Same problem here on Acer C720 Chromebook. I have 2GB of swap space on the SSD (I replaced the original 16GB M2 SSD with a 256GB version) and whenever swap is used I get this problem.
Linux localhost 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
echo 3 > /proc/sys/vm/drop_caches # 1 isn't enough works around the issue for me too
Same problem here on Acer C720 Chromebook. I have 2GB of swap space on the SSD (I replaced the original 16GB M2 SSD with a 256GB version) and whenever swap is used I get this problem.
Linux localhost 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
echo 3 > /proc/sys/ vm/drop_ caches # 1 isn't enough works around the issue for me too