"For me 'On Demand' should be automatic." That is not how Nvidia is using the term: https://download.nvidia.com/XFree86/Linux-x86_64/450.66/README/primerenderoffload.html Again, automatic/seamless switching is not available on Linux.
"I only have nvidia GPU working (and consumption about 10W) when using the prefix" That is expected. Just querying the GPU will not be enough to to ramp it up to full power. You can try nvidia-smi when you're running something demanding on the GPU and you'll likely see more power usage. "In nvidia-settings I don't have a PRIME Profiles" That is an issue. But keep in mind that is only a glorified GUI way of using 'sudo prime-select' It wouldn't change anything since 'prime-select query' already shows you're already in on-demand mode. ** Summary changed: - PRIME Render Offload "On-Demand" not supported + PRIME Profiles Not Shown in nvidia-settings ** Package changed: nvidia-graphics-drivers-450 (Ubuntu) => nvidia- settings (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-settings in Ubuntu. https://bugs.launchpad.net/bugs/1895327 Title: PRIME Profiles Not Shown in nvidia-settings Status in nvidia-settings package in Ubuntu: New Bug description: Hi, I've installed Nvidia 450 on new installation of Ubuntu 20.04.1. Prime Render Offload works in manual mode with `__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia` But nvidia-settings says prime is not supported. And so I have no prime entry in the nvidia window. So I think the swith between integrated and nvidia GPU will not be automatic and the "on demand" does not work. I asked nvidia developpers and they said it should be a ubuntu patch : https://forums.developer.nvidia.com/t/prime-no-offloading-required-prime-is-it-supported/154181 **Computer :** Asus A17-TUF766IU-H7074T **OS Details :** Ubuntu 20.04.1 with mainline 5.8.8 kernel Nvidia Driver version : 450.66 Desktop Environment : Plasma Window Manager : KDE **Hardware Details** Processor : AMD Ryzen 4800H GPU : GeForce GTX 1660 Ti 6 Go meloli@Asus-A17:~$ __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia glxinfo | egrep "(OpenGL vendor|OpenGL renderer|OpenGL version)" OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GTX 1660 Ti/PCIe/SSE2 OpenGL version string: 4.6.0 NVIDIA 450.66 meloli@Asus-A17:~$ glxinfo | egrep "(OpenGL vendor|OpenGL renderer|OpenGL version)" OpenGL vendor string: X.Org OpenGL renderer string: AMD RENOIR (DRM 3.38.0, 5.8.8-050808-generic, LLVM 10.0.0) OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.0.8 meloli@Asus-A17:~$ nvidia-settings (nvidia-settings:29678): GLib-GObject-CRITICAL **: 18:02:06.777: g_object_unref: assertion 'G_IS_OBJECT (object)' failed ERROR: nvidia-settings could not find the registry key file. This file should have been installed along with this driver at /usr/share/nvidia/nvidia-application-profiles-key-documentation. The application profiles will continue to work, but values cannot be prepopulated or validated, and will not be listed in the help text. Please see the README for possible values and descriptions. ** Message: 18:02:06.835: PRIME: No offloading required. Abort ** Message: 18:02:06.835: PRIME: is it supported? no meloli@Asus-A17:~$ apt-cache policy nvidia-driver-450 nvidia-driver-450: Installé : 450.66-0ubuntu0.20.04.1 Candidat : 450.66-0ubuntu0.20.04.1 Table de version : *** 450.66-0ubuntu0.20.04.1 500 500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-settings/+bug/1895327/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
