Takashi Iwai changed bug 956403
What Removed Added
Flags   needinfo?(silviu_marin-caea@otpbank.ro)

Comment # 30 on bug 956403 from
Thanks, it's good to know.  One thing we can try with the recent kernel is to
pass acpi_osi option, something like
  acpi_osi="!Windows 2009"
and/or
  acpi_osi="!Windows 2012"

This will make some BIOS behaving in the compatible mode.

Note that, when you add the above in a config file like /etc/default/grub,
you'd need to escape the double-quote letters like
  acpi_osi=\"!Windows 2009\"


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