Bug 38657 - Redwood: power state #4 not used
Summary: Redwood: power state #4 not used
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2011-06-24 15:45 UTC by mkgmafbt
Modified: 2019-11-19 08:20 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Part of dmesg with power states (5.66 KB, text/plain)
2011-06-24 15:45 UTC, mkgmafbt
no flags Details

Description mkgmafbt 2011-06-24 15:45:28 UTC
Created attachment 48390 [details]
Part of dmesg with power states

It's a Sapphire Radeon HD5670 512MB GDDR5. DRM reports 5 power states, but low profile won't use #4, wich is the 2D profile, nor does dynpm. All kernels with Evergreen pm support are affected by this (possible) bug, including 3.0-rc4.

cat /sys/class/drm/card0/device/power_profile 

cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 775000 kHz
current engine clock: 399990 kHz
default memory clock: 950000 kHz
current memory clock: 950000 kHz
voltage: 1100 mV
PCIE lanes: 16

(should be 150/300 MHz 0.9V)

lspci -nn | grep  VGA
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Redwood [Radeon HD 5670] [1002:68d8]
Comment 1 Alex Deucher 2011-06-28 09:00:51 UTC
The last state is a special state that is not used by default.
Comment 2 mkgmafbt 2011-06-28 09:40:38 UTC
Thanks for the reply.
Whats the purpose of this state?
Comment 3 Martin Peres 2019-11-19 08:20:52 UTC
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