I compared the udev rules (themselves, in /etc/udev/rules.d) on plucky with rules from 24.04 (on the exact same system, installed in the exact same way - to get the same set of rules), but couldn't find any significant differences. Looks to me now that this is more caused by the way the events are triggered and processed. It could also be systemd (due to udev) or initramfs-tools - some of the recent changes in these areas.
-- 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/2102236 Title: plucky/s390x (with root disk on dm?) does not come up after kernel update + reboot Status in Ubuntu on IBM z Systems: New Status in linux package in Ubuntu: New Status in lvm2 package in Ubuntu: New Bug description: While using the plucky daily from March 12 (that still comes with kernel 6.12) (and working around LP#2101831, by forcing the installation to not apply any updates) I get a system installed, which is at kernel level 6.12. Since 6.14 is out (in plucky release) since yesterday (March 12th) I tried to upgrade from 6.12 to 6.14, and the update itself seemed to be smooth (I couldn't find any errors while doing a full-upgrade in the terminal - see attached logs). But after executing a reboot, the system (in 3 different configurations, that use dm) does not come up again, and ends up in busybox, complaining that the root device couldn't be found: # s1lp15 FCP/SCSI multipath with LVM ALERT! /dev/disk/by-id/dm-uuid-LVM-SlleSC5YA825VOM3t0KHBVFrLJcNWsnwZsObNziIB9Bk2mSVphnuTEOQ2eFiBbE1 does not exist. Dropping to a shell! # s1lp15 2DASDs with LVM: ALERT! /dev/disk/by-id/dm-uuid-LVM-ePTbsojYPfgMacKXwpIMNMvxk80qGzlPhRYw7DJlovmqHyla9TK6NGc70p1JN29b does not exist. Dropping to a shell! # s1lp15 FCP/SCSI Multipath no LVM ALERT! /dev/disk/by-id/dm-uuid-part1-mpath-36005076306ffd6b60000000000002603 does not exist. Dropping to a shell! However, using a single disk without dm (so: no multipath, no lvm) the system is able to come up again after the reboot (after a kernel upgrade). # s1lp15 single DASD no LVM here the root device is: root=/dev/disk/by-path/ccw-0.0.260b-part1 and it exists. In the 3 different cases that (that repeatedly fail) "/dev/disk/by-id" is missing. I am not sure yet what's causing this, it can be an issue with the device-mapper/lvm2 but also udev rules or kernel. So maybe I need to add the kernel as affected component too (for now). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2102236/+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
