n900 acting irresponsive
 

yes as the title mentioning , my N900 all of a sudden started to act irresponsive , .
checked on charging and without charging .

things happening :

1- qbw on desktop are taking long to open .
when ever i receive a text then clicking on the conversation widget , it takes about 5-6 seconds to open the widget .

2- desktop switcher taking as usual the same 5-6 sec to act.

i didn't check other things and i dont want to :$

and as i have checked just right now , qcpufreq showing temp 46 degrees while on charging and just this TMO page open and nothing else .

so what i want is, is there anything to check what is causing this irresponsiveness ?