I have now taken a look at the Xorg log files and they seem to be complaining about it not finding the nvidia kernel module, even though I just installed the nvidia-driver package. This is the complete file content
/var/logs/Xorg.0.log[ 271.351] X.Org X Server 1.21.1.11 X Protocol Version 11, Revision 0 [ 271.351] Current Operating System: Linux Marty-PC 6.9.7+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.9.7-1~bpo12+1 (2024-07-03) x86_64 [ 271.351] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.9.7+bpo-amd64 root=UUID=d4a79dc4-42f3-4ca3-a115-9e7fede5ab33 ro quiet splash nvidia-drm.modeset=1 [ 271.351] xorg-server 2:21.1.12-1 (https://www.debian.org/support) [ 271.351] Current version of pixman: 0.42.2 [ 271.351] Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. [ 271.351] Markers: (–) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 271.351] (==) Log file: “/var/log/Xorg.0.log”, Time: Thu Jul 18 20:00:51 2024 [ 271.351] (==) Using config file: “/etc/X11/xorg.conf” [ 271.351] (==) Using config directory: “/etc/X11/xorg.conf.d” [ 271.351] (==) Using system config directory “/usr/share/X11/xorg.conf.d” [ 271.352] (==) ServerLayout “Layout0” [ 271.352] (**) |–>Screen “Screen0” (0) [ 271.352] (**) | |–>Monitor “Monitor0” [ 271.352] (**) | |–>Device “Device0” [ 271.352] (**) | |–>GPUDevice “Device0” [ 271.352] (**) |–>Input Device “Keyboard0” [ 271.352] (**) |–>Input Device “Mouse0” [ 271.352] (**) Option “Xinerama” “0” [ 271.352] (**) Allowing byte-swapped clients [ 271.352] (==) Automatically adding devices [ 271.352] (==) Automatically enabling devices [ 271.352] (==) Automatically adding GPU devices [ 271.352] (==) Automatically binding GPU devices [ 271.352] (==) Max clients allowed: 256, resource mask: 0x1fffff [ 271.352] (WW) The directory “/usr/share/fonts/X11/cyrillic” does not exist. [ 271.352] Entry deleted from font path. [ 271.352] (==) FontPath set to: /usr/share/fonts/X11/misc, /usr/share/fonts/X11/100dpi/:unscaled, /usr/share/fonts/X11/75dpi/:unscaled, /usr/share/fonts/X11/Type1, /usr/share/fonts/X11/100dpi, /usr/share/fonts/X11/75dpi, built-ins [ 271.352] (==) ModulePath set to “/usr/lib/xorg/modules” [ 271.352] (WW) Hotplugging is on, devices using drivers ‘kbd’, ‘mouse’ or ‘vmmouse’ will be disabled. [ 271.352] (WW) Disabling Keyboard0 [ 271.352] (WW) Disabling Mouse0 [ 271.352] (II) Loader magic: 0x559f2898ff00 [ 271.352] (II) Module ABI versions: [ 271.352] X.Org ANSI C Emulation: 0.4 [ 271.352] X.Org Video Driver: 25.2 [ 271.352] X.Org XInput driver : 24.4 [ 271.352] X.Org Server Extension : 10.0 [ 271.353] (++) using VT number 2 [ 271.355] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_32 [ 271.357] (–) PCI:*(1@0:0:0) 10de:1b83:10de:1b83 rev 161, Mem @ 0xd2000000/16777216, 0xc0000000/268435456, 0xd0000000/33554432, I/O @ 0x00003000/128, BIOS @ 0x???/131072 [ 271.357] (II) LoadModule: “glx” [ 271.357] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so [ 271.357] (II) Module glx: vendor=“X.Org Foundation” [ 271.357] compiled for 1.21.1.11, module version = 1.0.0 [ 271.357] ABI class: X.Org Server Extension, version 10.0 [ 271.357] (II) LoadModule: “nvidia” [ 271.358] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so [ 271.358] (II) Module nvidia: vendor=“NVIDIA Corporation” [ 271.358] compiled for 1.6.99.901, module version = 1.0.0 [ 271.358] Module class: X.Org Video Driver [ 271.358] (II) NVIDIA dlloader X Driver 535.183.01 Sun May 12 19:35:37 UTC 2024 [ 271.358] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs [ 271.358] (II) Loading sub module “fb” [ 271.358] (II) LoadModule: “fb” [ 271.358] (II) Module “fb” already built-in [ 271.358] (II) Loading sub module “wfb” [ 271.358] (II) LoadModule: “wfb” [ 271.358] (II) Loading /usr/lib/xorg/modules/libwfb.so [ 271.358] (II) Module wfb: vendor=“X.Org Foundation” [ 271.358] compiled for 1.21.1.11, module version = 1.0.0 [ 271.358] ABI class: X.Org ANSI C Emulation, version 0.4 [ 271.363] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the [ 271.363] (EE) NVIDIA: system’s kernel log for additional error messages and [ 271.363] (EE) NVIDIA: consult the NVIDIA README for details. [ 271.368] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the [ 271.368] (EE) NVIDIA: system’s kernel log for additional error messages and [ 271.368] (EE) NVIDIA: consult the NVIDIA README for details. [ 271.368] (EE) No devices detected. [ 271.369] (EE) Fatal server error: [ 271.369] (EE) no screens found(EE) [ 271.369] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 271.369] (EE) Please also check the log file at “/var/log/Xorg.0.log” for additional information. [ 271.369] (EE) [ 271.371] (EE) Server terminated with error (1). Closing log file.