[Bug 2065250] Re: My external Diplay Flickers

Same setup as #2
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2065250/comments/2

The failing monitor is 1080p old NEC MustySync EA231EMi
The main monitor is 4K, it has no issues

Lowering resolutions to 1600x900 on failing monitor or 1080p on 4k monitor solves the issue
Lowering refresh to 50 hz on the failing monitor also solves the issue

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https://bugs.launchpad.net/bugs/2065250

Title:
My external Diplay Flickers

Status in linux package in Ubuntu:
Incomplete

Bug description:
I connected a Samsung external monitor to my laptop which runs on
Ubuntu 24.04 with intel Iris graphics, the external monitor flickers
continuously.

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
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu May 9 10:48:41 2024
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] [8086:46a8] (rev 0c) (prog-if 00 [VGA controller])
Subsystem: Lenovo Alder Lake-UP3 GT2 [Iris Xe Graphics] [17aa:50a6]
InstallationDate: Installed on 2024-05-06 (3 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
MachineType: LENOVO 21B4S2L718
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-6.8.0-31-generic root=UUID=a74f0381-c0e0-4163-ae5a-6aa2f5cfa36b ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/23/2024
dmi.bios.release: 1.23
dmi.bios.vendor: LENOVO
dmi.bios.version: R1UET46W (1.23 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21B4S2L718
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76530 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.14
dmi.modalias: dmi:bvnLENOVO:bvrR1UET46W(1.23):bd02/23/2024:br1.23:efr1.14:svnLENOVO:pn21B4S2L718:pvrThinkPadL13Gen3:rvnLENOVO:rn21B4S2L718:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21B4_BU_Think_FM_ThinkPadL13Gen3:
dmi.product.family: ThinkPad L13 Gen 3
dmi.product.name: 21B4S2L718
dmi.product.sku: LENOVO_MT_21B4_BU_Think_FM_ThinkPad L13 Gen 3
dmi.product.version: ThinkPad L13 Gen 3
dmi.sys.vendor: LENOVO
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.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

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