout of DRI source and various crackpot hacks and experiments by
> myself, mostly in RADEON{Enter,Leave}VT
Probably the DMA ring gets stuck and the X server hangs trying to
acquire or fire an indirect buffer. My suspicion is that this is related
to AGP, but I have no evidence to support that. Maybe you can provide
some, see below.
> BTW, I see no interrupt assigned to the Radeon, is this normal?
Yes, we don't use it yet.
> Option "AGPMode" "2"
Does 1x make a difference?
> # Option "CPPIOMode" "true" # run CP in PIO instead of BM
> # # actually just causes OOPS!
This isn't supported, I guess we should remove that option.
> # Option "ForcePCIMode" "On" # not supported by DRI yet
The code is there but not enabled on x86 yet. Can you try with it
enabled? You need to define PCIGART_ENABLED both in the DRM and the 2D
driver. It would also be interesting to know how it works besides VT
switching, see that other thread. Beware that it used to be unstable and
may still crash, but I guess you've gotten used to that. ;)
--
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member / CS student, Free Software enthusiast
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