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I have Ubuntu Mate (15.10) installed on my Dell laptop. Everything was working until I ran a software upgrader. After installing updates and rebooting sound disappeared.

Here are the outputs of aplay -l and sudo lspci -v: http://pastebin.com/EptH0unq

What might be the reason and how to fix the problem?

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  • I reinstalled Ubuntu Mate (16.04 this time), got my sound fixed, wifi broken again see this thread askubuntu.com/questions/753545/… (granted, broadcom is a pita for Linux). So there will be no follow up story
    – Stepan
    Apr 4, 2016 at 23:10

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Fellow Linux lovers, remember, that Linux viruses deal way less damage to ordinary users than regular updates. This is not a bug, but a feature. Community is small, so there is not as many attackers and/or testers Go for Windows, if you want it the other way around.

So, don't try to install updates right away. Backup the system first using Clonezilla or a similar tool. Keep old backups just in case.

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