[Bug 98398] [Nouveau] Vgaswitcharoo fails to turn off GPU properly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98398

            Bug ID: 98398
           Summary: [Nouveau] Vgaswitcharoo fails to turn off GPU properly
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/other
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: rick.2889 at gmail.com

Created attachment 127483
  --> https://bugs.freedesktop.org/attachment.cgi?id=127483&action=edit
dmesg output

Using Arch Linux and kernel 4.8.3, I am observing much higher power usage in
powertop when using Nouveau with vgaswitcharoo (~13W) opposed to
NVIDIA/Bumblebee with BBSwitch (~7.5 W).

I initially started noticing this because the battery drained much faster and
the fans started to spin while they otherwise stayed idle.

Attached is my dmesg log.

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