Public bug reported:

I recently switched to 24.04 from 22.04, and now I'm having issues with
dual monitors that worked perfectly before. This seems to only happen
when the monitors has been off(if I log out and the screen goes
black/stops receiving a signal, or if I put the computer to sleep).

Sometimes it does work if I turn the problematic monitor off while the
screen is not receiving a signal, wake up the computer, and then turn
the monitor on. But other times it does not work and causes a crash
where I only get a button with the option to log out. That screen is
usually messed up too with parts of what was on the desktop before the
crash showing over the message.

I tried switching to the 550 nvidia driver, but that made no difference.

It's the DELL U2414H monitor that keeps getting no signal, then a
signal, then no signal for what seems to be every ~6 seconds, but no
image is ever shown. The other monitor(ASUS VG27A) is working.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
NonfreeKernelModules: 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.0000.0b.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  535.171.04  Tue Mar 19 
20:30:00 UTC 2024
 GCC version:
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Ikke tilgang: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed May  8 02:17:57 2024
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GA102 [GeForce RTX 3080] [10de:2206] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] GA102 [GeForce RTX 3080] 
[1462:3897]
InstallationDate: Installed on 2024-05-01 (6 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
MachineType: ASUS System Product Name
ProcEnviron:
 LANG=nb_NO.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-31-generic 
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/30/2021
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3801
dmi.board.asset.tag: Default string
dmi.board.name: ROG CROSSHAIR VIII HERO (WI-FI)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr3801:bd07/30/2021:br5.17:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGCROSSHAIRVIIIHERO(WI-FI):rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: ASUS
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.5-1ubuntu1
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 2:21.1.12-1ubuntu1
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

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble ubuntu

** Attachment added: "Syslog of when the computer exists sleep"
   
https://bugs.launchpad.net/bugs/2065122/+attachment/5776126/+files/syslog-sleep.txt

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https://bugs.launchpad.net/bugs/2065122

Title:
  Dual monitor setup not working after sleep/logout

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