[Bug 71994] New: Can't set performance level on Fermi card, Linux 3.13

[Bug 71994] New: Can't set performance level on Fermi card, Linux 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=71994

          Priority: medium
            Bug ID: 71994
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: Can't set performance level on Fermi card, Linux 3.13
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: anakin.cs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
          Hardware: Other
            Status: NEW
           Version: 9.2
         Component: Drivers/DRI/nouveau
           Product: Mesa

Created attachment 89753
  --> https://bugs.freedesktop.org/attachment.cgi?id=89753&action=edit
kernel log

I guess reclocking is supposed to work with Linux 3.13 with Fermi cards (I have
a GT 540M), but it doesn't seem to on mine:

# cat /sys/class/drm/card0/device/pstate 
03: core 50 MHz memory 135 MHz
07: core 202 MHz memory 324 MHz
0f: core 672 MHz memory 800 MHz
--: core 0 MHz memory 0 MHz *

# echo "0f" > /sys/class/drm/card0/device/pstate 
bash: echo: erreur d'écriture : Fonction non implantée

It means in English:
bash: echo: write error : Function not implemented

Am I doing anything wrong ?

I'm on ArchLinux.
linux-mainline 3.13rc1-1
nouveau-dri 9.2.3-2

Best regards,

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[Bug 71994] Can't set performance level on Fermi card, Linux 3.13

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=71994

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #1 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Nope, not supposed to work.

Feel free to apply the equivalent of
http://cgit.freedesktop.org/~darktama/nouveau/commit/?h=devel-pm&id=ffbf93ba1eb5f05d22bd5419e5f314188801155b
to your kernel, and if you want memory reclocking in addition to engine
reclocking, you can boot with nouveau.config=NvMemExec=1. However at this point
we're not interested in whether it works or not -- it (probably) doesn't on a
whole bunch of cards.

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[Bug 71994] Can't set performance level on Fermi card, Linux 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=71994

--- Comment #2 from anakin.cs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org ---
Thanks. It doesn't work on my 8800GT either (used to work with the older
performance_level setting), I guess this'll solve it as well?

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