Difference between the LM22.3 installed system and the live session with regard to nouveau

[lessharm]

I just realized that the mintinstall repository is the wrong place for my post. Would it be better to put it in the linuxmint repository? Can someone move it to the right place? Thank you very much!

I use an old Sony Vaio VGN-Z21WN_B laptop with hybrid graphics Intel/Nvidia and installed LM22.3 with the kernel 6.14. The Nvidia-driver 340 was only usable until LM20, so I hope I can use the nouveau driver instead and the hdmi-port. In the LM22.3-live-session the nouveau driver is in use as can be seen in the following outputs from sysinfo and dmesg:

Graphics:
  Device-1: Intel Mobile 4 Series Integrated Graphics vendor: Sony driver: i915 v: kernel
    arch: Gen-5 ports: active: LVDS-1 empty: VGA-1 bus-ID: 00:02.0 chip-ID: 8086:2a42 class-ID: 0300
  Device-2: NVIDIA G98M [GeForce 9300M GS] vendor: Sony driver: nouveau v: kernel arch: Tesla
    pcie: speed: 2.5 GT/s lanes: 16 ports: active: LVDS-2 empty: DVI-D-1,HDMI-A-1,VGA-2
    bus-ID: 01:00.0 chip-ID: 10de:06e5 class-ID: 0300 temp: 61.0 C

2026-02-07T13:16:30.029294+01:00 mint sensors[1561]: nouveau-pci-0100
2026-02-07T13:16:30.034072+01:00 mint kernel: nouveau 0000:01:00.0: enabling device (0000 -> 0003)
2026-02-07T13:16:30.034088+01:00 mint kernel: nouveau 0000:01:00.0: NVIDIA G98 (298280a2)
2026-02-07T13:16:30.034280+01:00 mint kernel: nouveau 0000:01:00.0: bios: version 62.98.3e.00.18
2026-02-07T13:16:30.034289+01:00 mint kernel: nouveau 0000:01:00.0: fb: 256 MiB GDDR3
2026-02-07T13:16:30.034382+01:00 mint kernel: vga_switcheroo: enabled
2026-02-07T13:16:30.034385+01:00 mint kernel: nouveau 0000:01:00.0: drm: VRAM: 256 MiB
2026-02-07T13:16:30.034388+01:00 mint kernel: nouveau 0000:01:00.0: drm: GART: 1048576 MiB
2026-02-07T13:16:30.034391+01:00 mint kernel: nouveau 0000:01:00.0: drm: TMDS table version 2.0
2026-02-07T13:16:30.034393+01:00 mint kernel: nouveau 0000:01:00.0: drm: BIOS FP mode: 1600x900 (99930kHz pixel clock)
2026-02-07T13:16:30.034411+01:00 mint kernel: nouveau 0000:01:00.0: drm: MM: using M2MF for buffer copies
2026-02-07T13:16:30.034415+01:00 mint kernel: nouveau 0000:01:00.0: drm: Skipping nv_backlight registration
2026-02-07T13:16:30.034420+01:00 mint kernel: nouveau 0000:01:00.0: [drm] Registered 2 planes with drm panic
2026-02-07T13:16:30.034423+01:00 mint kernel: [drm] Initialized nouveau 1.4.0 for 0000:01:00.0 on minor 2
2026-02-07T13:16:30.034426+01:00 mint kernel: fbcon: Deferring console take-over
2026-02-07T13:16:30.034429+01:00 mint kernel: nouveau 0000:01:00.0: [drm] fb1: nouveaudrmfb frame buffer device
2026-02-07T13:18:29.345598+01:00 mint kernel: nouveau 0000:01:00.0: vulkaninfo[2612]: channel failed to initialise, -17
2026-02-07T13:20:30.881598+01:00 mint kernel: nouveau 0000:01:00.0: vulkaninfo[2713]: channel failed to initialise, -17

In the installed system the situation is as follows:

Graphics:
  Device-1: Intel Mobile 4 Series Integrated Graphics vendor: Sony driver: i915 v: kernel
    arch: Gen-5 ports: active: LVDS-1 empty: VGA-1 bus-ID: 00:02.0 chip-ID: 8086:2a42 class-ID: 0300
  Device-2: NVIDIA G98M [GeForce 9300M GS] vendor: Sony driver: N/A arch: Tesla pcie:
    speed: 2.5 GT/s lanes: 16 bus-ID: 01:00.0 chip-ID: 10de:06e5 class-ID: 0300

[   21.128049] kernel: nouveau 0000:01:00.0: enabling device (0000 -> 0003)
[   21.128165] kernel: nouveau 0000:01:00.0: NVIDIA G98 (298280a2)
[   23.020750] kernel: nouveau 0000:01:00.0: bios: unable to locate usable image
[   23.020771] kernel: nouveau 0000:01:00.0: bios ctor failed: -22
[   23.020786] kernel: nouveau 0000:01:00.0: probe with driver nouveau failed with error -22
[   23.020807] kernel: ACPI: video: Video Device [DGPU] (multi-head: yes  rom: yes  post: no)
[   23.020811] kernel: ------------[ cut here ]------------
[   23.021069] kernel:  ? __pfx_nouveau_drm_init+0x10/0x10 [nouveau]
[   23.021311] kernel:  __pci_register_driver+0x5e/0x70
[   23.021317] kernel:  nouveau_drm_init+0x76/0xff0 [nouveau]

Obviously in the live-system a usable image (vbios) can be found but not in the installed system. How is that possible and what is the difference between live and installed system in that case?