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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 108379] high idle power consumption
Date: Tue, 16 Oct 2018 03:37:54 +0000	[thread overview]
Message-ID: <bug-108379-502@http.bugs.freedesktop.org/> (raw)


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https://bugs.freedesktop.org/show_bug.cgi?id=108379

            Bug ID: 108379
           Summary: high idle power consumption
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: grmat@sub.red

system:
- Polaris10 (Ellesmere)
- Linux 4.18.14
- WQHD (2560*1440 pixels) monitor with 144 Hz (DisplayPort)

expected behaviour:
GPU power states should be lowered to the minimum states while idling to save
power, heat and noise.

actual behaviour:
- DC on (default):
  GPU stuck at highest SCLK DPM state, power consumption as per amdgpu_pm_info
is ~24 Watts

- amdgpu.dc=0:
  MCLK stuck at high DPM state, power consumption as per amdgpu_pm_info is ~26
Watts

- Windows:
  correct (lowest) SCLK/MCLK DPM states, measured power consumption is ~16
Watts lower compared to Linux


Note: https://bugzilla.kernel.org/show_bug.cgi?id=201275 fixed a regression
causing *additional* power draw (SCLK and MCLK both at max, power consumption
at ~38 Watts while idling).

I can't tell if it's a regression as I've just recently got the GPU. Randomly
tested kernels from within 4.17 to 4.18.14 all suffer from this issue.

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             reply	other threads:[~2018-10-16  3:37 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-16  3:37 bugzilla-daemon [this message]
2018-10-16 15:43 ` [Bug 108379] high idle power consumption bugzilla-daemon
2018-10-19 15:31 ` bugzilla-daemon
2018-10-19 15:31 ` bugzilla-daemon
2018-10-19 15:36 ` bugzilla-daemon
2019-01-23  2:56 ` bugzilla-daemon
2019-06-29  6:31 ` bugzilla-daemon
2019-11-02 14:34 ` bugzilla-daemon
2019-11-19  8:59 ` bugzilla-daemon

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