I've extended the test plan to mention the particular hardware required. As for testing multiple Nvidia driver versions, that's not required. Because the phantom monitor comes from simpledrm and not from nvidia. There are no separate per-driver fixes. Although it's always advisable you're starting with a machine that has the bug before verifying the fix.
** Description changed: [ Impact ] After installing Nvidia driver 545 on a single (27") monitor system, Settings shows a phantom 46" monitor of the same resolution. It looks like the phantom monitor is /dev/dri/card0 which is still controlled by simpledrm, while Nvidia uses /dev/dri/card1. This also seems to be triggering bug 2062426 and bug 2066126. [ Temporary Workaround ] 1. sudo rm /dev/dri/card0 2. Log in again. [ Permanent Workaround ] Add kernel parameter: initcall_blacklist=simpledrm_platform_driver_init [ Test Plan ] - Open Settings and verify the only monitors shown are your real monitors. + 1. Set up a single monitor desktop where the only GPU enabled is an Nvidia one. + 2. Open the 'Additional Drivers' app to install a supported Nvidia driver. + 3. Reboot and verify the Nvidia driver is now active (lspci -k should mention 'nvidia' and not 'nouveau'). + 4. Open Settings and verify the only monitors shown are your real monitors. [ Where problems could occur ] Removing the simpledrm card is only safe when it's not being used. If somehow a machine wasn't using the installed Nvidia driver then there could be a risk of deleting the only working display. [ Other Info ] ProblemType: Bug ApportVersion: 2.28.0-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: dan 4631 F.... pipewire /dev/snd/controlC1: dan 4636 F.... wireplumber CRDA: N/A CasperMD5CheckResult: pass DistroRelease: Ubuntu 24.04 InstallationDate: Installed on 2024-01-04 (92 days ago) InstallationMedia: Ubuntu 24.04 "Noble Numbat" - Daily amd64 (20231127) MachineType: Intel(R) Client Systems NUC12DCMi7 NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 simpledrmdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-11-generic root=UUID=8434774e-88f2-4e3f-adb8-2eb07dff3cf9 ro quiet loglevel=3 splash vt.handoff=7 ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4 RelatedPackageVersions: linux-restricted-modules-6.8.0-11-generic N/A linux-backports-modules-6.8.0-11-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu1 Tags: noble Uname: Linux 6.8.0-11-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sudo users _MarkForUpload: True dmi.bios.date: 12/20/2021 dmi.bios.release: 5.24 dmi.bios.vendor: Intel Corp. dmi.bios.version: EDADL579.0046.2021.1220.2351 dmi.board.name: NUC12EDBi7 dmi.board.vendor: Intel Corporation dmi.board.version: M27908-302 dmi.chassis.type: 35 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 2.0 dmi.ec.firmware.release: 3.7 dmi.modalias: dmi:bvnIntelCorp.:bvrEDADL579.0046.2021.1220.2351:bd12/20/2021:br5.24:efr3.7:svnIntel(R)ClientSystems:pnNUC12DCMi7:pvrM30143-302:rvnIntelCorporation:rnNUC12EDBi7:rvrM27908-302:cvnIntelCorporation:ct35:cvr2.0:skuRNUC12DCMi70000: dmi.product.family: DC dmi.product.name: NUC12DCMi7 dmi.product.sku: RNUC12DCMi70000 dmi.product.version: M30143-302 dmi.sys.vendor: Intel(R) Client Systems -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ubuntu-drivers-common in Ubuntu. https://bugs.launchpad.net/bugs/2060268 Title: Phantom "Unknown Display" shown in Settings after installing the Nvidia driver Status in OEM Priority Project: New Status in linux package in Ubuntu: Invalid Status in nvidia-graphics-drivers-470 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-535 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-545 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-550 package in Ubuntu: Won't Fix Status in ubuntu-drivers-common package in Ubuntu: Fix Released Status in ubuntu-drivers-common source package in Jammy: In Progress Status in ubuntu-drivers-common source package in Noble: In Progress Bug description: [ Impact ] After installing Nvidia driver 545 on a single (27") monitor system, Settings shows a phantom 46" monitor of the same resolution. It looks like the phantom monitor is /dev/dri/card0 which is still controlled by simpledrm, while Nvidia uses /dev/dri/card1. This also seems to be triggering bug 2062426 and bug 2066126. [ Temporary Workaround ] 1. sudo rm /dev/dri/card0 2. Log in again. [ Permanent Workaround ] Add kernel parameter: initcall_blacklist=simpledrm_platform_driver_init [ Test Plan ] 1. Set up a single monitor desktop where the only GPU enabled is an Nvidia one. 2. Open the 'Additional Drivers' app to install a supported Nvidia driver. 3. Reboot and verify the Nvidia driver is now active (lspci -k should mention 'nvidia' and not 'nouveau'). 4. Open Settings and verify the only monitors shown are your real monitors. [ Where problems could occur ] Removing the simpledrm card is only safe when it's not being used. If somehow a machine wasn't using the installed Nvidia driver then there could be a risk of deleting the only working display. [ Other Info ] ProblemType: Bug ApportVersion: 2.28.0-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: dan 4631 F.... pipewire /dev/snd/controlC1: dan 4636 F.... wireplumber CRDA: N/A CasperMD5CheckResult: pass DistroRelease: Ubuntu 24.04 InstallationDate: Installed on 2024-01-04 (92 days ago) InstallationMedia: Ubuntu 24.04 "Noble Numbat" - Daily amd64 (20231127) MachineType: Intel(R) Client Systems NUC12DCMi7 NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 simpledrmdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-11-generic root=UUID=8434774e-88f2-4e3f-adb8-2eb07dff3cf9 ro quiet loglevel=3 splash vt.handoff=7 ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4 RelatedPackageVersions: linux-restricted-modules-6.8.0-11-generic N/A linux-backports-modules-6.8.0-11-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu1 Tags: noble Uname: Linux 6.8.0-11-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sudo users _MarkForUpload: True dmi.bios.date: 12/20/2021 dmi.bios.release: 5.24 dmi.bios.vendor: Intel Corp. dmi.bios.version: EDADL579.0046.2021.1220.2351 dmi.board.name: NUC12EDBi7 dmi.board.vendor: Intel Corporation dmi.board.version: M27908-302 dmi.chassis.type: 35 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 2.0 dmi.ec.firmware.release: 3.7 dmi.modalias: dmi:bvnIntelCorp.:bvrEDADL579.0046.2021.1220.2351:bd12/20/2021:br5.24:efr3.7:svnIntel(R)ClientSystems:pnNUC12DCMi7:pvrM30143-302:rvnIntelCorporation:rnNUC12EDBi7:rvrM27908-302:cvnIntelCorporation:ct35:cvr2.0:skuRNUC12DCMi70000: dmi.product.family: DC dmi.product.name: NUC12DCMi7 dmi.product.sku: RNUC12DCMi70000 dmi.product.version: M30143-302 dmi.sys.vendor: Intel(R) Client Systems To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/2060268/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
