[Bug 1582839] Re: Update manager pegs compiz at high CPU load after installing updates

[Brian Murray]

*** This bug is a duplicate of bug 1637180 ***
    https://bugs.launchpad.net/bugs/1637180

** This bug is no longer a duplicate of bug 1622510
   update-manager popup consumes a lot of CPU
** This bug has been marked a duplicate of bug 1637180
   "The computer needs to restart" dialog constantly eats CPU

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https://bugs.launchpad.net/bugs/1582839

Title:
  Update manager pegs compiz at high CPU load after installing updates

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  Running 16.04, after installing updates, and leaving the confirmation
  dialog box open for some while in the background, I notice the laptop
  is hot, with fans running.

  "top" shows the compiz process consuming high CPU.

  Closing the update-manager window causes the CPU load to drop
  immediately.

  Strace suggests the update manager process is chatting with the X
  server - possibly repainting continuously?

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