[Bug 850935] Re: upstart-udev-bridge at 100% CPU

[James Hunt]

I'm not now convinced the kernel isn't spamming us. Can you do the
following:

1) sudo stop upstart-udev-bridge
2) Plonk the attached bug-850935.conf into /etc/init/.
3) Reboot with the battery attached.

bug-850935.conf will create a file /tmp/bug-850935.log with 1 line for
every "power_supply-device-added" event emitted, but will stop logging
if it sees >10 such events. If that file contains >1 entry, the bug is
with udev or the kernel.

There is a secondary bug which is triggering the dbus assert failure,
but I'm not clear yet if its in Upstart/nih or in dbus itself.

** Attachment added: "upstart job config file to log power_supply-device-added events."
   https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/850935/+attachment/2412359/+files/bug-850935.conf

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https://bugs.launchpad.net/bugs/850935

Title:
  upstart-udev-bridge at 100% CPU

Status in “upstart” package in Ubuntu:
  New

Bug description:
  I noticed that upstart-udev-bridge was using 100% of one of my CPU
  cores. I noticed this after a compiz crash; I'm not sure if the
  problem was happening before the crash.

  Attached is an strace log:
  sudo strace -f -o upstart-udev-bridge.strace -v -p 291

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: upstart 1.3-0ubuntu8
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  Date: Thu Sep 15 09:30:34 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: upstart
  UpgradeStatus: Upgraded to oneiric on 2011-09-02 (12 days ago)

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