[ubuntu] no sound after upgrade to ubuntu 12.04

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http://ubuntuforums.org – hey everyone, I recently upgraded to ubuntu 12.04 but just after updating grub i lost sound so i have tried theese 2 links : https://help.ubuntu.com/community/So...otingProcedure https://docs.google.com/document/d/1...LMI/edit?pli=1 without result Accordingly to second link i found that the /etc/asound.conf was empty then i paste this code ---- code ------- pcm.!default { type plug slave.pcm { type hw card 0 device 1 } } -------------------------------------------- where i have the crad and device numbres ( card 0 device 1 )from this comand : aplay-l but without result. (Hardware)