signond hangs and uses all CPU resources

[Ingo Gerth]

Today I noticed my CPU fan going crazy and couldn't find any reason at first, having pretty much only a browser window open.

Checking the system monitor, I noticed that signond used up 96% of my CPU resources, which caused the problem. It steadily hung at this level. Since I have an i7, my laptop still worked fine, I guess because it only used up one core.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: signond 8.43-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6
Uname: Linux 3.5.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Wed Mar 27 10:52:27 2013
InstallationDate: Installed on 2013-01-06 (79 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: signon
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ludek (lusmo)]

The same here. DistroRelease: Ubuntu 13.04 /64 bit Linux
ThinkPad-Z61t 3.8.0-17-generic #27-Ubuntu SMP Sun Apr 7 19:39:35 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[Mitchell (curious-mitchell)]

Yep, same problem here. Anyone found a workaround?
XPS 13 ultrabook, 3.8.0-25-generic, i5 core.

Was able to kill this as root.

[Bachi (m-bachmann)]

Same here, Dell Inspiron One 23, Ubuntu 13.4 64 bit.

[Richard (rimcaw)]

Same problem here, at least twice.

Ubuntu 13.04 64-bit.
3.8.0-32-generic #47-Ubuntu SMP Tue Oct 1 22:35:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[will-v-king (will-v-king)]

Ubuntu 12.10
Memory: 7.6GiB
Processor: Intel Core i5-3230M CPU @ 2.6GHz x 4
OS type: 64-bit
Disk: 349.2GiB
Lenovo V480s
My processor have 4unit and the signond used only one with 99.7% of it.

Currently I login to 2 user at the same time in the graphical with Gnome Classical.
And I opened several GUI-terminals.
##########
top:
Tasks: 293 total, 2 running, 289 sleeping, 0 stopped, 2 zombie
%Cpu(s): 27.3 us, 0.8 sy, 0.0 ni, 72.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 8011872 total, 5032800 used, 2979072 free, 497604 buffers
KiB Swap: 8220668 total, 0 used, 8220668 free, 2392448 cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10239 wangz 20 0 170m 6904 5848 R 99.7 0.1 13:35.97 signond
 2889 will 20 0 701m 138m 31m S 6.0 1.8 7:12.68 plugin-containe
11512 wangz 20 0 1096m 248m 51m S 3.3 3.2 0:46.36 firefox
10298 root 20 0 133m 17m 5964 S 1.0 0.2 0:21.12 Xorg
 2371 will 20 0 483m 11m 8496 S 0.7 0.2 0:21.98 multiload-apple
   10 root 20 0 0 0 0 S 0.3 0.0 0:00.71 ksoftirqd/1
10536 wangz 20 0 26100 2504 788 S 0.3 0.0 0:00.50 dbus-daemon
10586 wangz 20 0 466m 29m 12m S 0.3 0.4 0:06.82 compiz
10691 wangz 20 0 601m 17m 11m S 0.3 0.2 0:02.63 indicator-apple
10740 wangz 20 0 1420m 84m 23m S 0.3 1.1 0:04.36 chromium-browse
11760 wangz 20 0 24824 1776 1184 R 0.3 0.0 0:00.57 top
    1 root 20 0 24592 2472 1356 S 0.0 0.0 0:00.61 init
    2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
########
wangz@will-Lenovo-V480s:~$ uname -a
Linux will-Lenovo-V480s 3.5.0-44-generic #67-Ubuntu SMP Tue Nov 12 19:36:14 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
##########

[will-v-king (will-v-king)]

oh, also I'm using pptp and open vpn at the same time.

[René Walendy (0k53-rene-f830)]

Same here. Happened twice today.

Ubuntu 14.04 LTS
Mem: 1.9 GiB
Processor: Intel Core Duo P8700 @ 2.53Ghz x2
OS: 64bit
HP EliteBook 6930p

tail /var/log/syslog
Oct 9 18:47:01 odysseus2 signond[7107]: The signon plugin does not react on demand to stop: need to kill it!!!
Oct 9 18:47:02 odysseus2 signond[7107]: Challenge produces CRASH!

[Alberto Mardegan (mardy)]

Is this still happening?

[René Walendy (0k53-rene-f830)]

I did not experience this behavior on 16.04.2 LTS (not tested on the EliteBook I had when I marked myself affected, but on my new machine)

Mem: 7.7 GiB
Processor: Intel Core i5-4460 CPU @ 3.20GHz × 4
GPU: GeForce GTX 960/PCIe/SSE2 (with NVidia driver)
OS: 64bit
(diy desktop machine)

[Launchpad Janitor (janitor)]

[Expired for signon (Ubuntu) because there has been no activity for 60 days.]