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

[Robin H. Johnson]

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.

-- 
Robin Hugh Johnson
Gentoo Linux: Developer, Trustee & Infrastructure Lead
E-Mail     : robbat2 at gentoo.org
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