Below you will find pages that utilize the taxonomy term “volume controls”
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Hotkeys (special keys) Volume/Brightness Controls Don't Work After Suspend
What seems to solve this problem on Ubuntu 12.04 LTS (Lenovo Z500):
Open this file:
sudo gedit /etc/default/grub Modify the line as this:
GRUB_CMDLINE_LINUX="noapic" Close it and run the following:
sudo update-grub Restart your computer
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