Yes. I win. I install new systemd service with timer for power off NVidia after startup.
Problem: New laptop Lenovo S540 (2020-made) + Ubuntu 18.04 LTS with NVidia 435 driver eats battery for 2-3 hours. Result: 12 hours on battery. Before that the actions from comment #43 have been taken (thank, tom (tombuntus)) (I don't install nvidia-prime. I use nvidia-prime, installed with nvidia-driver-435) $sudo apt install bbswitch-dkms add "bbswitch" to /etc/modules add "options bbswitch load_state=0" to /etc/modprobe.d/bbswitch.conf And i have don't change kernel parameter nouveau.modeset Steps for make service: 1 - create file /ets/systemd/system/nvidia-off.service ########################## [Unit] Description=OFF unused NVidia chip (20W->5W) [Service] Type=simple ExecStart=/usr/local/bin/nvidia-off-on-start [Install] WantedBy=multi-user.target ########################## 2 - create file /ets/systemd/system/nvidia-off.timer ########################## [Unit] Description=OFF unused NVidia chip (20W->5W) [Timer] OnStartupSec=1min [Install] WantedBy=multi-user.target ########################## 3 - create executable file /usr/local/bin/nvidia-off-on-start ########################## #!/bin/sh modprobe bbswitch echo "OFF" > /proc/acpi/bbswitch date >> nvidia-off-on-start.log cat /proc/acpi/bbswith >> nvidia-off-on-start.log ######################### 4 - enable and start service $systemctl enable nvidia-off.timer $systemctl status nvidia-off.timer RESULT: - Power of NVidia adapter stay OFF after reboot and login to any user. - $ sudo tlp-stat -b | grep power_now shows 4000-6000 milliWatts - On-Battery time is up to 10-12 hours - Bonus: all coolers stay off. If i select NVidia in Prime-Select (GUI) and reboot, execute "echo "OFF" > /proc/acpi/bbswitch" no have "off" effect and NVidia ready for gaming. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1765363 Title: prime-select intel is not powering off the nvidia card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
