Judging by the top of the config file it sounds like the Nvidia driver writing and overwriting it. There was an update to nvidia-graphics- drivers-460 on 21 July.
In theory this is what /usr/share/X11/xorg.conf.d/ is for, to add custom configs that other packages won't touch. But I don't know if spreading the nvidia config across multiple files with potentially duplicate sections would work. ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-460 (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-460 in Ubuntu. https://bugs.launchpad.net/bugs/1938195 Title: Configuration for eGPU removed on update Status in nvidia-graphics-drivers-460 package in Ubuntu: New Bug description: ThinkPad X1C9 running Kubuntu. I'm using an external nVidia GPU in an enclosure, attached via thunderbolt. I have applied updates over the last few weeks, and rebooted today. Got a black screen. Turns out an update back in mid June (22nd) removed the Option "AllowExternalGpus" "true" from my xorg.conf. Why is an update removing a vital configuration option enabling me to display my login screen? I had to re-edit the xorg.conf like an cave man from 20 years ago. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: xorg 1:7.7+22ubuntu1 ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia .proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file. .proc.driver.nvidia.capabilities.mig: Error: path was not a regular file. .proc.driver.nvidia.gpus.0000.52.00.0: Error: path was not a regular file. .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.suspend: suspend hibernate resume .proc.driver.nvidia.suspend_depth: default modeset uvm .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 460.91.03 Fri Jul 2 06:04:10 UTC 2021 GCC version: ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: KDE Date: Tue Jul 27 16:42:11 2021 DistUpgraded: Fresh install DistroCodename: hirsute DistroVariant: ubuntu DkmsStatus: tp_smapi, 0.43, 5.11.0-22-generic, x86_64: installed tp_smapi, 0.43, 5.11.0-25-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation TigerLake GT2 [Iris Xe Graphics] [8086:9a49] (rev 01) (prog-if 00 [VGA controller]) Subsystem: Lenovo Iris Xe Graphics [17aa:22d5] NVIDIA Corporation GP107 [GeForce GTX 1050 Ti] [10de:1c82] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. GP107 [GeForce GTX 1050 Ti] [1043:85d1] InstallationDate: Installed on 2021-05-14 (73 days ago) InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) MachineType: LENOVO 20XWCTO1WW ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=f73d534c-9211-43d9-a8d5-fe9b6bffffb3 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/26/2021 dmi.bios.release: 1.23 dmi.bios.vendor: LENOVO dmi.bios.version: N32ET47W (1.23 ) dmi.board.asset.tag: Not Available dmi.board.name: 20XWCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.22 dmi.modalias: dmi:bvnLENOVO:bvrN32ET47W(1.23):bd03/26/2021:br1.23:efr1.22:svnLENOVO:pn20XWCTO1WW:pvrThinkPadX1CarbonGen9:rvnLENOVO:rn20XWCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon Gen 9 dmi.product.name: 20XWCTO1WW dmi.product.sku: LENOVO_MT_20XW_BU_Think_FM_ThinkPad X1 Carbon Gen 9 dmi.product.version: ThinkPad X1 Carbon Gen 9 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.105-3~21.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.1-2 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-460/+bug/1938195/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
