Specificity of queries for stats


Piwik has been a good tracking software for general data, but in my Piwik install I was noticing a lack of fine-grained statistics.

For example, the Operating Systems widget shows Android, Linux, etc. but never the version or variant.

Is there a way to get Piwik to log so I know how many users of a site are on Fedora/Ubuntu, and see if mobile users are on Android version 2, 3, or 4?

I also noticed that when you click the graph icon that looks like /^/ it only shows a graph of that specific page or referrer, and lets you compare the graph to that of another. Is there any way to actually see who is looking at page xyz? By country/OS variant/other detail?