This bug is also affecting me on 2 (ident) Xubuntu 15.10 systems:
uname -a: ### 4.2.0-22-generic #27-Ubuntu SMP Thu Dec 17 22:57:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=15.10 DISTRIB_CODENAME=wily DISTRIB_DESCRIPTION="Ubuntu 15.10"
also echo 1 or echo 3 > /proc/sys/vm/drop_caches temporary solves the issue
This bug is also affecting me on 2 (ident) Xubuntu 15.10 systems:
uname -a: ### 4.2.0-22-generic #27-Ubuntu SMP Thu Dec 17 22:57:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux RELEASE= 15.10 CODENAME= wily DESCRIPTION= "Ubuntu 15.10"
cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_
DISTRIB_
DISTRIB_
also vm/drop_ caches
echo 1 or echo 3 > /proc/sys/
temporary solves the issue