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SubjectRe: [BUG] 2.6.26-rc1 broke X on SPARC Ultra5
>  >
> > > Fatal server error:
> > > xf86MapPciMem: Could not mmap PCI memory [base=0xe2000000,hostbase=0xe2000000,size=2000] (No such file or directory)
> > >
> > > I'll start digging through 2.6.25->2.6.26-rc1 later today,
> > > meanwhile I've put Xorg.0.log, Xorg strace, dmesg, and .config
> > > files for 2.6.25 (working) and 2.6.26-rc4 (failing) in
> > > <http://user.it.uu.se/~mikpe/linux/sparc64-2.6.26-rcN-xorg-bug/>.
> >
> > It's likely this change below. Unfortunately older versions of X
> > seemingly cannot cope with a lack of PCI host controller in the PCI
> > hierarchy exported by the kernel.
> >
> > That's really a bug in X, current libpciaccess based X servers work
> > fine, and the bug fixed by this changeset is not solvable in any other
> > reasonable way. So unfortunately older X verions will stay not
> > working. Sorry.
> >
> > commit c26d3c0138970778fabe114df99dffb34a04b1d7
> > Author: David S. Miller <davem@davemloft.net>
> > Date: Thu May 1 01:12:40 2008 -0700
>
> Confirmed. Reverting this patch from 2.6.26-rc1 made my Xorg-7.1.1 work again.
>
> It's a shame though that a bug fix needs to have such draconian consequences.
>

Wow thats a major userspace regression to ship, we'd never get away
with doing that on x86 platforms.

Dave.


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