Comment 26 for bug 935778

Doh, silly logic error reading the value being written. That's why it's helpful when you're able to test your code :)

Fixed, please try the package below. It's useful to know that the value is reset to 0 after suspend, and it will be interesting to see whether simply writing 1 gets both the acpi_video0 and toshiba backlights working again. If they aren't working after you write 1 to hci_backlight, be sure to check whether or not the value it reads is still 1.

http://people.canonical.com/~sforshee/lp935778/toshiba-acpi-dkms_0.6~lp935778v201203291004_all.deb