Many laptops have two graphics; Intel, which saves power, and Nvidia, which gives better performance.
There are several options to use switchable graphics, PRIME, Bumblebee, nvidia-xrun…
None of these programs functions perfectly, there is always a problem. For example, Nvidia is still active in the background so there is not any power saving or Nvidia works but with any issue (games in Steam doesn’t work or not well)
At the end I choose to play any video game and then find a way to disable Nvidia when I want.
Following Archlinux Nvidia guide, I created an Ansible playbook to enable and disable Nvidia
---
- name: Nvidia DRM switch (disable)
hosts: localhost
become: yes
tasks:
- name: X11
ansible.builtin.file:
path: /etc/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf
state: absent
- name: SDDM
blockinfile:
path: /usr/share/sddm/scripts/Xsetup
insertafter: |
#!/bin/sh
# Xsetup - run as root before the login dialog appears
block: ""
- name: GRUB
ansible.builtin.lineinfile:
path: /etc/default/grub
regexp: '^GRUB_CMDLINE_LINUX_DEFAULT='
line: GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet resume=/dev/mapper/Vol-swap"
register: grub
- name: Modules
ansible.builtin.lineinfile:
path: /etc/mkinitcpio.conf
regexp: '^MODULES='
line: MODULES=()
register: modules
- name: Backlist modules
blockinfile:
path: /etc/modprobe.d/blacklist.conf
block: |
blacklist nvidia
blacklist nvidia_modeset
blacklist nvidia_uvm
blacklist nvidia_drm
- name: Re-generate the grub.cfg
ansible.builtin.command: grub-mkconfig -o /boot/grub/grub.cfg
when: grub.changed
- name: Re-generate image
ansible.builtin.command: mkinitcpio -P
when: modules.changed
---
- name: Nvidia DRM switch (enable)
hosts: localhost
become: yes
tasks:
- name: X11
ansible.builtin.copy:
src: "{{ playbook_dir }}/10-nvidia-drm-outputclass.conf"
dest: /etc/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf
owner: root
group: root
mode: '0644'
- name: SDDM
blockinfile:
path: /usr/share/sddm/scripts/Xsetup
insertafter: |
#!/bin/sh
# Xsetup - run as root before the login dialog appears
block: |
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto
- name: GRUB
ansible.builtin.lineinfile:
path: /etc/default/grub
regexp: '^GRUB_CMDLINE_LINUX_DEFAULT='
line: GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet resume=/dev/mapper/Vol-swap nvidia-drm.modeset=1"
register: grub
- name: Modules
ansible.builtin.lineinfile:
path: /etc/mkinitcpio.conf
regexp: '^MODULES='
line: MODULES=(nvidia nvidia_modeset nvidia_uvm nvidia_drm)
register: modules
- name: Re-generate the grub.cfg
ansible.builtin.command: grub-mkconfig -o /boot/grub/grub.cfg
when: grub.changed
- name: Re-generate image
ansible.builtin.command: mkinitcpio -P
when: modules.changed
The changes require a reboot the laptop but since I don’t play every day this issue is acceptable for me.
There are two more commands to execute when you are using the battery:
# echo '\_SB.PCI0.PEG0.PEGP._OFF' > /proc/acpi/call
# rmmod nvidia
These commands increase three or four hour using the battery, I will research how to add them to my /etc/acpi/handler.sh script to run automatically.
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