Ubuntu 24.04 - GNOME on Xorg session crashes on launch

[Patrick Doyle]

I just upgraded an existing 23.10 installation to 24.04 LTS development branch/beta.
Whereas GNOME on Xorg worked fine on 23.10, upon completed upgrade/reboot my system defaulted to GNOME on Wayland*.
Attempting to login under Xorg caused the system to freeze and subsequently prompted me to login again. I cannot launch GNOME on 24.04 using Xorg, only Wayland.
Upon deleting "20-nvidia.conf", located at "/etc/X11/xorg.conf.d/", attempting to launch an Xorg/X11 session greeted me with a black screen, and I was subsequently returned to login a few seconds later.

(*The Wayland session, while functional, contained a lot of tearing, stuttering, and a lack of animations.)

Ubuntu 24.04 LTS Dev.
DE: GNOME
Graphics driver: Nvidia 535

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
Uname: Linux 6.8.0-22-generic x86_64
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 13 14:58:57 2024
DistUpgraded: 2024-04-13 14:14:00,343 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation TU104 [GeForce RTX 2070 SUPER] [10de:1ec7] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: NVIDIA Corporation TU104 [GeForce RTX 2070 SUPER] [10de:13aa]
InstallationDate: Installed on 2023-12-15 (121 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
MachineType: Micro-Star International Co., Ltd. MS-7B17
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-22-generic root=UUID=d1172f3e-66ff-4508-a818-d3f88ec03bdb ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: Upgraded to noble on 2024-04-13 (0 days ago)
dmi.bios.date: 03/26/2019
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A.50
dmi.board.asset.tag: Default string
dmi.board.name: MPG Z390 GAMING EDGE AC (MS-7B17)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 2.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA.50:bd03/26/2019:br5.13:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B17:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnMPGZ390GAMINGEDGEAC(MS-7B17):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:skuDefaultstring:
dmi.product.family: Default string
dmi.product.name: MS-7B17
dmi.product.sku: Default string
dmi.product.version: 2.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.3-1ubuntu4
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.11-2ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rich McAllister (rfm)]

I'm having the same xorg crash problem on Xubuntu 24.04 beta, see #2061246 (dup'ed to here.) I can reproduce the problem with a Ubuntu 24.04 beta install, but there xorg always crashes, unlike the Xubuntu/xfce4 flavor where the first login after booting fails but trying again immediately will succeed.

There's some crash info left in Xorg.0.log, I'll attach it.

[Daniel van Vugt (vanvugt)]

Patrick and Rich; both of your logs look like bug 1858336 which redirects to bug 1861609 but I'm not sure that's right for everyone...

Also Patrick; yours looks like it is caused by a broken/missing Nvidia driver so please use the 'Additional Drivers' app to install a fresh one.