I have tried cables, drivers, upgrades --no matter what I do I cannot get Ubuntu to recognize that my 32" UHD LG display supports 2560x1440. I can work around it with `cvt` and `xrandr` but this is tedious and is not saved across sessions, and xorg.conf is no longer a possibility (bricks the system).
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: xorg 1:7.7+22ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17
Uname: Linux 5.11.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Jun 11 12:06:05 2021
DistUpgraded: 2021-06-11 10:51:25,279 DEBUG Running PostInstallScript: '/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
DistroCodename: hirsute
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation CometLake-S GT2 [UHD Graphics 630] [8086:9bc5] (rev 05) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:09a4]
InstallationDate: Installed on 2021-03-08 (95 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: Dell Inc. OptiPlex 7080
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-18-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to hirsute on 2021-06-11 (0 days ago)
dmi.bios.date: 12/24/2020
dmi.bios.release: 1.3
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.2
dmi.board.name: 0J37VM
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.3.2:bd12/24/2020:br1.3:svnDellInc.:pnOptiPlex7080:pvr:rvnDellInc.:rn0J37VM:rvrA01:cvnDellInc.:ct3:cvr:
dmi.product.family: OptiPlex
dmi.product.name: OptiPlex 7080
dmi.product.sku: 09A4
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.104-1build1
version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.1-2
version.libgl1-mesa-glx: libgl1-mesa-glx 21.0.1-2
version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200714-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1
I've decoded your monitor's EDID data (see attached) and it only supports the detailed modes 3440x1440 or 2560x1080. Not "2560x1440", although you can fake it with xrandr as you say. So if that's the only issue then this bug is invalid.
If you find 3440x1440 or 2560x1080 are missing by default however, then this is kernel bug 1901470.