KMS/radeon regression: failure to set modes on CEDAR & TAHITI; v3.11 vs 3.12-rc5/rc7

[Jerome Glisse]

On Thu, Nov 7, 2013 at 2:59 PM, Robin H. Johnson <robbat2 at gentoo.org> wrote:

> On Thu, Nov 07, 2013 at 11:52:13AM -0500, Alex Deucher wrote:
> > >> Culprit likely d1e3b5564834ea24dee6b364a172365f64865fe5 try reverting
> that one.
> > > Confirmed as the buggy commit via bisect.
> > > Then reverted in 3.12 and 3.12 suddenly works.
> > I'm not sure how you would even be hitting those code paths as hw i2c
> > is disabled by default and I don't see it enabled on your kernel
> > command line.
> I just wondered about that too, but dug around and found this
>
> $ ls -la /etc/modprobe.d/radeon.conf ; cat /etc/modprobe.d/radeon.conf
> -rw-r--r-- 1 root root 24 Jul  3  2011 /etc/modprobe.d/radeon.conf
> options radeon hw_i2c=1
>
> So that answers that. I'd forgotten I even had that set.
>

Still does my patch fix it ?

Cheers,
Jerome


> --
> Robin Hugh Johnson
> Gentoo Linux: Developer, Trustee & Infrastructure Lead
> E-Mail     : robbat2 at gentoo.org
> GnuPG FP   : 11ACBA4F 4778E3F6 E4EDF38E B27B944E 34884E85
>
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