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<body><span class="vcard"><a class="email" href="mailto:pedram.navid@gmail.com" title="pedram.navid@gmail.com">pedram.navid@gmail.com</a>
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<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Power management doesn't work on dualhead"
href="https://bugs.freedesktop.org/show_bug.cgi?id=42854">bug 42854</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">CC</td>
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<td>pedram.navid@gmail.com
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Power management doesn't work on dualhead"
href="https://bugs.freedesktop.org/show_bug.cgi?id=42854#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Power management doesn't work on dualhead"
href="https://bugs.freedesktop.org/show_bug.cgi?id=42854">bug 42854</a>
from <span class="vcard"><a class="email" href="mailto:pedram.navid@gmail.com" title="pedram.navid@gmail.com">pedram.navid@gmail.com</a>
</span></b>
<pre>I should add that using the proprietary ATI drivers on Linux, dual-head is cool
and quiet as well</pre>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Power management doesn't work on dualhead"
href="https://bugs.freedesktop.org/show_bug.cgi?id=42854#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Power management doesn't work on dualhead"
href="https://bugs.freedesktop.org/show_bug.cgi?id=42854">bug 42854</a>
from <span class="vcard"><a class="email" href="mailto:pedram.navid@gmail.com" title="pedram.navid@gmail.com">pedram.navid@gmail.com</a>
</span></b>
<pre>I can confirm this issue as well. Latest 1.7 drivers. This is very clearly a
bug. Dual output in Windows does not lead to maxing out the engine or memory
clocks. There is no way simple 2d output requires the same amount of work from
the GPU as graphics-intesive 3D games.
With two DVI outputs:
---------------------
cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 800000 kHz
current engine clock: 799940 kHz
default memory clock: 1250000 kHz
current memory clock: 1250000 kHz
cat /sys/class/drm/card0/device/power_method
profile
cat /sys/class/drm/card0/device/power_profile
low
sensors
radeon-pci-0100
Adapter: PCI adapter
temp1: +62.5 C
With one DVI output
--------------------
cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 800000 kHz
current engine clock: 249990 kHz
default memory clock: 1250000 kHz
current memory clock: 150000 kHz
Adapter: PCI adapter
temp1: +53.0 C (less than 30 seconds after switching)
Adapter: PCI adapter
temp1: +42.5 C (stablized after a few mins)</pre>
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