Public bug reported:
I recently upgraded to Wily and I discovered that my system hard freezes
about 2-3 times a day. This is the usual: unresponsive keyboard
(including magic sysrq), unresponsive USB, no response to pings over the
network, music/audio loops, as well as no evidence of errors in syslog,
kern.log, Xorg.log.
However, there's one very unusual aspect of this lockup: I have an on
screen clock to the second and when the lockup occurs, the clock keeps
ticking by the second! This means that code must be executing
somewhere... This happened all but one occurance of hard freeze, where
the clock also froze. In fact, I was on Facebook at one point and saw
that I was disconnected. The facebook UI then followed up with the
animation of "Reconnecting... 10... 9... 8...".
I feel like posting here is a very long shot, but maybe someone else has
something similar.
Next time this happens I'll try to hook this machine to ethernet to see
if there's any response and try to ssh into it. I could also write a
program that writes to syslog every 5 seconds and see if those get
written when the machine is "locked up". Not sure what else I can do at
this point. I can also memtest or play kernel roulette with mainline,
but the machine was previously stable on utopic (with BIOS instead of
UEFI boot, tho).
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-16-generic 4.2.0-16.19 [modified:
boot/vmlinuz-4.2.0-16-generic]
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: shuhao 1884 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Oct 22 17:49:21 2015
HibernationDevice: RESUME=UUID=0b162d26-cb30-4f74-b80c-6cd03fd55a69
InstallationDate: Installed on 2015-10-14 (8 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20151013)
MachineType: LENOVO 4180J4C
ProcEnviron:
LANGUAGE=en_CA:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/zsh
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-16-generic.efi.signed
root=/dev/mapper/xubuntu--vg-root ro noprompt quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.2.0-16-generic N/A
linux-backports-modules-4.2.0-16-generic N/A
linux-firmware 1.149
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/05/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET76WW (1.46 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4180J4C
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr83ET76WW(1.46):bd07/05/2013:svnLENOVO:pn4180J4C:pvrThinkPadT420:rvnLENOVO:rn4180J4C:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4180J4C
dmi.product.version: ThinkPad T420
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1509111
Title:
Hard lockup but certain UI elements keeps changing
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