** Summary changed: - Kernel 6.2 does not boot on s390x + [23.04] Kernel 6.2 does not boot on s390x
-- 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/2003348 Title: [23.04] Kernel 6.2 does not boot on s390x Status in Ubuntu on IBM z Systems: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: The kernel team created a first kernel 6.2 for testing purposes. linux-unstable 6.2.0-4.4 ia available in ppa:canonical-kernel- team/bootstrap However this kernel does not boot on s390x and crashes: https://pastebin.canonical.com/p/qXj4g4bgGH/ or: ... Ý 0.408281¨ md: Waiting for all devices to be available before autodetect Ý 0.408283¨ md: If you don't use raid, use raid=noautodetect Ý 0.408285¨ md: Autodetecting RAID arrays. Ý 0.408287¨ md: autorun ... Ý 0.408288¨ md: ... autorun DONE. Ý 0.408405¨ /dev/root: Can't open blockdev Ý 0.408409¨ VFS: Cannot open root device "disk/by-path/ccw-0.0.0400-part1" or unknown-block(0,0): error -6 Ý 0.408412¨ Please append a correct "root=" boot option; here are the availa le partitions: Ý 0.408415¨ Kernel panic - not syncing: VFS: Unable to mount root fs on unkno wn-block(0,0) Ý 0.408418¨ CPU: 2 PID: 1 Comm: swapper/0 Not tainted 6.2.0-4-generic #4-Ubun tu Ý 0.408421¨ Hardware name: IBM 2964 N63 400 (z/VM 6.4.0) Ý 0.408423¨ Call Trace: Ý 0.408425¨ Ý<00000000b5d881b2>¨ dump_stack_lvl+0x62/0x90 Ý 0.408433¨ Ý<00000000b5d78f5c>¨ panic+0x174/0x360 Ý 0.408438¨ Ý<00000000b723e4fe>¨ mount_block_root+0x16e/0x210 Ý 0.408444¨ Ý<00000000b723e7b8>¨ prepare_namespace+0x168/0x1e0 Ý 0.408448¨ Ý<00000000b723dd46>¨ kernel_init_freeable+0x1de/0x1f0 Ý 0.408451¨ Ý<00000000b5d8948e>¨ kernel_init+0x2e/0x1a0 Ý 0.408455¨ Ý<00000000b50d3d30>¨ __ret_from_fork+0x40/0x60 Ý 0.408459¨ Ý<00000000b5d98e4a>¨ ret_from_fork+0xa/0x40 02: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 B50E215E or: [ 8.693187] /dev/root: Can't open blockdev [ 8.693191] VFS: Cannot open root device "disk/by-path/ccw-0.0.260b-part1" or unknown-block(0,0): error -6 [ 8.693194] Please append a correct "root=" boot option; here are the available partitions: [ 8.693198] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) Initially we thought it might be related to LVM/DM, but it's not, since it happens also on single DASD disk installation without LVM and also on NVMe disks. It also happens on z15 and on z13. Messages indicate that either the "root=" argument is wrong or not there. I can check /proc/cmdline since the system ends up in a crash for me. However, installing and using 6.1.0-9 works fine. _____ Steps to re-create: - Install Ubuntu lunar using: https://cdimage.ubuntu.com/ubuntu-server/daily-live/current/lunar-live-server-s390x.iso or: https://cdimage.ubuntu.com/ubuntu-server/daily-live/pending/lunar-live-server-s390x.iso (- get it updated: sudo apt -y -q update && sudo apt -y -q full-upgrade && sudo apt autoremove --purge ) - sudo add-apt-repository --yes ppa:canonical-kernel-team/bootstrap - $ sudo apt update - $ sudo apt install --yes linux-image-6.2.0-4-generic linux-modules-6.2.0-4-generic linux-modules-extra-6.2.0-4-generic linux-headers-6.2.0-4-generic - $ sudo reboot - open the console (e.g. Operating Systems Messages) and monitor the boot/IPL process, it's fail like above Do the same with kernel 6.1: sudo apt install --yes linux-image-6.1.0-9-generic linux-modules-6.1.0-9-generic linux-modules-extra-6.1.0-9-generic linux-headers-6.1.0-9-generic and the system reboots successfully. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2003348/+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
