I have HP Probook 4540S. My multimedia keys such as Wifi on/off & brightness control keys doesn't work with Ubuntu 13.04. (Keys function well with Ubuntu 12.04)

Both are working well in Windows.
Please give me a workaround..


I’m using hp4540s and I’ve stumled over this too. In Ubuntu 13.04 the kernel is 3.8.x-xx It supports WIFI out of the box but does not support Fn+brightness. If you go back to Ubuntu 12.04 with kernlel 3.2.x-xx you will have Fn-functions but you will not have WIFI. Workaround 1: http://www.ubuntugeek.com/how-to-fix-function-keys-fn-issue-after-upgrading-to-ubuntu-10-04lucid.html Follow the instructions BUT be sure to correct the NECESSARY line: GRUB_CMDLINE_LINUX="" After correction it should look as GRUB_CMDLINE_LINUX="acpi_backlight=vendor" Grub update needed. You’ll get you Fn+brightness keys working. BUT after each reboot the brightness will return to maximum. Workaround 2: I have decided to go back to 12.04 (actually linux mint 13 Maya). No Fn+brightness problems and the WIFI problem was perfectly solved with a new kernel 3.6.3. installation. http://compizomania.blogspot.com/2012/10/linux-kernel-363-ubuntu-12101204linux.html The tutorial is in Russian but it is understandable. Workaround 3: (only my invention - not tested though) Try downgrading kernel of your Ubuntu 13.04 from 3.8.x-xx to kernel 3.6.3

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