Nvidia 450 driver + Ubuntu 20.04 : PRIME Render Offload “On-Demand” not supported

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Hi, ​ I’ve installed Nvidia 450 on new installation of Kubuntu 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. ​ What is wrong ? Thank you for your help. ​ 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 :** Kubuntu 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 [email protected]:~$ __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 [email protected]:~$ 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 ​ [email protected]:~$ 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 ​ https://preview.redd.it/edmrva7okjm51.jpg?width=806&format=pjpg&auto=webp&s=46cdaa2a140f267296854d150d9a219d43ff019b submitted by /u/Olivier_V [link] [comments]

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