On a HP Proliant was running trusty with vivid kernel from backports originally. Worked fine with userspace upgrade to wily. When I rebooted with the wily linux-generic kernel however I got a stack dump:
SW Raid1 on two CCISS based RAID0 disks, and dm_crypt. Kernel boots to prompt for cyrptoroot passphrase. After entering it and mounting entering the dm mapper init sequence the kernel crashes. I have a dropbear instance installed running from initramfs (for remote unlocking of root) and this is still runs.
dmesg attached from server.
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Aug 22 00:52 seq
crw-rw---- 1 root audio 116, 33 Aug 22 00:52 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.18-0ubuntu7
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 15.10
EcryptfsInUse: Yes
HibernationDevice: RESUME=/dev/mapper/vg0-swap
MachineType: HP ProLiant BL460c G1
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic root=/dev/mapper/vg0-root ro quiet nomdmonddf nomdmonisw
ProcVersionSignature: Ubuntu 3.19.0-26.28~14.04.1-generic 3.19.8-ckt4
RelatedPackageVersions:
linux-restricted-modules-3.19.0-26-generic N/A
linux-backports-modules-3.19.0-26-generic N/A
linux-firmware 1.146
RfKill: Error: [Errno 2] No such file or directory
Tags: wily uec-images
Uname: Linux 3.19.0-26-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 05/02/2011
dmi.bios.vendor: HP
dmi.bios.version: I15
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrI15:bd05/02/2011:svnHP:pnProLiantBL460cG1:pvr:cvnHP:ct23:cvr:
dmi.product.name: ProLiant BL460c G1
dmi.sys.vendor: HP
Attempting to mount /dev/md0 (the unencrypted /boot ) from within dropbear/busybox results in a kernel hardlock. ILO dump attached.