bbswitch turn off

Is there a file called "/proc/acpi/bbswitch" ? 6. bbswitch refuses to turn off card. Try adding: root # "acpi_osi=!Windows\x202013" acpi_osi=Linux nogpumanager i915.enable_hd_vgaarb=1 enable_hd_vgaarb=1. $ dmesg |tail -1 bbswitch: device 0000:01:00.0 is in use by driver 'nouveau', refusing OFF. The state shown in /proc/acpi/bbswitch stays on 'ON' independent of load_state and manual setting. Bumblebee and bbswitch got installed properly but bbswitch fails to turn off discrete graphics. 我们可以将驱动nouveau模块卸载 $ rmmod nouveau. sudo apt-get install bbswitch. This guide will show you how you can use Optimus in order to optimize battery performace. After a reboot, the nvidia card will be off. Discrete card works fine but bug leads to high battery consumption. tee /proc/acpi/bbswitch <<< OFF. dmesg|grep bbswitch gives this: BBswitch does not turn off my GPU when its not in use. You can see the results using : dmesg. I haven't installed NVIDIA drivers and am using the default nouveau drivers for graphics. 7. It will turn off your card. Then I logged in to Gnome and gpu immediately turned on. to your kernel command-line (this has worked for a couple of users, especially those with Thinkpads and Lenovo laptops). bbswitch is a kernel module for toggling the power on nVidia Optimus video cards. and what does "cat /proc/acpi/bbswitch" displays (should see "OFF" if using intel) ? Also tried logging in to Plasma, same result. I started SDDM with 'systemctl start sddm', Nvidia was still off. 5. Switch off the card. This can be seen by querying bbswitch's status: $ cat /proc/acpi/bbswitch To force the card to turn on/off respectively run: # tee /proc/acpi/bbswitch <<