Thanks Christopher,
I tried with "v3.18.5-vivid" from kernel mainline ppa (http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18.5-vivid/).
Fortunately, I could NOT reproduce the freeze with it. (Although it has some other problems like high fan speed, wlan issue..etc).
Thanks Christopher,
I tried with "v3.18.5-vivid" from kernel mainline ppa (http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.18.5- vivid/).
Fortunately, I could NOT reproduce the freeze with it. (Although it has some other problems like high fan speed, wlan issue..etc).