sudo apt-get install acer-acpi acerwificontroller
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  acer-acpi acerwificontroller
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 78.5kB of archives.
After unpacking 319kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  acer-acpi acerwificontroller
Install these packages without verification [y/N]? y
Get:1 http://www.mumblyworld.info gutsy/main acer-acpi 0.9.1+2.6.22-14.46-mumbly5 [71.6kB]
Get:2 http://www.mumblyworld.info gutsy/main acerwificontroller 0.1-mumbly3 [6852B]
Fetched 78.5kB in 0s (108kB/s)        
Selecting previously deselected package acer-acpi.
(Reading database ... 88954 files and directories currently installed.)
Unpacking acer-acpi (from .../acer-acpi_0.9.1+2.6.22-14.46-mumbly5_i386.deb) ...
Selecting previously deselected package acerwificontroller.
Unpacking acerwificontroller (from .../acerwificontroller_0.1-mumbly3_i386.deb) ...
Setting up acer-acpi (0.9.1+2.6.22-14.46-mumbly5) ...

Setting up acerwificontroller (0.1-mumbly3) ...