Brightness Controls Do Not Work after Suspend-to-Disk

[Chris Tyler]

I have a Toshiba Z-830 (the Portege i7 version) which works fabulously
under F17: 15 second boot, <2 second resume from RAM, all features
working (except the fingerprint reader, for which I wait hopefully for a
future driver).

I recently configured hybrid suspend - suspend-to-RAM for 15 minutes
followed by suspend-to-disk. Oddly, when resuming from suspend-to-disk,
the brightness controls do not work, and the screen is at WHERE ARE MY
SUNGLASSES brightness. Everything else seems to work fine after the
resume.

Any thoughts/suggestions on possible causes or (better yet) possible
fixes?

Thanks in advance --

-Chris