It's a clean install of Ubuntu 13.04 running 3.2.0-30 and so far I've tried:
Echoing 0 to /sys/class/backlight/intel_backlight/brightness
Adding acpi_backlight=vendor go the grub config
Downgrading to 3.8.0-29 (this just dumps me to a terminal and doesn't load the GUI)
I'm now kicking off the upgrade to 13.10 beta, to see if that works :-)
Add me to the list of affected people....
It's a clean install of Ubuntu 13.04 running 3.2.0-30 and so far I've tried: backlight/ intel_backlight /brightness vendor go the grub config
Echoing 0 to /sys/class/
Adding acpi_backlight=
Downgrading to 3.8.0-29 (this just dumps me to a terminal and doesn't load the GUI)
I'm now kicking off the upgrade to 13.10 beta, to see if that works :-)
Matt