The problem can be reproduced without suspending. Disk I/O during power
changes triggers the problem.
1. Start heavy disk I/O in the background: sudo dd if=/dev/sda
of=/dev/null bs=131072
2. Start vmstat to monitor disk I/O: vmstat 1
3. Plug/unplug the AC adapter a couple of times.
4. Vmstat sh
I upgraded gnome-keyring from 2.26.0-0ubuntu4 to 2.26.0-0ubuntu6, and
the problem with gnome-keyring is back. When I ssh to another server,
gnome-keyring-daemon starts using 100% CPU and the ssh client hangs.
Finally, gnome-keyring-daemon dies. 2.26.0-0ubuntu4 fixed this problem,
but it reappeared
