Comment 47 for bug 392948

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Sean Watson (sean.watson) wrote :

Same problem in 13.04. Setting /etc/default/grub and change the cmdline to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"

Then update-initramfs makes Fn L/R buttons work. Brightness applet still doesn't work, but at least it remembers the Fn keys work.

uname: Linux sean-Aspire-4736Z 3.8.0-30-generic #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux