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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Impossible to change pstate on GT610M"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111128">111128</a>
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<th>Summary</th>
<td>Impossible to change pstate on GT610M
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>19.1
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Reporter</th>
<td>gzgagz@zoho.eu
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<th>QA Contact</th>
<td>nouveau@lists.freedesktop.org
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<pre>Hello,
I have an asus UX32VD, with a GT610M inside, which works with the Optimus
architecture, handle by PRIME. The bug is currently with the kernel 5.2.0, but
it have always been like that as far as I remember.
uname -a :
Linux ga-laptop 5.2.0-arch2-1-ARCH #1 SMP PREEMPT Mon Jul 8 18:18:54 UTC 2019
x86_64 GNU/Linux
lspci :
01:00.0 3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M /
GT 620M/625M/630M/720M] (rev a1)
While it is not in use, nouveau shutdown the chipset as expected :
cat /sys/kernel/debug/dri/1/pstate
07: core 270 MHz memory 405 MHz
0f: core 625 MHz memory 900 MHz
DC: core 0 MHz memory 0 MHz
While an app is launched with DRI_PRIME=1, we can see that the chipset is set
to 07 :
DRI_PRIME=1 glxgears &
cat /sys/kernel/debug/dri/1/pstate
07: core 270 MHz memory 405 MHz
0f: core 625 MHz memory 900 MHz
DC: core 270 MHz memory 324 MHz
But when I tried to reclock, I have an error :
echo 0f > /sys/kernel/debug/dri/1/pstate
-bash: echo: write error: Function not implemented
And I have this in dmesg:
[ 351.283183] nouveau 0000:01:00.0: bus: MMIO write of ffff8c1f FAULT at
6013d4 [ IBUS ]
[ 458.362570] nouveau 0000:01:00.0: bus: MMIO write of 0000001f FAULT at
6013d4 [ IBUS ]
Thanks</pre>
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