linux-image-4.4.0-159-generic produces "BUG unable to handle kernel NULL pointer dereference" with bcache module
the kernel never boots then.
blacklisting the bcache module resolves the problem.
For more strings please see attached image
Ubuntu 4.4.0-159.187-generic 4.4.185
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Aug 16 13:18 seq
crw-rw---- 1 root audio 116, 33 Aug 16 13:18 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.20.1-0ubuntu2.19
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 16.04
HibernationDevice: RESUME=UUID=ade296a6-5255-4839-9cee-fde7af090c42
InstallationDate: Installed on 2016-06-08 (1163 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
IwConfig: Error: [Errno 2] No such file or directory
MachineType: HP ProLiant SE316M1
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-159-generic root=UUID=051b7186-7bab-4cff-af27-325b58e7f8a7 ro ipv6.disable=1 modprobe.blacklist=bcache
ProcVersionSignature: Ubuntu 4.4.0-159.187-generic 4.4.185
RelatedPackageVersions:
linux-restricted-modules-4.4.0-159-generic N/A
linux-backports-modules-4.4.0-159-generic N/A
linux-firmware 1.157.22
RfKill: Error: [Errno 2] No such file or directory
Tags: xenial xenial
Uname: Linux 4.4.0-159-generic x86_64
UnreportableReason: The report belongs to a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: False
dmi.bios.date: 07/02/2013
dmi.bios.vendor: HP
dmi.bios.version: R02
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrR02:bd07/02/2013:svnHP:pnProLiantSE316M1:pvr:cvnHP:ct23:cvr:
dmi.product.name: ProLiant SE316M1
dmi.sys.vendor: HP
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1840438
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.