This morning my ubuntu 14.04 has been frozen twice. The second time happened 15 or 20 mins ago. The first time is probably 2 hours ago. Each time, I waited for 10 mins, and nothing was improved, so I had to powered off and on.
I guess it was related to that yesterday, my ubuntu was frozen for a short while, and then restarted itself.
I would like to know what caused my problems, and how to solve them. Note that: before the problem happened each time, my internal wifi card's connection was on and off. I had the wifi problems for quite some time, but never had the Ubuntu frozen problem associated with it.
/var/log/syslog is here
$ cat /proc/net/igmp Idx Device : Count Querier Group Users Timer Reporter 1 lo : 1 V3 010000E0 1 0:00000000 0 2 eth0 : 1 V3 010000E0 1 0:00000000 0 5 wlan0 : 2 V3 FB0000E0 2 0:00000000 0 010000E0 1 0:00000000 0 $ cat /proc/sys/net/ipv4/igmp_max_memberships 20