Bug#813848: bumblebee: bbswitch will not disable nvidia card after optirun finishes.

[Gary Preston]

Package: bumblebee
Version: 3.2.1-10~bpo8+1
Severity: normal

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Dear Maintainer,

   * What led up to the situation?

   Installed nvidia-kernel-dkms 352 from jessie-backports.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

   After installation, rebooted and found that after running 
   optirun for the first time, /proc/acpi/bbswitch would still
   report ON after optirun had finished.

   Stopping the bumblebeed service and "rmmod nvidia" then running
   bumblebeed -vv showed everything was normal during start up, 
   however upon quitting optirun the log shows:


[  341.192631] [DEBUG]Socket closed.
[  341.192746] [DEBUG]Socket closed.
[  341.192751] [INFO]Stopping X server
[  341.264275] [DEBUG]Process with PID 3275 returned code 0
[  341.264357] [INFO]Unloading nvidia driver
[  341.264443] [DEBUG]Process modprobe started, PID 3296.
modprobe: FATAL: Module nvidia not found.
[  341.264997] [DEBUG]Process with PID 3296 returned code 1
[  344.270780] [ERROR]Unloading nvidia driver timed out.
[  344.270810] [DEBUG]Drivers are still loaded, unable to disable card
[  344.270823] [DEBUG][XORG] (II) UnloadModule: "mouse"
[  344.270826] [DEBUG][XORG] (II) NVIDIA(GPU-0): Deleting GPU-0
[  344.270828] [DEBUG][XORG] (EE) Server terminated successfully (0).
Closing log file.

  The "nvidia" kernel module remained loaded and bbswitch was
  unable to switch the nvidia card to OFF. Running "modprobe -r
  nvidia" manually brought up the same error, instead I had to
  run either:

  modprobe -r nvidia-current

  or 

  rmmod nvidia

  If I create a sym link from nvidia-current.ko to nvidia.ko and
  from nvidia-current-uvm.ko to nvidia-uvm.ko then run depmod -a
  everything then works as expected.

  /etc/nvidia/nvidia-modprobe.conf contains what looks to be
  suitable aliases to allow modprobe -r nvidia to unload
  nvidia-current however I'm not sure if that file is loaded or
  how to check.

  Either way, it looks like bumblebee is unable to unload the
  nvidia module that was loaded via nvidia-current and in turn
  that is causing bbswitch to be unable to disable the dedicated
  graphics card.


- -- System Information:
Debian Release: 8.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages bumblebee depends on:
ii  bbswitch-dkms        0.8-1
ii  dpkg                 1.17.26
ii  init-system-helpers  1.22
ii  libbsd0              0.7.0-2
ii  libc6                2.19-18+deb8u2
ii  libglib2.0-0         2.42.1-1
ii  libx11-6             2:1.6.2-3

Versions of packages bumblebee recommends:
ii  primus  0~20140711-1

Versions of packages bumblebee suggests:
ii  bumblebee-nvidia  3.2.1-10~bpo8+1

- -- Configuration Files:
/etc/bumblebee/bumblebee.conf changed:
[bumblebeed]
VirtualDisplay=:8
KeepUnusedXServer=false
ServerGroup=bumblebee
TurnCardOffAtExit=false
NoEcoModeOverride=false
Driver=nvidia
XorgConfDir=/etc/bumblebee/xorg.conf.d
[optirun]
Bridge=auto
VGLTransport=proxy
PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus:/usr/lib/primus:/usr/lib32/primus
AllowFallbackToIGC=false
[driver-nvidia]
KernelDriver=nvidia-current
PMMethod=auto
LibraryPath=/usr/lib/x86_64-linux-gnu/nvidia:/usr/lib/i386-linux-gnu/nvidia:/usr/lib/nvidia
XorgModulePath=/usr/lib/nvidia,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
[driver-nouveau]
KernelDriver=nouveau
PMMethod=auto
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau

/etc/bumblebee/xorg.conf.nvidia changed:
Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false"
    Option      "AutoAddGPU" "false"
EndSection
Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nvidia"
    VendorName  "NVIDIA Corporation"
    BusID "PCI:01:00:0"
    Option "ProbeAllGpus" "true"
    Option "NoLogo" "true"
    Option "UseEDID" "false"
    Option "UseDisplayDevice" "none"
EndSection
Section "Screen"
    Identifier "Default Screen"
    Device "DiscreteNvidia"
EndSection


- -- no debconf information

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