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[Richard Pratt <2059738@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

[Overview]
I have been testing installations of a number of Lubuntu and Xubuntu Noble Numbat 24.04 Daily builds since Feb 2024 on a DELL Wyse 3040 (UEFI bios), more latterly focused on Lubuntu.

It would appear that since introduction of Kernel 6.8 into the daily
builds, the installed system fails to carry out a successful reboot or
power off  when commanded from the desktop or the command line

[Symptoms]
When selecting either Leave-->Shutdown or Leave-->Reboot from the control panel, the process starts shutting down processes in an orderly fashion, until it gets to the part where it needs to power off hardware, where it hangs.

shutdown -H now also fails in the same manner
shutdown -r now also fails in the same manner

With quiet bootflag disabled, the last system message on display before the hang is
"Starting reboot..." or "Starting power-off..."

[Workaround]
The power button must be pressed for 5 secs to power down the hardware

[Possibly related bugs]
#1594023 Poweroff or reboot hangs. Laptop won't shutdown. 16.04
#2036987 Laptop Does Not Power Off After Installing Daily Build Of 23.10

[Unsuccessful Workarounds]
Tried boot flags acpi=force acpi=nocrq reboot=pci suggested in #1594023 - No effect

[Observations]
I do believe that shutdown/reboot was working correctly on a live USB Lubuntu Noble Numbat Alpha build on the same hardware downloaded 22-Feb-2024.  This release had an earlier kernel than 6.8. Sadly i no longer have the .iso to confirm this.  

All Lubuntu Noble daily builds since kernel 6.8 was introduced appear to
exhibit the symptoms as above

[System info]
Operating System: Ubuntu Noble Numbat (development branch)
          Kernel: Linux 6.8.0-11-generic
    Architecture: x86-64
 Hardware Vendor: Dell Inc.
  Hardware Model: Wyse 3040 Thin Client
Firmware Version: 1.2.5
   Firmware Date: Mon 2018-08-20

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 24.04 6.8 hang kernel lubuntu noble numbat reboot shutdown xubuntu

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Package changed: calamares (Ubuntu) => linux-meta (Ubuntu)

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https://bugs.launchpad.net/bugs/2059738

Title:
  Kernel 6.8 - Shutdown/Reboot hangs on Lubuntu Noble 24.04

Status in linux package in Ubuntu:
  New
Status in linux-meta package in Ubuntu:
  New

Bug description:
  [Overview]
  I have been testing installations of a number of Lubuntu and Xubuntu Noble Numbat 24.04 Daily builds since Feb 2024 on a DELL Wyse 3040 (UEFI bios), more latterly focused on Lubuntu.

  It would appear that since introduction of Kernel 6.8 into the daily
  builds, the installed system fails to carry out a successful reboot or
  power off  when commanded from the desktop or the command line

  [Symptoms]
  When selecting either Leave-->Shutdown or Leave-->Reboot from the control panel, the process starts shutting down processes in an orderly fashion, until it gets to the part where it needs to power off hardware, where it hangs.

  shutdown -H now also fails in the same manner
  shutdown -r now also fails in the same manner

  With quiet bootflag disabled, the last system message on display before the hang is
  "Starting reboot..." or "Starting power-off..."

  [Workaround]
  The power button must be pressed for 5 secs to power down the hardware

  [Possibly related bugs]
  #1594023 Poweroff or reboot hangs. Laptop won't shutdown. 16.04
  #2036987 Laptop Does Not Power Off After Installing Daily Build Of 23.10

  [Unsuccessful Workarounds]
  Tried boot flags acpi=force acpi=nocrq reboot=pci suggested in #1594023 - No effect

  [Observations]
  I do believe that shutdown/reboot was working correctly on a live USB Lubuntu Noble Numbat Alpha build on the same hardware downloaded 22-Feb-2024.  This release had an earlier kernel than 6.8. Sadly i no longer have the .iso to confirm this.  

  All Lubuntu Noble daily builds since kernel 6.8 was introduced appear
  to exhibit the symptoms as above

  [System info]
  Operating System: Ubuntu Noble Numbat (development branch)
            Kernel: Linux 6.8.0-11-generic
      Architecture: x86-64
   Hardware Vendor: Dell Inc.
    Hardware Model: Wyse 3040 Thin Client
  Firmware Version: 1.2.5
     Firmware Date: Mon 2018-08-20

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