Hello, I sumbitted the report on LXD since that is the only thing I have installed on the server that is actively running as Stéphane mentioned on https://github.com/lxc/lxd/issues/5197
I also thought it maybe hardware issue, but since upgrading to 18.04 in May I have experienced this on a variety of hardware, and even though I thought it may be upgrade issue it is also not the case. I also thought it was memory related, since now it occurs, as Stéphane mentiones around once a week, but in my case on different servers. THe last server where it happened didn't have any issue for the last maybe two months and was not that loaded in terms of memory, but it seems more frequent in servers that are actively used in both memory and CPU. It doesn't happen on blade hosts that only have 2-4 LXD containers and 4GB of RAM, it has only happened on 16GB, 24GB, 48GB and 128GB of RAM HP and Dell servers, that have a little more load (minimum 6 containers up to 20) At least I a not alone, but have no clue how to recreate or address this issue (since also logs provide no information) I could also try some kernels. On 4.4 as Stephane mentioned didn't happen, int only started happening on GA (as he also mentiones) of 18.04. I have been constantly upgrading the kernel to no avail. So it seems it could have been introduced before. strangely and thankfully it doesn't happen on my main production server (Except yesterday crash on one of them). Mostly on development servers that are actively used (developers are not happy) ** Bug watch added: LXD bug tracker #5197 https://github.com/lxc/lxd/issues/5197 -- 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/1799497 Title: 4.15 kernel hard lockup about once a week Status in linux package in Ubuntu: Incomplete Status in linux source package in Bionic: Incomplete 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799497/+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
