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[Druid <780424@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

As background I'm running multi-GPU multi-session multi-head with 3
screens on two NVIDIA GPU Quadro NVS 290 (G86GL) cards (one on one, two
on the other). Machine is a quad core with 8G ram and 8G swap.
Individual gnome sessions on each screen (ie I can't transfer programs
between screens and each screen has full menus).

Occasionally after unlocking my mouse cursor rapidly flickers between
screens and the machine is totally unresponsive at the console.

Logging in via ssh and I can see load and cpu usage rapidly increases,
memory usage also goes through the roof until all memory and swap is
consumed at which point the oom-killer kicks in (or possibly Xorg
crashes) , kills Xorg and I can log back in (with my session lost).

In the mistaken assumption that I didn't have enough swap I increased it
(from 2G to 10G) all this did was allow the machine to be a little bit
more responsive for longer but Xorg still continued to consume memory,
last time it got to 11.2G of virtual and a load average of 24 before I
rebooted the machine. As a comparison, right now Xorg has 153m with load
averages all at ~0.5.

While I realise this may not include enough as is this is a reasonably
regular (and very annoying) bug for me, if any further details can be
collected at the time please let me know, I can (within reason) run
anything as needed.

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/780424

Title:
  Xorg unresponsive after screensaver unlock with Dual Head