Still missing the point!
Before you do anything, you need to ask the cabin crew one vital and simple question,
"Can you actually see smoke in the cabin?"
If there is, you know it's a land ASAP.
As an aside, how many times are cargo 'fire' warnings triggered by spraying the holds. Don't recall all of these weekly events resulting in an evacuation. Cargo fire warning in flight, different beast altogether. Get the thing heading down and continually re asses. Once on ground, unless there was actual evidence of smoke or heat however, a full evacuation would then be unlikely.
Look, we're trying to analyise the decision making skills of a Captain from information provided by a newspaper report. It was written by a non native English speaker and by someone obviously not familiair with aviation. I see the crap that comes out of UK papers relating to "DEATH DIVE FROM 30,000FT!" so I can only imagine the inaccuracies that are present in this report.
Harry