[mantic] Nvidia GPU not detected using on-demand

[Francois Thirioux]

Hi,

Laptop: Legion with Intel + Nvidia 3070 gpu

I reported https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2033735 but I realize this could be a GNOME (including gdm?) issue. That's not a hardware failure as W11+hdmi is working with on-demand. That's not Nvidia-535 related since I get the same bug using Nouveau.

- Using Nvidia dGPU: all is ok (well, in a X11 session!)

- Using dynamic graphics:
--- Nvidia gpu is not listed in g-c-c system details (only Intel gpu is listed)
--- App menu's option to launch with dGPU is missing
--- HDMI monitor is not detected

When I boot, I notice in gdm's screen that my monitor is not activated (full black). It is when I use Nvidia dGPU-only mode. So that's not only a GS stuff, as far as I can see.

I get this related to Nvidia in logs:

13:51:23 systemd: Started app-gnome-nvidia\x2dsettings\x2dautostart-3974.scope - Application launched by gnome-session-binary.
13:51:14 Xorg: (II) config/udev: Adding input device HDA NVidia HDMI/DP,pcm=9 (/dev/input/event18)
13:51:11 systemd: Started nvidia-persistenced.service - NVIDIA Persistence Daemon.
13:51:11 nvidia-persiste: Local RPC services initialized
13:51:11 systemd: Starting nvidia-persistenced.service - NVIDIA Persistence Daemon...
13:51:10 kernel: nvidia-uvm: Loaded the UVM driver, major device number 508.
13:51:10 kernel: nvidia_uvm: module uses symbols nvUvmInterfaceDisableAccessCntr from proprietary module nvidia, inheriting taint.
13:51:10 kernel: [drm:nv_drm_probe_devices [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to register device
13:51:10 kernel: [drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to allocate NvKmsKapiDevice
13:51:10 kernel: input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input32
13:51:10 kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
13:51:10 kernel: nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 535.104.05 Sat Aug 19 00:59:57 UTC 2023
13:51:10 kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module 535.104.05 Sat Aug 19 01:15:15 UTC 2023
13:51:10 kernel: nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
13:51:10 kernel: nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
13:51:10 kernel: nvidia 0000:01:00.0: enabling device (0000 -> 0003)
13:51:10 kernel: nvidia-nvlink: Nvlink Core is being initialized, major device number 510
13:51:09 kernel: nvidia: module license taints kernel.
13:51:09 kernel: nvidia: module license taints kernel.
13:51:09 kernel: nvidia: module license 'NVIDIA' taints kernel.
13:51:09 kernel: nvidia: loading out-of-tree module taints kernel.
13:51:09 kernel: Kernel command line: BOOT_IMAGE=/vmlinuz-6.5.0-6-generic root=/dev/mapper/vgubuntu-root ro nvidia.NVreg_OpenRmEnableUnsupportedGpus=1 quiet splash vt.handoff=7
13:51:09 kernel: Command line: BOOT_IMAGE=/vmlinuz-6.5.0-6-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7

[Francois Thirioux (fthx)]

Here is lspci, Nvidia gpu is listed:

00:00.0 Host bridge: Intel Corporation 12th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:01.0 PCI bridge: Intel Corporation 12th Gen Core Processor PCI Express x16 Controller #1 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-P Integrated Graphics Controller (rev 0c)
00:04.0 Signal processing controller: Intel Corporation Alder Lake Innovation Platform Framework Processor Participant (rev 02)
00:06.0 PCI bridge: Intel Corporation 12th Gen Core Processor PCI Express x4 Controller #0 (rev 02)
00:06.2 PCI bridge: Intel Corporation 12th Gen Core Processor PCI Express x4 Controller #2 (rev 02)
00:07.0 PCI bridge: Intel Corporation Alder Lake-P Thunderbolt 4 PCI Express Root Port #0 (rev 02)
00:0a.0 Signal processing controller: Intel Corporation Platform Monitoring Technology (rev 01)
00:0d.0 USB controller: Intel Corporation Alder Lake-P Thunderbolt 4 USB Controller (rev 02)
00:0d.2 USB controller: Intel Corporation Alder Lake-P Thunderbolt 4 NHI #0 (rev 02)
00:14.0 USB controller: Intel Corporation Alder Lake PCH USB 3.2 xHCI Host Controller (rev 01)
00:14.2 RAM memory: Intel Corporation Alder Lake PCH Shared SRAM (rev 01)
00:14.3 Network controller: Intel Corporation Alder Lake-P PCH CNVi WiFi (rev 01)
00:15.0 Serial bus controller: Intel Corporation Alder Lake PCH Serial IO I2C Controller #0 (rev 01)
00:15.1 Serial bus controller: Intel Corporation Alder Lake PCH Serial IO I2C Controller #1 (rev 01)
00:16.0 Communication controller: Intel Corporation Alder Lake PCH HECI Controller (rev 01)
00:1d.0 PCI bridge: Intel Corporation Device 51b0 (rev 01)
00:1d.1 PCI bridge: Intel Corporation Alder Lake PCI Express x1 Root Port #10 (rev 01)
00:1f.0 ISA bridge: Intel Corporation Alder Lake PCH eSPI Controller (rev 01)
00:1f.3 Audio device: Intel Corporation Alder Lake PCH-P High Definition Audio Controller (rev 01)
00:1f.4 SMBus: Intel Corporation Alder Lake PCH-P SMBus Host Controller (rev 01)
00:1f.5 Serial bus controller: Intel Corporation Alder Lake-P PCH SPI Controller (rev 01)
01:00.0 VGA compatible controller: NVIDIA Corporation GA104M [Geforce RTX 3070 Ti Laptop GPU] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GA104 High Definition Audio Controller (rev a1)
05:00.0 Non-Volatile memory controller: SK hynix Gold P31/BC711/PC711 NVMe Solid State Drive
06:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller PM9A1/PM9A3/980PRO
34:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)