From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 202043] amdgpu: Vega 56 SCLK drops to 700 Mhz when undervolting
Date: Wed, 20 Mar 2019 07:40:36 +0000 [thread overview]
Message-ID: <bug-202043-2300-dfFrVw5ujg@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-202043-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=202043
Ivan Avdeev (lists@w23.ru) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lists@w23.ru
--- Comment #4 from Ivan Avdeev (lists@w23.ru) ---
I have the very same issue on Vega 64. Changing any voltage value from stock
even by 1mV leads to severe throttling.
E.g.:
```
echo "manual" > $DEV/power_dpm_force_performance_level
echo "2" > $DEV/pp_sclk_od
echo "2" > $DEV/pp_mclk_od
echo "s 7 1663 1190" > $DEV/pp_od_clk_voltage # stock = 1200
echo "c" > $DEV/pp_od_clk_voltage
```
Will result in 0.5x performance and stutter.
This doesn't happen on windows on the same hardware.
Card: MSI Radeon RX Vega 64 Air Boost 8G OC
Kernels tried: 4.20, 5.0-rc2, 5.0.2
Mesa: 18.3.3, 18.3.4
MB: ASUS Prime X399-A, bios 0808
CPU: Threadripper 1950X
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next prev parent reply other threads:[~2019-03-20 7:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-22 12:24 [Bug 202043] New: amdgpu: Vega 56 SCLK drops to 700 Mhz when undervolting bugzilla-daemon
2018-12-22 15:31 ` [Bug 202043] " bugzilla-daemon
2018-12-24 13:05 ` bugzilla-daemon
2018-12-26 19:39 ` bugzilla-daemon
2019-03-20 7:40 ` bugzilla-daemon [this message]
2019-03-20 7:45 ` bugzilla-daemon
2019-03-27 0:41 ` bugzilla-daemon
2019-03-27 0:45 ` bugzilla-daemon
2019-09-29 5:04 ` bugzilla-daemon
2019-10-31 13:07 ` bugzilla-daemon
2021-02-08 18:22 ` bugzilla-daemon
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