Q:

Checking if a bug was fixed

How could i check if an issue was fixed with past updates ?
Actually im looking for bug related with wireless can't connect after suspend mode in Ubuntu 14.04.
At this moment i disabled all power management options to prevent it.

A:

The first step is to find where the bug is reported in Launchpad. If it's not, report it. 
Log in to launchpad (in the above link you have more info about that), go to the main page of the bug, and then: 

Add yourself to the "affected-by-the-bug" list,
And subscribe to the mail notifications. You can decide to receive all messages, or just the changes of state (which will tell you if the bug is marked as fixed or whatever).

