No, doing a ZFS install is not necessary to reproduce this bug.

** Description changed:

  A fresh installation of the Focal daily image dated 20220831 fails to
  start the graphical environment when using the nouveau drivers and I'm
  only able to log in on the console. The system under test is using QEMU
  w/ GPU passthrough and an NVIDIA GeForce GTX 650 device.
  
  The same issue happened with the 20.04.4 installation media however in
- that case I tried to install the NVIDIA drivers but it did not work.
+ that case I tried to install the NVIDIA drivers but installing the
+ drivers did not work.
  
- ProblemType: Bug
- DistroRelease: Ubuntu 20.04
+ ProblemType: BugDistroRelease: Ubuntu 20.04
  Package: xserver-xorg-video-nouveau 1:1.0.16-1
  ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
  Uname: Linux 5.15.0-46-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  Date: Wed Aug 31 09:58:56 2022
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
-  Red Hat, Inc. QXL paravirtual graphic card [1b36:0100] (rev 05) (prog-if 00 
[VGA controller])
-    Subsystem: Red Hat, Inc. QEMU Virtual Machine [1af4:1100]
-  NVIDIA Corporation GK107 [GeForce GTX 650] [10de:0fc6] (rev a1) (prog-if 00 
[VGA controller])
-    Subsystem: eVga.com. Corp. GK107 [GeForce GTX 650] [3842:2652]
+  Red Hat, Inc. QXL paravirtual graphic card [1b36:0100] (rev 05) (prog-if 00 
[VGA controller])
+    Subsystem: Red Hat, Inc. QEMU Virtual Machine [1af4:1100]
+  NVIDIA Corporation GK107 [GeForce GTX 650] [10de:0fc6] (rev a1) (prog-if 00 
[VGA controller])
+    Subsystem: eVga.com. Corp. GK107 [GeForce GTX 650] [3842:2652]
  InstallationDate: Installed on 2022-08-31 (0 days ago)
  InstallationMedia: Ubuntu 20.04.5 LTS "Focal Fossa" - Release amd64 (20220831)
  Lsusb:
-  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
-  Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
-  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+  Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
+  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Lsusb-t:
-  /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 5000M
-  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
-      |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 
480M
+  /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 5000M
+  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
+      |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 
480M
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  ProcEnviron:
-  TERM=linux
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
- ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_a6ic10@/vmlinuz-5.15.0-46-generic 
root=ZFS=rpool/ROOT/ubuntu_a6ic10 ro quiet splash vt.handoff=1
- SourcePackage: xserver-xorg-video-nouveau
+  TERM=linux
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_a6ic10@/vmlinuz-5.15.0-46-generic 
root=ZFS=rpool/ROOT/ubuntu_a6ic10 ro quiet splash vt.handoff=1SourcePackage: 
xserver-xorg-video-nouveau
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/06/2015
  dmi.bios.release: 0.0
  dmi.bios.vendor: EFI Development Kit II / OVMF
  dmi.bios.version: 0.0.0
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-6.2
  dmi.modalias: 
dmi:bvnEFIDevelopmentKitII/OVMF:bvr0.0.0:bd02/06/2015:br0.0:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-6.2:cvnQEMU:ct1:cvrpc-q35-6.2:sku:
  dmi.product.name: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-6.2
  dmi.sys.vendor: QEMU
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.107-8ubuntu1~20.04.2
  version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.6-0ubuntu0.1~20.04.2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-nouveau in Ubuntu.
https://bugs.launchpad.net/bugs/1988332

Title:
  Desktop environment fails to start

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https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1988332/+subscriptions


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