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[SOLVED] Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle

From piorunz <piorunz@gmx.com>
Newsgroups linux.debian.user
Subject [SOLVED] Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle
Date 2021-07-24 05:40 +0200
Message-ID <CEgG5-8i1-1@gated-at.bofh.it> (permalink)
References <CEahk-4gf-9@gated-at.bofh.it> <CEbdn-4Oh-3@gated-at.bofh.it> <CEbZM-5k1-9@gated-at.bofh.it> <CEc9s-5np-5@gated-at.bofh.it>
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On 23/07/2021 23:44, The Wanderer wrote:
> https://gitlab.freedesktop.org/drm/amd/-/issues/1632  as being an
> upstream(?) bug report which covers it. Not sure how directly applicable
> those are, but just in case...

That escalated very quickly :D This bug is responsible for this. And 
patch works.

I compiled my own 5.10 kernel using Debian source, and I patched that 
one line in drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c file. Now I rebooted 
to my custom 5.10 kernel and it works :)

Let's see - before:

$ sensors
(...)
amdgpu-pci-0900
(...)
power1:       74.00 W  (cap = 272.00 W)

gpu-mon (from rickslab-gpu-utils)
┌─────────────┬────────────────────┐
│Card #       │card0               │
├─────────────┼────────────────────┤
│Model        │ Navi 21 RX         │
│GPU Load %   │99                  │
│Mem Load %   │0                   │
│VRAM Usage % │4.839               │
│GTT Usage %  │0.802               │
│Power (W)    │75.0                │
│Power Cap (W)│272.0               │
│Energy (kWh) │0.0                 │
│T (C)        │53.0                │
│VddGFX (mV)  │1143                │
│Fan Spd (%)  │0                   │
│Sclk (MHz)   │2470                │
│Sclk Pstate  │1                   │
│Mclk (MHz)   │1000                │
│Mclk Pstate  │3                   │
│Perf Mode    │0-BOOTUP_DEFAULT    │
└─────────────┴────────────────────┘

And after:

$ sensors
(...)
amdgpu-pci-0900
(...)
power1:       34.00 W  (cap = 272.00 W)

┌─────────────┬────────────────────┐
│Card #       │card0               │
├─────────────┼────────────────────┤
│Model        │ Navi 21 RX         │
│GPU Load %   │0                   │
│Mem Load %   │0                   │
│VRAM Usage % │6.109               │
│GTT Usage %  │1.147               │
│Power (W)    │35.0                │
│Power Cap (W)│272.0               │
│Energy (kWh) │0.004               │
│T (C)        │54.0                │
│VddGFX (mV)  │856                 │
│Fan Spd (%)  │0                   │
│Sclk (MHz)   │500                 │
│Sclk Pstate  │0                   │
│Mclk (MHz)   │1000                │
│Mclk Pstate  │3                   │
│Perf Mode    │0-BOOTUP_DEFAULT    │
└─────────────┴────────────────────┘

0% GPU core use, 0% memory use, core clock is 500 MHz instead of maxed 
out at 2470 Mhz. Success!
Power usage is on par with Windows.
However, I still have 34W even if I disconnect second monitor. On 
Windows, with one monitor only power goes down to 10W and core is 10 
MHz. But my default setup it 2 monitors so I don't worry too much anyway :)

-- 

With kindest regards, piorunz.

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⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org
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Thread

Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-23 22:50 +0200
  Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle The Wanderer <wanderer@fastmail.fm> - 2021-07-23 23:50 +0200
    Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle Dan Ritter <dsr@randomstring.org> - 2021-07-24 00:40 +0200
      Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle The Wanderer <wanderer@fastmail.fm> - 2021-07-24 00:50 +0200
        Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-24 01:10 +0200
          Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle "tv.debian@googlemail.com" <tv.debian@googlemail.com> - 2021-07-24 10:20 +0200
            Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-24 16:40 +0200
          Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-24 21:30 +0200
            Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle "tv.debian@googlemail.com" <tv.debian@googlemail.com> - 2021-07-25 11:00 +0200
            Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-25 18:20 +0200
        [SOLVED] Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-24 05:40 +0200
          Re: [SOLVED] Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-31 23:30 +0200
            Re: [SOLVED] Radeon 6800 XT: 100% GPU core usage & 74 Watts when  idle The Wanderer <wanderer@fastmail.fm> - 2021-08-01 14:40 +0200
    Re: Radeon 6800 XT: 100% GPU core usage & 74 Watts when idle piorunz <piorunz@gmx.com> - 2021-07-24 01:10 +0200

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