Hi Dann, Thanks for the comments.
VM has 4G, bumping the craskkernel size 256 still fails, but moving up to 512M allows this to work, but the equivalent kernel in jammy works with 192M... Thoughts? And you're quite right, once the dump works, I see bug 1970672 [ 3.684815] kdump-tools[487]: Starting kdump-tools: [ 3.685258] kdump-tools[493]: * running makedumpfile -c -d 31 /proc/vmcore /var/crash/202212211756/dump-incomplete Copying data : [100.0 %] \ eta: 0s [ 5.850607] kdump-tools[510]: The kernel version is not supported. [ 5.851463] kdump-tools[510]: The makedumpfile operation may be incomplete. [ 5.852609] kdump-tools[510]: The dumpfile is saved to /var/crash/202212211756/dump-incomplete. [ 5.853977] kdump-tools[510]: makedumpfile Completed. [ 5.857098] kdump-tools[493]: * kdump-tools: saved vmcore in /var/crash/202212211756 [ 5.887243] kdump-tools[493]: * running makedumpfile --dump-dmesg /proc/vmcore /var/crash/202212211756/dmesg.202212211756 [ 5.888335] kdump-tools[516]: The kernel version is not supported. [ 5.888940] kdump-tools[516]: The makedumpfile operation may be incomplete. [ 5.889589] kdump-tools[516]: The dmesg log is saved to /var/crash/202212211756/dmesg.202212211756. [ 5.890346] kdump-tools[516]: makedumpfile Completed. [ 5.890998] kdump-tools[493]: * kdump-tools: saved dmesg content in /var/crash/202212211756 [ 5.894985] kdump-tools[519]: Wed, 21 Dec 2022 17:56:45 +0000 [ 5.898013] kdump-tools[520]: Rebooting. [ 5.938356] reboot: Restarting system -- 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: Triaged Status in makedumpfile package in Ubuntu: Triaged 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
