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I'm using Ubuntu 12.10 64bit. When load of CPU is low (0-6%) system is hanging for a moment for example:

  • scrolling in text editor, internet browser is not smooth
  • music in deadbeef/video in vlc skips

When I run totem or glxgears the problem disappears.

How I was trying to fix that (with no effects):

  • set CPU clock to highest
  • set GPU clock to highest
  • read logs - nothing disturbing
  • change DE to xfce, gnome classic, gnome shell
  • change clocksource from hpet to acpi_pm

Thanks for any help and hints in advance.

EDIT 1:

When I turned off acpi (parameter acpi=off in grub config) problem disappeared. But this solution has some cons. I'm sure that there is a better way to do that.

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Welcome to Ask Ubuntu! I recommend reporting this as a bug. (This question also has some good information about bug reporting.) This will probably be closed as off-topic, in accordance with the FAQ and this policy. – Eliah Kagan Jan 7 at 20:47
Looks like bug indeed. – gertvdijk Jan 7 at 21:41

closed as off topic by gertvdijk, Eliah Kagan, Jorge Castro, Ringtail, Luis Alvarado♦ Jan 8 at 1:34

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