Public bug reported:

I have Kubuntu 22.04 and KDE 5.24.7 on my desktop. On 4/19/24 it
downloaded and installed kernel 6.5.0-28-generic. After restarting, I
suddenly had 2 issues:

    1. I have 2 monitors. One of the monitors would not turn on while in the 
KDE desktop. However, while booting and also after getting into KDE and 
pressing CTRL-ALT-F2 to switch to the terminal the monitor worked, so I knew 
there wasn't a hardware problem with the monitor.
    2. I could no longer put the computer into sleep mode. When I clicked on 
"sleep", it appeared to go into sleep mode (the working monitor would turn 
off), but the CPU fan never turned off and it was still "awake".

I was able to revert back to 6.5.0-27-generic from the grub menu and the
above issues went away, but they are concerning and I can't use
6.5.0-28-generic.

Start-Date: 2024-04-19  19:39:32
Commandline: /usr/bin/unattended-upgrade
Install: linux-modules-extra-6.5.0-28-generic:amd64 (6.5.0-28.29~22.04.1, 
automatic), linux-hwe-6.5-headers-6.5.0-28:amd64 (6.5.0-28.29~22.04.1, 
automatic), linux-modules-6.5.0-28-generic:amd64 (6.5.0-28.29~22.04.1, 
automatic), linux-image-6.5.0-28-generic:amd64 (6.5.0-28.29~22.04.1, 
automatic), linux-headers-6.5.0-28-generic:amd64 (6.5.0-28.29~22.04.1, 
automatic)
Upgrade: linux-image-generic-hwe-22.04:amd64 (6.5.0.27.28~22.04.1, 
6.5.0.28.29~22.04.1), linux-headers-generic-hwe-22.04:amd64 
(6.5.0.27.28~22.04.1, 6.5.0.28.29~22.04.1), linux-generic-hwe-22.04:amd64 
(6.5.0.27.28~22.04.1, 6.5.0.28.29~22.04.1)
End-Date: 2024-04-19  19:40:36


$ lsb_release -rd
Description:    Ubuntu 22.04.4 LTS
Release:        22.04

** Affects: ubuntu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2063259

Title:
  sudden issues with monitors and sleep mode with 6.5.0-28-generic
  kernel

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