openSUSE Forums: Display brightness cannot be changed: OpenSUSE 12.2, Dell Inspiron 7520

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Display brightness cannot be changed: OpenSUSE 12.2, Dell Inspiron 7520 Jan 30th 2013, 22:36 I recently installed both Ubuntu 12.10 and OpenSUSE 12.2 64-bit, KDE, the two OSs sharing a new Dell Inspiron 7520 laptop. This laptop has an AMD Radeon HD 7730M graphics card. I installed fglrx64_xpic_SUSE122. My problem is that the brightness controls (Fn+F4 and Fn+F5) do not work under OpenSUSE, (but work perfectly under Ubuntu). All the rest of the Fn+Fx buttons (e.g., volume control, wireless on/off, etc) seem to work well for both OSs. Running xbacklight (e.g. xbacklight -dec 20) doesn't change a thing -- this command did not change display brightness. Adding "acpi_backlight=vendor acpi_osi=Linux" to the GRUB2-EFI Boot Loader options didn't work as well. Any suggestions on what I can do to activate the brightness controls on my laptop's keyboard? Thanks!

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