R Shapiro schrieb:

Specifics: with the ati driver selected, xf throws away my mode def,
since it thinks (incorrectly) that there isn't enough vram,

Does it probe the correct amount of VRAM? Do you use Option "UseFBDev" ?

and then quits since it can't find any valid modes. In both cases I'm
running 4.0.1 from Franz Sirl's linuxppc page.

While we're at it, can you please send me the URL of those?

I also tried 4.0.0 from the Howarth page and got exactly the same results.

I think they're too old to work with Mach based ATI chips.

I haven't tried compiling xf myself but I'm perfectly willing to do so if
that's likely to help (eg if there are some known ati patches missing from
the Sirl rpms).

I thought they contained the necessary stuff from Ani Joshi's rsync tree. If
you try to build yourself, you absolutely need that.

The rev. a machine is running 2.2.15pre3 from the 2000 cd, booted via
BootX with "no video driver" checked.

I don't think this can work with the ati driver, it needs atyfb.

The rev. b machine is running a 2.2.16 kernel compiled from kernel.org
sources, booted directly from OF.  Both are started with kernel args
video=atyfb:vmode:20,cmode:16.

I can run xf 4.0.x using the fbdev driver, more or less, with an
otherwise identical XF86Config, though xf with fbdev is noticably
slower than Xpmac.rev10.

No big surprise as the fbdev driver doesn't have any hardware acceleration.

Also the screen is oddly "wrapped" on the rage II machine with the fbdev
driver: I can see the full screen but the virtual edge starts about 75% in,
instead of matching the physical edge, and then wraps around.  I don't see
this artifact on the rage pro G3.

This is a known problem, which is also kind of fixed in Ani's tree AFAIK. I'm
currently working with Geert Uytterheuven to get the definite fix.

Eventually I want to get multiple monitors going.  I already have what
I think is a valid config file for it, but I'm guessing I'll never be
able to do it with fbdev.

That should work if you have multiple framebuffer devices. Use

    Option	"fbdev" "/dev/fb1"

for the second one etc.


Michel


--
Earthling Michel Dänzer (MrCooper)  \  CS student and free software enthusiast
Debian GNU/Linux (powerpc,i386) user \   member of XFree86 and The DRI Project

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