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[Perowansa Paruka <perowansaparuka@xxxxxxxxx>]

** Changed in: emacs24 (Ubuntu)
     Assignee: (unassigned) => Perowansa Paruka (perowansaparuka)

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https://bugs.launchpad.net/bugs/1454869

Title:
  emacs23 and emacs24 search display bugs on machines with multiple cpus

Status in emacs23 package in Ubuntu:
  New
Status in emacs24 package in Ubuntu:
  New

Bug description:
  An Ubuntu system with multiple cpus corrupts the display while
  searching.  This is reproducible via ssh as well as on a local
  terminal.  I've seen this under Ubuntu 14.04.2 with emacs23
  (23.4+1-4.1ubuntu1) and emacs24 (24.3+1-2ubuntu1).

  Here's an askubuntu question with reproduction instructions and a screenshot:
  http://askubuntu.com/questions/418546/emacs-screen-drawing-issues-over-ssh

  1. emacs ~/.bash_history
  2. C-s cd (incremental search for "cd")
  3. keep hitting C-s (aka jump to the next search result)

  This can be easily reproduced under VirtualBox, create a VirtualBox vm
  with two vcpus, search in emacs and terrible things happen.  Reduce to
  one vcpu and everything's peachy keen.

  Martin Trojer posted a patch to bug-gnu-emacs mailing list which fixed it for me:
  https://lists.gnu.org/archive/html/bug-gnu-emacs/2015-03/msg00698.html
  https://github.com/martintrojer/emacs/commit/bdff1ff98d02f4307659c052d0b35a40a36f0706

  This patch is attached.

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