Wired connection lost frequently since 28 March.

Having this problem since 28 March. I’m using 12.3 KDE,my internet connection is wimax desktop modem,I connect with lan cable. It was perfect,but now the connection lost frequently,usually after half an hour or 1 hour,I don’t know what’s the problem,I’ve try to connect my smartphone wifi with that modem,it’s ok,but not with my laptop. I have to shutdown the laptop and turn on to get the connection,sometimes it’s reconnect,sometimes not…

What’s the problem??? Is recent update broke my connection??? >:(

If you are using Network Manager then try switching to ifup and Vice versa.
(or)
If you are not actively using internet connection providers have been known to “drop” connections
(or)
Your browser cache may require clearing
(or)
Swicth off ipv6

Best of Luck