Comment 11 for bug 2029332

not solved

On Sat, 9 Sept 2023 at 14:26, Ubuntu Kernel Bot <email address hidden>
wrote:

> This bug is awaiting verification that the linux-
> aws-6.2/6.2.0-1013.13~22.04.1 kernel in -proposed solves the problem.
> Please test the kernel and update this bug with the results. If the
> problem is solved, change the tag 'verification-needed-jammy-linux-
> aws-6.2' to 'verification-done-jammy-linux-aws-6.2'. If the problem
> still exists, change the tag 'verification-needed-jammy-linux-aws-6.2'
> to 'verification-failed-jammy-linux-aws-6.2'.
>
> If verification is not done by 5 working days from today, this fix will
> be dropped from the source code, and this bug will be closed.
>
> See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
> to enable and use -proposed. Thank you!
>
>
> ** Tags added: kernel-spammed-jammy-linux-aws-6.2-v2
> verification-needed-jammy-linux-aws-6.2
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (2032786).
> https://bugs.launchpad.net/bugs/2029332
>
> Title:
> Reboot command powers off the system
>
> Status in linux package in Ubuntu:
> Confirmed
> Status in linux-hwe-6.2 package in Ubuntu:
> Confirmed
> Status in linux-hwe-6.2 source package in Jammy:
> Fix Released
> Status in linux source package in Lunar:
> Fix Committed
>
> Bug description:
> [Impact]
>
> Issue: When a reboot (or init 6) command is issued the server shuts
> down instead.
>
> Expected behaviour: To reboot and NOT shutdown
>
> Impacted HW: HPE DL 380 OR Synergy 480 Gen 10 Plus Server 2P core
> count greater than 16 (like 24,28 or 32)
>
> Impacted OS: Ubuntu 22.04.2 kernel higher than 15.17.15
>
> When the CPU count is 1, issue is not observed. When core count is
> less than 24 (like 16) issue not observed.
>
> [Fix]
>
> Problem introduced in v5.18 with commit:
> 08f253ec3767 x86/cpu: Clear SME feature flag when not in use
>
> Fixes for the above:0
> 9b040453d444 x86/smp: Dont access non-existing CPUID leaf
> 1f5e7eb7868e x86/smp: Make stop_other_cpus() more robust
>
> [Test Case]
>
> $ sudo reboot
> Server should reboot and not power off.
>
> [Where Problems Could Occur]
>
> The fixes modify x86 stop-CPU code so reboot/poweroff of x86 machines
> could be affected.
>
> To manage notifications about this bug go to:
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>
>