*** This bug is a duplicate of bug 2003237 ***
    https://bugs.launchpad.net/bugs/2003237

The wake-up from sleep is around 11:26. There's a lot of stuff before,
so maybe you can find something.

I've added the flag to the environment, but from what I see the
backlight remains on (it's sunny day, so hard to spot, but shading
screen seem to show lights in corners).

Hope that helps.

** Attachment added: "XZ dump of `sudo journalctl` since reboot today"
   
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2007268/+attachment/5647411/+files/bug-dump.txt.xz

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https://bugs.launchpad.net/bugs/2007268

Title:
  Backlight does not turn off during screen blanking

Status in mutter package in Ubuntu:
  Incomplete

Bug description:
  In the 2022/2023 energy crisis era, this shall not happen. But... I
  haven't found solution other than "switch to X", which is not an
  options with my scaling settings for both 4K screens I'm using.

  On idle when the system blanks screen backlight remains on, wasting
  energy and burning LEDs in my screens. Please provide solution that
  would let Gnome set DPMS properly and actually send screens to proper
  sleep when OS goes idle (enables screen saver).

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: libwayland-bin 1.20.0-1ubuntu0.1
  ProcVersionSignature: Ubuntu 5.15.0-58.64-generic 5.15.74
  Uname: Linux 5.15.0-58-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu82.3
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: pass
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Feb 14 11:59:59 2023
  DistUpgraded: Fresh install
  DistroCodename: jammy
  DistroVariant: ubuntu
  DkmsStatus:
   v4l2loopback/0.12.5, 5.15.0-58-generic, x86_64: installed
   v4l2loopback/0.12.5, 5.15.0-60-generic, x86_64: installed
  GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt [1002:1681] 
(rev d1) (prog-if 00 [VGA controller])
  InstallationDate: Installed on 2023-01-04 (40 days ago)
  InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 
(20220809.1)
  MachineType: LENOVO 21CKCTO1WW
  ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_zrhf1w@/vmlinuz-5.15.0-58-generic 
root=ZFS=rpool/ROOT/ubuntu_zrhf1w ro quiet splash
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: wayland
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/11/2022
  dmi.bios.release: 1.32
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R23ET62W (1.32 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 21CKCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: ThinkPad
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.23
  dmi.modalias: 
dmi:bvnLENOVO:bvrR23ET62W(1.32):bd11/11/2022:br1.32:efr1.23:svnLENOVO:pn21CKCTO1WW:pvrThinkPadP16sGen1:rvnLENOVO:rn21CKCTO1WW:rvrThinkPad:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21CK_BU_Think_FM_ThinkPadP16sGen1:
  dmi.product.family: ThinkPad P16s Gen 1
  dmi.product.name: 21CKCTO1WW
  dmi.product.sku: LENOVO_MT_21CK_BU_Think_FM_ThinkPad P16s Gen 1
  dmi.product.version: ThinkPad P16s Gen 1
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.5-0ubuntu0.1~22.04.1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.7
  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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