CPU

After upgrading my laptop from Kubuntu 12.04 LTS to 14.04 LTS, I noticed that the laptop runs hotter than usual.

Upon investigating further, I found that PackageKit was the process that was consuming lots of CPU and memory.

For example, here is a sample output from htop, showing packagekitd maxing out one core, and eating up almost a quarter of the laptop's RAM:

After I upgraded my Sony Ericsson Xperia Arc from 2.3.4 (GingerBread) to 4.0.4 (Ice Cream Sandwich), I noticed that it was laggy and slow.

With Gingerbread 2.3.4, and ADW Launcher as the home screen, everything was fine.

Upon using the "top" command, either from ConnectBot, or from adb via the USB case, I noticed that com.google.media and com.google.acore are eating up most of the CPU time.

You can also go into Settings Developer Options and turn on the CPU overlay which will tell you the top processes eating up CPU.

Ubuntu decided several months ago to forgo its policy of sticking with Firefox 3.6, and go with the latest versions from Mozilla.

With Firefox 13 running on Ubuntu 10.04, I had good performance, and did not suffer from this problem that I am about to describe. The only issue I faced was excessive disk activity and that was fixed by disabling the FireBug extension. Other than that, Firefox was speedy and responsive.