RE: [Xen-devel] agp and framebuffer (intelfb) - your milage may vary

["B.G. Bruce" <bgb@xxxxxxxxx>]

Well, you can forget the patch - ti's not needed.  I don't know what I
was doing wrong, but a rebuild from scratch today (same versions of
everything) and it works correctly WITHOUT the patch.  Wednesday, when I
did this (again from scratch)I needed the patch.  I must be losing my
mind, however you can add the intelfb with a 865g chipset to your list
of known working.  It didn't make much sense to me from the start, so
I'll write it off to user error/stupidity on my part.

B.


On Fri, 2005-01-28 at 04:43, Ian Pratt wrote:
> > with the patches/linux-2.6.9/{agpgart,drm}.patch patches applied
> > (shouldn't there be a symlink to linux-2.6.10?) 
> 
> There's an argument that we should automatically apply these patches and
> build AGP and DRM support as modules for our xen0 kernels. It would be
> good to know which drivers have actually been tested and work.
> 
> Rik: did you have any luck feeding the agpgart and drm patches up
> stream? 
> 
> > I would
> > appreciate it if someone who knows the xen agp subsystem (in 
> > particular
> > the agp_acquire_backend) better would look over the intelfb.patch and
> > post any improvements (I don't like taking out the checks made on
> > agp_acquire_backend(), but with them left in, I get "intelfb: cannot
> > acquire agp").
> 
> Which of the error codes is it returning? There's nothing special about
> AGP support on arch xen, its just that Xen is rather stricter about what
> drivers are allowed to get away with, requring some fixes.
> 
> int agp_backend_acquire(void)
> {
>         if (agp_bridge->type == NOT_SUPPORTED)
>                 return -EINVAL;
>         if (atomic_read(&agp_bridge->agp_in_use))
>                 return -EBUSY;
>         atomic_inc(&agp_bridge->agp_in_use);
>         return 0;
> }
> 
> Ian
> 
> 
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