First of all I'm not an Expert in Ubuntu.
I am using Ubuntu 14.04.4 on my Dell Inspiron 11 3147. Since Ubuntu 14.04.4 Released, it's freezing frequently. Especially when I'm Browsing the Internet (I'm currently using Opera but I tried Chrome and Firefox too). It was okay when I was using 14.04.3. But the Latest Version is totally Freezing my Laptop (Even Mouse doesn't work). I tried Magic SysRq Key Combination (Alt + SysRq + REISUB) but nothing happens. What can I do to fix this Problem?
P.S. I fresh installed 14.04.4 when it Released. And the Same thing happens on Ubuntu 15.10 too.
Edit: Output of
lspci -k | grep -EA2 'VGA|3D' :
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e) Subsystem: Dell Device 064d Kernel driver in use: i915
Edit 2: Output of
free --human :
abdullah@abdullah-Inspiron-11-3147:~$ free --human total used free shared buffers cached Mem: 3.7G 425M 3.3G 44M 23M 190M -/+ buffers/cache: 211M 3.5G Swap: 1.9G 0B 1.9G