vs220

sooNei9E
ls /usr/lib/modprobe.d
nvidia.conf nvidia-dkms.conf nvidia-utils.conf

Вот эти конфиги и смотрите - какой то из них содержит запрет на загрузку nouveau
например nvidia-utils.conf из пакета nvidia-utils

cat /usr/lib/modprobe.d/nvidia-utils.conf
blacklist nouveau

vs220
ls /usr/lib/modprobe.d

vs220

sooNei9E
почему то модуль сам не стартует в процессе загрузки системы

Пакет nvidia содержит блеклист на nouveau, если хотите использовать свободный драйвер удалите проприетарные драйвера или блеклист модуля

pacman -Qs nvidia
sudo pacman -Rds nvidia_установленные

https://wiki.archlinux.org/title/Nouveau#Keep_NVIDIA_driver_installed

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 378.13  (buildmeister@swio-display-x86-rhel47-05)  Tue Feb  7 19:37:00 PST 2017

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "intel" 0 0
    Screen      1  "Screen0" 3000 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 100.0
    VertRefresh     43.0 - 100.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nouveau"
    VendorName     "NVIDIA Corporation"
#   VendorName     "radeon"
    Option         "MetaModes"   "1920x1080, 1920x1080"
    Option         "NoLogo" "true"
    Option         "UseEdidDpi" "false"
    Option         "DPI" "96 x 96"
    Option         "Stereo" "0"
    Option         "metamodes" "nvidia-auto-select +0+0 { ForceFullCompositionPipeline = On }"
    Option         "AllowIndirectGLXProtocol" "off"
    Option         "TripleBuffer" "on"
EndSection

Section "Device"
    Identifier     "intel"
    Driver         "intel"
    Option         "MetaModes"   "1280x1024, 1280x1024"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "intel"
    Device         "intel"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "MetaModes" "1280x1024, 1280x1024"
    SubSection     "Display"
        Depth       24
        Modes      "nvidia-auto-select"
    EndSubSection
EndSection