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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [dpm] rs880: Power usage doesn't drop with dpm=1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67321">67321</a>
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
</td>
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<th>Summary</th>
<td>[dpm] rs880: Power usage doesn't drop with dpm=1
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>All
</td>
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<th>Reporter</th>
<td>suse@kabelfunk.de
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<th>Hardware</th>
<td>x86 (IA32)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>Driver/Radeon
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<th>Product</th>
<td>xorg
</td>
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<pre>My laptop (Lenovo Edge 11) has the Mobility Radeon HD 4200 Series chip (RS880M)
(windows says it's a HD 4225)
It consume with fglrx ~16W. (kernel 3.4.47)
With radeon (kernel 3.11-rc2) and power_profile=low ~20W
With radeon.dpm=1 (kernel 3.11-rc2) ~20W
linux-7goe:/home/dom # echo battery
<span class="quote">>/sys/class/drm/card0/device/power_dpm_state</span >
linux-7goe:/home/dom # echo low>
/sys/class/drm/card0/device/power_dpm_force_performance_level
linux-7goe:/home/dom # modprobe ec_sys
linux-7goe:/home/dom # cat /sys/kernel/debug/dri/64/radeon_pm_info
uvd vclk: 0 dclk: 0
power level 0 sclk: 20000 vddc_index: 1
The fglrx still uses ~4W less than radeon.dpm=1
It would be great when radeon.dpm=1 uses as less power as the fglrx driver.</pre>
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