[Bug 829980] Re: upstart-udev-bridge eats 100% cpu calling dbus_message_iter_append_basic()

[James Hunt]

Thanks to all those who attached logs. All logs show trailing binary
0x02 (CONTROL-B) bytes at the end of the POWER_SUPPLY_MANUFACTURER
value. So I think this single rogue byte, encoded in the battery meta-
data, is ironically indirectly causing you high battery drain :-(

The fact that we've so far only seen this problem with power supply
manufacturer strings suggests that it is *highly* unlikely there will be
any adverse effects of the proposed fix since even if an Upstart job
were to care about a battery device, it really shouldn't be caring about
the specific manufacturer details.

Please could those affected by this issue test the fix available in the
following PPA:

  https://launchpad.net/~jamesodhunt/+archive/bug-829980

To install the fix:

1) In a terminal, run:

   sudo add-apt-repository ppa:jamesodhunt/bug-829980

  This will show you some text and ask you to press return to enable
this repository.

2) Run:

  sudo apt-get update && sudo apt-get upgrade

Step (2) should pull in the latest test version of Upstart (version
"1.3-0ubuntu12~bug829980"). If so, reboot as normal and then update this
bug with your results.

[Note: I've tested this fix, but note that I do not have access to any
of these bad batteries. So, in the unlikely event you *do* experience
issues with the fix, remove your battery and boot from AC power].

Thanks in advance.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to upstart in Ubuntu.
https://bugs.launchpad.net/bugs/829980

Title:
  upstart-udev-bridge eats 100% cpu calling
  dbus_message_iter_append_basic()

Status in “linux” package in Ubuntu:
  Confirmed
Status in “upstart” package in Ubuntu:
  In Progress

Bug description:
  the segv was created by me sending a kill -11. but the 100% cpu is
  unbarable

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: upstart 1.3-0ubuntu6
  ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
  Uname: Linux 3.0.0-8-generic x86_64
  NonfreeKernelModules: fglrx
  Architecture: amd64
  Date: Sat Aug 20 11:48:34 2011
  ExecutablePath: /sbin/upstart-udev-bridge
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64+mac (20110803.1)
  ProcCmdline: upstart-udev-bridge --daemon
  ProcEnviron: PATH=(custom, no user)
  Signal: 11
  SourcePackage: upstart
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libc.so.6
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   dbus_message_iter_append_basic () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? ()
  Title: upstart-udev-bridge crashed with SIGSEGV in dbus_message_iter_append_basic()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/829980/+subscriptions