Found this fix to this Bug:
Add the following line to your /lib/udev/rules.d/95-keyboard-force-
release.rules file:
ENV{DMI_VENDOR}=="LENOVO", ATTR{[dmi/id]product_name}=="IdeaPad Z370",
RUN+="keyboard-force-release.sh $devpath common-volume-keys"
Reference: (http://diyistheway.blogspot.mx/2012/06/ubuntu-1210-on-pink-
lenovo-z370.html)
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https://bugs.launchpad.net/bugs/1037465
Title:
[IdeaPad Z470, Realtek ALC269VB, Speaker, Internal] computer freezes
when setting volume
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