I have two Lenovo P50 ThinkPad machines, only one of which had this issue (even after making the BIOS and Kernel on both exactly the same).
But I've managed to solve it on the machine that wasn't working correctly by going through all of my BIOS settings and making the non working machine match the working machine. I'm not sure exactly what did it, but here are the things I changed to match working machine 1. power on with ac attach to disabled 2. virtualization to disabled disabled 3. Intel (R) SGX Control - current state to disabled working machine had software controlled disabled but I couldn't seem to select that. Non working machine had software controlled enabled but I changed it to disabled 4. UEFI/ Legacy boot changed from UEFI Only to Both 5. Network Boot changed from USB HDD to PCI LAN 6. Intel (R) AMT Control changed to disabled So, changing one (or a combination) of those settings fixed this issue for me! Just to add: in addition to not powering down correctly, my not working machine previously also wouldn't wake from suspend. That issue has also been resolved by making the above changes! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2059738 Title: Kernel 6.8 - Shutdown/Reboot hangs on Noble 24.04 Status in snapd: Confirmed Status in linux package in Ubuntu: Confirmed Status in snapd package in Ubuntu: Confirmed 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 To manage notifications about this bug go to: https://bugs.launchpad.net/snapd/+bug/2059738/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
