[Bug 910287] Re: ps hangs when listing root processes

[drink]

I'm having this problem on latest Quantal.
ps works, ps a or ps x hangs
top works fine

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https://bugs.launchpad.net/bugs/910287

Title:
  ps hangs when listing root processes

Status in “procps” package in Ubuntu:
  Confirmed

Bug description:
  when running "ps a" on my system, the command just blocks, and will
  not respond to Ctrl+C, nor killall -9 ps.

  This also happens in gnome-system-monitor, if and only if viewing all
  processes (not just "my processes").

  Strace output attached. Curiously, I can cancel out with Ctrl+C if
  using the strace wrapped process.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: procps 1:3.2.8-10ubuntu5
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Sat Dec 31 02:22:15 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  SourcePackage: procps
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.sysctl.conf: 2011-12-21T19:15:22.651303

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