Comment 21 for bug 935778

It's TOS6208:00. In there is no "backlight" file, but a "backlight" directory. This contains nothing but the single subdirectory "toshiba", which is the link target of /sys/class/backlight/toshiba. A directory listing is attached.

I hope you understand that I don't want to play with those files without your explicit request. Jonathan Buzzard said on the linux-acpi mailing list "The Toshiba provided Windows user space programs go to some length to establish what models they are running on before attempting any funny business. Over the years a number of users have tried randomly poking the HCI without knowing what they are doing and bricked their laptops. If you understood how the HCI really works under the hood, you would understand. The error checking in it last time I looked is virtually none existent." See http://www.spinics.net/lists/linux-acpi/msg20355.html