It would be useful to know if one has made any specific zram config
changes, and if so, what your current config is just to help with the
debugging of this issue.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: zram-config (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1799497
Title:
4.15 kernel hard lockup about once a week
Status in linux package in Ubuntu:
Incomplete
Status in zram-config package in Ubuntu:
Incomplete
Status in linux source package in Bionic:
Confirmed
Status in zram-config source package in Bionic:
Confirmed
Bug description:
My main server has been running into hard lockups about once a week
ever since I switched to the 4.15 Ubuntu 18.04 kernel.
When this happens, nothing is printed to the console, it's effectively
stuck showing a login prompt. The system is running with panic=1 on
the cmdline but isn't rebooting so the kernel isn't even processing
this as a kernel panic.
As this felt like a potential hardware issue, I had my hosting provider give
me a completely different system, different motherboard, different CPU,
different RAM and different storage, I installed that system on 18.04 and moved
my data over, a week later, I hit the issue again.
We've since also had a LXD user reporting similar symptoms here also on
varying hardware:
https://github.com/lxc/lxd/issues/5197
My system doesn't have a lot of memory pressure with about 50% of free memory:
root@vorash:~# free -m
total used free shared buff/cache
available
Mem: 31819 17574 402 513 13842
13292
Swap: 15909 2687 13222
I will now try to increase console logging as much as possible on the
system in the hopes that next time it hangs we can get a better idea
of what happened but I'm not too hopeful given the complete silence on
the console when this occurs.
System is currently on:
Linux vorash 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux
But I've seen this since the GA kernel on 4.15 so it's not a recent
regression.
---
ProblemType: Bug
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Oct 23 16:12 seq
crw-rw---- 1 root audio 116, 33 Oct 23 16:12 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse:
Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with
exit code 1: Cannot stat file /proc/22822/fd/10: Permission denied
Cannot stat file /proc/22831/fd/10: Permission denied
DistroRelease: Ubuntu 18.04
HibernationDevice:
RESUME=none
CRYPTSETUP=n
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 046b:ff10 American Megatrends, Inc. Virtual Keyboard
and Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Intel Corporation S1200SP
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
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 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-38-generic
root=UUID=575c878a-0be6-4806-9c83-28f67aedea65 ro biosdevname=0 net.ifnames=0
panic=1 verbose console=tty0 console=ttyS0,115200n8
ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-38-generic N/A
linux-backports-modules-4.15.0-38-generic N/A
linux-firmware 1.173.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
Tags: bionic
Uname: Linux 4.15.0-38-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: False
dmi.bios.date: 01/25/2018
dmi.bios.vendor: Intel Corporation
dmi.bios.version: S1200SP.86B.03.01.1029.012520180838
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: S1200SP
dmi.board.vendor: Intel Corporation
dmi.board.version: H57532-271
dmi.chassis.asset.tag: ....................
dmi.chassis.type: 23
dmi.chassis.vendor: ...............................
dmi.chassis.version: ..................
dmi.modalias:
dmi:bvnIntelCorporation:bvrS1200SP.86B.03.01.1029.012520180838:bd01/25/2018:svnIntelCorporation:pnS1200SP:pvr....................:rvnIntelCorporation:rnS1200SP:rvrH57532-271:cvn...............................:ct23:cvr..................:
dmi.product.family: Family
dmi.product.name: S1200SP
dmi.product.version: ....................
dmi.sys.vendor: Intel Corporation
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