On Thu, 23 Jun 2011 10:11:26 -0700, Jesse Barnes <jbar...@virtuousgeek.org> 
wrote:
> I tested again and things were working as expected.  This patch adds a
> debugfs file for dumping the ring freq table, can you guys test it out
> (try disabling the call to update the table, dump it, make sure it's 0,
> then re-enable and make sure it's programmed correctly).

According to the debugfs, your defaults should be effective:

sandybridge:~$ cat /sys/kernel/debug/dri/1/i915_ring_freq_table 
GPU freq        Effective CPU freq
850             0 -> 1600
900             0 -> 1700
950             0 -> 1800
1000            0 -> 1800
1050            0 -> 1900
1100            0 -> 2000

I'll give the tyres another kick and see if I can spot any differences.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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