Comment 65 for bug 935778

Toshiba portege M400 here,

3.5.0-21-generic #32-Ubuntu SMP

Brightness keys stop working after suspend/resume, first time. However, in a departure from others' observed behavior, my backlight/toshiba/brightness controls work. When the system is running after a resume, the 'brightness' value is '7', no matter what the screen dimness actually is. But, if you echo '7' >brightness, or any other number for that matter, the brightness changes immediately, and that brightness file does reflect the value that the brightness was set to.

HTH. Sure seems like toshibas have been the redheaded stepchild of motherboard feature support since they stopped compiling toshiba support into the default kernels.