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Asked: 2019-12-29 12:42:31 +0800 CST

bbswitch unable to turn discrete graphics off

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Laptop: Acer Predator PH315-52 
OS : UBUNTU 18.04.2 LTS 
Nvidia Driver : 418.87 
Kernel : 5.0.0-37-generic 
Processors : Intel UHD 630 and Nvidia 1660 Ti 
bbswitch version: 0.8-4ubuntu1 
bumblebee version: 3.2.1+git20181231-103~bionicppa1

$ grep bumblebeed /var/log/syslog

Output:

Predator bumblebeed[3353]: Received Terminated signal.
Predator bumblebeed[3353]: Unable to disable discrete card.
Predator bumblebeed[7981]: /usr/sbin/bumblebeed started
Predator bumblebeed[7981]: Unable to disable discrete card.

$ lsmod | grep -i nouveau

Output: (Blank output) ## showing nouveau is not loaded

$ lsmod | grep nvidia

Output:

i2c_nvidia_gpu ## Handled it via "$ modprobe -r i2c_nvidia_gpu" but the problem still remains ## and the outputs of all too remains the same ## Blank output of "lsmod | grep nvidia" after unloading it using ablove command

$ cat /proc/acpi/bbswitch

Ouput:0000:01:00.0 ON

$ sudo tee /proc/acpi/bbswitch <<<**OFF**

Output:OFF

$ dmesg | grep bbswitch


[ 6.659422] bbswitch: loading out-of-tree module taints kernel.
[ 6.660407] bbswitch: module verification failed: signature and/or required key missing - tainting kernel
[ 6.661578] bbswitch: version 0.8
[ 6.662580] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[ 6.663575] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[ 6.665690] bbswitch: detected an Optimus _DSM function
[ 6.667873] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[ 18.818552] bbswitch: disabling discrete graphics
[ 114.697607] bbswitch: disabling discrete graphics
[ 114.697852] acpi_thermal_rel intel_pch_thermal wmi_bmof acer_wmi 
acer_wireless intel_lpss mac_hid soundcore sparse_keymap acpi_pad sch_fq_codel parport_pc ppdev lp parport bbswitch(OE) ip_tables x_tables autofs4 hid_generic usbhid i915 kvmgt vfio_mdev mdev vfio_iommu_type1 vfio kvm irqbypass i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm alx ahci mdio i2c_hid libahci i2c_nvidia_gpu hid wmi video pinctrl_cannonlake pinctrl_intel
[ 114.697897] bbswitch_off+0xbb/0x230 [bbswitch]
[ 114.697898] bbswitch_proc_write+0xb5/0xcc [bbswitch]
[ 446.444365] bbswitch: disabling discrete graphics

$ cat /proc/acpi/bbswitch

Ouput:0000:01:00.0 ON #############This is the problem,it should display OFF

$ optirun --status

Output: Bumblebee status: Ready (). X inactive. Discrete video card is on.

Also video LNXVIDEO:00: Failed to change power state to D3hot

Installation steps taken:

$ sudo apt update

Installed Cuda 10.1 .deb package from nvidia website and driver 418.87 was automatically   installed with the package(also prime-select was also installed with it)

$ sudo nano /etc/default/grub

changed - GRUB_CMDLINE_LINUX_DEFAULT='pcie_port_pm=off acpi_backlight=none acpi_osi=Linux acpi_osi=! acpi_osi=\"Windows 2009\"'

$ sudo add-apt-repository ppa:bumblebee/testing

$ sudo apt update

Installed synaptics package manager and then through it installed bumblebee,bumblebee-nvidia   and primus(and all others which by default get installed with them like bbswitch)

$ sudo nano /etc/bumblebee/bumblebee.conf

 Changed 'Driver=' to 'Driver=nvidia'
  Bridge=primus
  KernelDriver=nvidia
  PMMethod=bbswitch
  LibraryPath=/usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu
  XorgModulePath=/usr/lib/x86_64-linux-gnu/xorg,/usr/lib/xorg/modules
  XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

$ sudo nano /etc/modprobe.d/bumblebee.conf

 blacklist nvidia
  blacklist nvidia-current
  blacklist nvidia-current-updates
  blacklist nvidia_drm
  blacklist nvidia_uvm
  blacklist nvidia_modeset
  blacklist nvidiafb
  blacklist i2c-nvidia-gpu
  blacklist i2c-nvidia-gpu
  blacklist nouveau
  blacklist nvidia-current

$ sudo nano /etc/modules-load.d/modules.conf

added following:

   i915

   bbswitch

selected intel as prime profile

Restarted laptop and the above stated problems kicked in.

Also upon startup grep bumblebeed /var/log/syslog shows- Predator bumblebeed[864]: /usr/sbin/bumblebeed started Predator bumblebeed[864]: Unable to disable discrete card.

Please help me solve the problem.

power-management bumblebee nvidia-optimus bbswitch

1 Answers

  1. I have exactly the same problem, on an msi laptop (GS65 stealth).

    I just looked at the lsmod output and tried removing the module manually as well, right now. I'd bump your post but i just created this account.

    Using the nvidia card on adaptive power mode at least saves you more battery (lasts about twice as much).

    EDIT: Disabling or blacklisting the i2c_nvidia_gpu module wont do anything. This module loads by default even when you don't have the nouveau or nvidia drivers installed, it has nothing to do with bumblebee/bbswitch apparently.

    Bumblebee/prime are working correctly at first glance, the nvidia drivers are being deactivated and you're working with the intel integrated graphics, the problem seems to be that somehow, the nvidia GPU is still dragging a lot of power from the computer even when it is not in use (and should be OFF).

    EDIT 2:

    I found this other post regarding powering off the dedicated gpu, maybe this can work for you. I'll try it later:

    https://www.reddit.com/r/linux/comments/78is1r/complete_disable_of_discrete_gpu/

    EDIT3: For me, selecting the Intel prime profile from the nvidia xserver settings (or prime-select intel), logging out then back in, and running

    $ sudo tee /proc/acpi/bbswitch <<<**OFF**

    manually works.

    Are you sure nouveau is completely blacklisted? I had to add balcklist=nouveau to the GRUB_CMDLINE_LINUX_DEFAULT options in /etc/default/grub, and run update-grub, since the blacklist.conf file didn't seem to work.

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