The most likely explanation here is that the kernel is not offering 4K
as a supported resolution, which you can check by running:

  grep . /sys/class/drm/*/modes

If it's not listed there then you need a higher quality HDMI 2.0 cable.
Or even better to use DisplayPort instead.


** Package changed: xorg (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/2004613

Title:
  Intel UHD Graphics 770 (ADL-S GT1) max res 1920x1080, should be 4K

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This GPU should be capable of 4K resolution, but it's unavailable.

  Tried manually adding modeline with

  xrandr --newmode "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 
2168 2237 -hsync +vsync
  xrandr --addmode HDMI-3 "3840x2160_60.00"

  Still fails to set 4K resolution.

  Upgraded to signed kernel 5.19.0-28-generic #29~22.04.1-Ubuntu, added
  linux-modules-extra, ensured that system is loading i915 kernel
  module.

  inxi -G 
  Graphics:
    Device-1: Intel driver: i915 v: kernel
    Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: modesetting
      unloaded: fbdev,vesa gpu: i915 resolution: 1920x1080~60Hz
    OpenGL: renderer: Mesa Intel UHD Graphics 770 (ADL-S GT1)
      v: 4.6 Mesa 22.0.5

  lspci -k | head -10
  00:00.0 Host bridge: Intel Corporation Device 4650 (rev 05)
          Subsystem: Dell Device 0ac5
  00:02.0 VGA compatible controller: Intel Corporation Device 4690 (rev 0c)
          Subsystem: Dell Device 0ac5
          Kernel driver in use: i915
          Kernel modules: i915

  xrandr
  Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
  DP-1 disconnected (normal left inverted right x axis y axis)
  HDMI-1 disconnected (normal left inverted right x axis y axis)
  DP-2 disconnected (normal left inverted right x axis y axis)
  HDMI-2 disconnected (normal left inverted right x axis y axis)
  HDMI-3 connected primary 1920x1080+0+0 (normal left inverted right x axis y 
axis) 800mm x 450mm
     1920x1080     60.00*   59.94    30.00    24.00    29.97    23.98  
     1920x1080i    60.00    59.94  
     1680x1050     59.88  
     1280x1024     75.02    60.02  
     1440x900      59.90  
     1280x960      60.00  
     1360x768      60.02  
     1280x800      59.91  
     1152x864      75.00  
     1280x720      60.00    30.00    59.94    29.97    24.00    23.98  
     1024x768      75.03    70.07    60.00  
     800x600       72.19    75.00    60.32  
     720x480       60.00    59.94  
     720x480i      60.00    59.94  
     640x480       75.00    72.81    60.00    59.94  
     720x400       70.08  
     3840x2160_60.00  59.98  # <--- manually configured 

  xrandr --output HDMI-3 --mode 3840x2160_60.00
  xrandr: Configure crtc 0 failed

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: xorg 1:7.7+23ubuntu2
  ProcVersionSignature: Ubuntu 5.19.0-28.29~22.04.1-generic 5.19.17
  Uname: Linux 5.19.0-28-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.3
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CompositorRunning: None
  CurrentDesktop: KDE
  Date: Thu Feb  2 22:00:36 2023
  DistUpgraded: 2023-01-28 19:49:57,594 DEBUG Running PostInstallScript: 
'/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
  DistroCodename: jammy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation Device [8086:4690] (rev 0c) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:0ac5]
  InstallationDate: Installed on 2020-07-18 (929 days ago)
  InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Lsusb:
   Bus 002 Device 002: ID 0480:0110 Toshiba America Inc External USB 3.0
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0489:e0c8 Foxconn / Hon Hai Wireless_Device
   Bus 001 Device 002: ID 248a:8367 Maxxter Telink Wireless Receiver
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. OptiPlex 3000
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-28-generic 
root=/dev/mapper/vgkubuntu-root ro nosplash
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to jammy on 2023-01-29 (5 days ago)
  dmi.bios.date: 05/18/2022
  dmi.bios.release: 1.1
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.60
  dmi.board.name: 057FFP
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.1.60:bd05/18/2022:br1.1:svnDellInc.:pnOptiPlex3000:pvr:rvnDellInc.:rn057FFP:rvrA00:cvnDellInc.:ct3:cvr:sku0AC5:
  dmi.product.family: OptiPlex
  dmi.product.name: OptiPlex 3000
  dmi.product.sku: 0AC5
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.110-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.5-0ubuntu0.3
  version.libgl1-mesa-glx: libgl1-mesa-glx 22.0.5-0ubuntu0.3
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.5
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.17-2build1

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