Comment 53 for bug 35223

Having the same trouble with 12.04 LTS. I didn't have any issue running Maverick (10.10). The screen brightness on my Toshiba L-300-D laptop changes to full brightness with every reboot. In order to resolve an overheating problem I turn the acpi off at boot using "acpi_osi=" on the linux line in grub. When I check /sys/class/back.ight/acpi_ideo0/brightness it shows 0 which is where I want it.