running strace on one of the treads shows the culprit:
poll([{fd=4, events=POLLIN}, {fd=8, events=POLLIN}], 2, 3998) = 0 (Timeout)
inotify_add_watch(8, "/etc/gdm",
IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR)
= -1 ENOENT (No such file or directory)
poll([{fd=4, events=POLLIN}, {fd=8, events=POLLIN}], 2, 3996) = 0 (Timeout)
inotify_add_watch(8, "/etc/gdm",
IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR)
= -1 ENOENT (No such file or directory)
poll([{fd=4, events=POLLIN}, {fd=8, events=POLLIN}], 2, 3996) = 0 (Timeout)
inotify_add_watch(8, "/etc/gdm",
IN_MODIFY|IN_ATTRIB|IN_CLOSE_WRITE|IN_MOVED_FROM|IN_MOVED_TO|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_ONLYDIR)
= -1 ENOENT (No such file or directory)
for some reason it is polling every 4 seconds and adding a watch on a
non-existent /etc/gdm directory
** Package changed: accountsservice (Ubuntu) => ubuntu-power-consumption
** Also affects: accountsservice (Ubuntu)
Importance: Undecided
Status: New
** Changed in: accountsservice (Ubuntu)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1234289
Title:
accounts-daemon is progressively causing more wakeups over time
Status in The Ubuntu Power Consumption Project:
New
Status in “accountsservice” package in Ubuntu:
New
Bug description:
Over the past few months accounts-daemon has been increasing the
number of wakeup events it generates, see:
http://reports.qa.ubuntu.com/power/eventstat/image/2736/machine/1/task
/accounts-daemon/details/
In April 2013 it was averaging about 13.5 wakeups per minute, now it
has increased to 17.5. This isn't much overall, but it does seem like
the trend is upwards and every wakeup takes the CPU out of deep sleep
and hence consumes a little more power.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-consumption/+bug/1234289/+subscriptions
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