@ChrisGuiver(guiverc) Before raising this bug report, I hard raised my issue in AskUbuntu (https://askubuntu.com/q/1542959/541417). I was advised to raise a bug report from there. My apologies for filing this bug against release- upgrade. To be honest, despite the simplicity of the `ubuntu-bug` GUI, the difficulty I faced was really not knowing which category to file the bug report under.
@DanielLetzeisen Thanks for informing about the latest firmware for my motherboard. I have update it. However that firmware update did not resolve my issue. Instead, I managed to resolve my issue by replacing the "noapic acpi=force" in /etc/default/grub with "intel_iommu=on iommu=pt", followed by sudo update-grub; sudo reboot. So, the number of virtual CPU cores are correctly shown on System Monitor. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta-hwe-6.11 in Ubuntu. https://bugs.launchpad.net/bugs/2100999 Title: linux-generic-hwe-24.04 version 6.11.0-19.19~24.04.1 fail to properly detect CPU core and thread count with 'noapic' Status in linux-meta-hwe-6.11 package in Ubuntu: Triaged Bug description: After doing `sudo apt upgrade`, the above mentioned linux hwe kernel was installed. Start-Date: 2025-03-05 15:02:08 Commandline: apt upgrade Requested-By: user (1000) Install: linux-objects-nvidia-470-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-hwe-6.11-tools-6.11.0-19:amd64 (6.11.0-19.19~24.04.1, automatic), linux-modules-extra-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-modules-nvidia-470-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-image-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-tools-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-signatures-nvidia-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-hwe-6.11-headers-6.11.0-19:amd64 (6.11.0-19.19~24.04.1, automatic), linux-headers-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic), linux-modules-6.11.0-19-generic:amd64 (6.11.0-19.19~24.04.1, automatic) Upgrade: linux-headers-generic-hwe-24.04:amd64 (6.8.0-52.53, 6.11.0-19.19~24.04.1), linux-generic-hwe-24.04:amd64 (6.8.0-52.53, 6.11.0-19.19~24.04.1), linux-tools-common:amd64 (6.8.0-54.56, 6.8.0-55.57), google-chrome-stable:amd64 (133.0.6943.141-1, 134.0.6998.35-1), linux-modules-nvidia-470-generic-hwe-24.04:amd64 (6.8.0-52.53, 6.11.0-19.19~24.04.1), linux-image-generic-hwe-24.04:amd64 (6.8.0-52.53, 6.11.0-19.19~24.04.1), linux-libc-dev:amd64 (6.8.0-54.56, 6.8.0-55.57) End-Date: 2025-03-05 15:03:19 After rebooting, the new linux kernel fails to correctly detect the CPU core and thread count. This system CPU has 16 cores, 32 threads and System Monitor normally shows 32 CPU virtual cores. After the upgrade, System Monitor now shows only 1 CPU virtual core. The upgrade corrupted my system. To circumvent this issue, I have to boot Ubuntu 24.04 using the linux-image-6.8.0-52-generic 6.8.0-52.53 kernel and not use the hwe kernel. I have submitted the relevant `ubuntu-bug` report. How do I fix this issue? ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: ubuntu-release-upgrader-core 1:24.04.22 [origin: unknown] ProcVersionSignature: Ubuntu 6.11.0-19.19~24.04.1-generic 6.11.11 Uname: Linux 6.11.0-19-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 CasperMD5CheckResult: pass CrashDB: ubuntu CrashReports: 640:1000:109:51661892:2025-03-03 02:30:21.363597393 +0800:2025-03-04 00:28:42.503056252 +0800:/var/crash/_opt_brave.com_brave_brave.1000.crash CurrentDesktop: ubuntu:GNOME Date: Thu Mar 6 12:16:18 2025 InstallationDate: Installed on 2024-12-07 (89 days ago) InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827.1) PackageArchitecture: all ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash XDG_RUNTIME_DIR=<set> SourcePackage: ubuntu-release-upgrader Symptom: release-upgrade UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-hwe-6.11/+bug/2100999/+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
