[Bug 60523] Radeon DPM not working with 2 monitors attached to Radeon HD5770 (Juniper)

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https://bugzilla.kernel.org/show_bug.cgi?id=60523

--- Comment #43 from Nathan Jones <crshbndct@gmail.com> ---
I can reproduce it in Gentoo with 3.11.0, GCC 4.6.3. GPU Temperature is 25C (as
reported by lm-sensors) with any UVD accelerated media playing, and "cat
/sys/kernel/debug/dri/0/radeon_pm_info" shows:

uvd    vclk: 50000 dclk: 40000
power level 2    sclk: 40000 mclk: 90000 vddc: 950 vddci: 1100

As soon as I stop playing media, it stays at the lower power level, but even
scrolling a web page makes it switch to:

uvd    vclk: 0 dclk: 0
power level 2    sclk: 85000 mclk: 120000 vddc: 1250 vddci: 1100

And the temperature creeps up to 34C.

ASUS EAH5770 CUCore 2DI/1GD5 is the model of my GPU.

This only happens with two monitors attached, and I tried the patch in Comment
39, but the behavior did not change. With a single monitor it drops to 157/300,
and switches back and forth like it should. For me the problem is not so
severe, since even extended GPU load at 100% still doesn't put me over 40C, but
it would be nice if it worked with Multimonitor as well as with single..

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