Comment 29 for bug 228633

powertop gives me 4 suggestions - and i accept all of them. After accepting the suggestions and closing down powertop i have not had any freezes. So my guess is that one of those 4 things makes it freeze in default configuration. But which one? - i don't know enough about powertop and kernel to guess. I will over the next couple of days try to disable one by one and see if i can figure it out.

Suggestion: increase the VM dirty writeback time from 5,00 to 15 seconds with:
  echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
This wakes the disk up less frequenty for background VM activity
 Q - Quit R - Refresh W - Increase Writeback time

Suggestion: Enable SATA ALPM link power management via:
  echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
or press the S key.
 Q - Quit R - Refresh S - SATA Link Power Management

Suggestion: Disable 'hal' from polling your cdrom with:
hal-disable-polling --device /dev/cdrom 'hal' is the component that auto-opens a
window if you plug in a CD but disables SATA power saving from kicking in.
 Q - Quit R - Refresh K - kill hald-addon-storage

Suggestion: Disable the unused bluetooth interface with the following command:
  hciconfig hci0 down ; rmmod hci_usb
Bluetooth is a radio and consumes quite some power, and keeps USB busy as well.
 Q - Quit R - Refresh B - Turn Bluetooth off