Testing with jammy-server image (which uses 5.15 kernel) it crashes fine.
The general steps are: 1) boot VM with server image 2) apt install kdump-tools (enable kexec, enable kdump) 3) reboot, check crashdump param is set 4) kdump-config show (says ok to dump) 5) echo c | sudo tee /proc/sysrq-trigger For Focal, upgrade to linux-image-generic-hwe-20.04 kernel and repeat steps 4 and 5. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. https://bugs.launchpad.net/bugs/2000257 Title: kdump fails on focal + linux-image-generic-hwe-20.04 kernel Status in linux-meta-hwe-5.15 package in Ubuntu: New Status in makedumpfile package in Ubuntu: New Bug description: 1) $ lsb_release -rd Description: Ubuntu 20.04.5 LTS Release: 20.04 2) ubuntu@ubuntu:~$ apt-cache policy makedumpfile makedumpfile: Installed: 1:1.6.7-1ubuntu2.4 Candidate: 1:1.6.7-1ubuntu2.4 Version table: *** 1:1.6.7-1ubuntu2.4 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 1:1.6.7-1ubuntu2 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages ubuntu@ubuntu:~$ apt-cache policy kexec-tools kexec-tools: Installed: 1:2.0.18-1ubuntu1 Candidate: 1:2.0.18-1ubuntu1 Version table: *** 1:2.0.18-1ubuntu1 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status $ apt-cache policy linux-image-generic-hwe-20.04 linux-image-generic-hwe-20.04: Installed: 5.15.0.56.62~20.04.22 Candidate: 5.15.0.56.62~20.04.22 Version table: *** 5.15.0.56.62~20.04.22 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 5.4.0.26.32 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 3) crash dump of linux-image-generic-hwe-20.04 kernel to complete successfully 4) the kexec'ed kernel panics and fails to capture the kernel crash dump ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: kdump-tools 1:1.6.7-1ubuntu2.4 ProcVersionSignature: User Name 5.15.0-56.62~20.04.1-generic 5.15.64 Uname: Linux 5.15.0-56-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.25 Architecture: amd64 CasperMD5CheckResult: skip Date: Wed Dec 21 15:02:20 2022 SourcePackage: makedumpfile 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-5.15/+bug/2000257/+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
