@Aurelijus: please follow these steps for testing:
1) Enable the bionic-proposed repositories 2) Create /etc/apt/preferences.d/proposed-updates with the following content: Package: * Pin: release a=bionic-proposed Pin-Priority: 400 3) Update the list of packages: sudo apt-get update 4) Install the packages from -proposed using the following command: sudo apt install nvidia-driver-390/bionic-proposed gdm3/bionic-proposed ubuntu-drivers-common/bionic-proposed nvidia-prime/bionic-proposed nvidia-settings/bionic-proposed ** Description changed: SRU Request: [Impact] Relying on the nouveau driver and on the vga switcheroo (to get around a change in systemd LP: #1777099) caused increased power consumption, and slowed down the switching process. Furthermore, if the main X/Xwayland session was started by Gdm when the nvidia driver was loaded, the session will keep the nvidia module loaded, and prevent the system from switching off the dGPU. Also, the nouveau driver will be loaded, if nvidia is not, and this can cause problems to unsupported NVIDIA GPUs. The solution involves the following changes: 1) Solving the problem in systemd (LP: #1777099) 2) Adding code in gpu-manager and in nvidia-prime to unload the nvidia modules, and to allow the PCI device to sleep. 3) Making a slight change to the current patch in Gdm, used to call the PRIME scripts before and after a Gdm session (so that gpu-manager gets actually called on log out) 4) Adding code in gpu-manager to kill the main X/Xwayland session on log out, if the session is preventing us from unloading the nvidia driver. A new X/Xwayland session will be created after unload the module. 5) Removing the systemd service that loads nouveau from the nvidia packages. - [Test Case] - 1) Enable the -proposed repository, and install the new "ubuntu-drivers-common", nvidia drivers, nvidia-prime, and gdm3 + 1) Enable the -proposed repository, and install the new "ubuntu-drivers-common", nvidia drivers, nvidia-prime, and gdm3 * 2) Make sure the nvidia packages are installed, and enable performance mode (if it is already enabled, call "sudo prime-select intel" first): sudo prime-select nvidia 3) Restart your computer and attach your /var/log/gpu-manager.log. see if the system boots correctly. If unsure, please attach your /var/log /gpu-manager.log and /var/log/Xorg.0.log 4) Select power saving mode: sudo prime-select intel 5) Log out and log back in 6) Check if the nvidia driver is still loaded: lsmod | grep nvidia - [Regression Potential] Low, as hybrid graphics support does not work correctly, and the changes only affect this use case. + + + _____________________________________ + * Steps to test the updates: + + 1) Enable the bionic-proposed repositories + + 2) Create /etc/apt/preferences.d/proposed-updates with the following + content: + + Package: * + Pin: release a=bionic-proposed + Pin-Priority: 400 + + 3) Update the list of packages: + + sudo apt-get update + + 4) Install the packages from -proposed using the following command: + + sudo apt install nvidia-driver-390/bionic-proposed gdm3/bionic-proposed + ubuntu-drivers-common/bionic-proposed nvidia-prime/bionic-proposed + nvidia-settings/bionic-proposed -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1778011 Title: SRU: PRIME Power Saving mode draws too much power To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1778011/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
