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[ubuntu] [Toshiba-Satellite] Wifi + Sound "Freezing"

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http://ubuntuforums.org – Hi, I use Natty on a Toshiba Satellite L505-10N. I have two problems that may or not be related. The first one is overheating of the computer, even with no activity. The fan is running. As I saw on many topics, that problem might be due to dust in the fan. The computer is over 1 year old and used everyday. The second problem comes after from 10 minutes to 1 hour. Simultaneously, both the sound (playing with Amarok or VLC through Pulseaudio and Jack) and the wifi start to malfunction. The sound blocks every ~15 secs for ~1 sec. The wifi speed drops to 0B/s or close and sometimes even loose (Hardware)