You should be able to set up One event using one hotkey to the event "DSP->Backlight On/Off" which will toggle it (providing you have the latest version as there was a bug in .20 I think).
I use LCDC 1.02 build22 on a GLK12232-25sm and backlight off doesnt work for me
it works fine from the test area in configuration panel, but wont work @ all from the events ....
Backlight OFF actually works if i trigger it w/ a keypad press, but it wont if i trigger it w/ an on_finish event ... its very weird ... backlight intensity has no effect in the lcdc configuration (tried it coz i thought intensity 100% in the config was actually the problem for my on finish event ... making it bright whenevr lcdc was on) .... that backlight problem is probably more a problem for mat to solve though...
I noticed something i hadnt seen b4 on my LCD .... maybe its me but i think its getting black on the right side where the led is ... cant see the led from where i am since its mounted into my comp but i dont think that black patch was there ... still works though
The GLK at present does not have back light intensity capabilities, only on/off. I have an event "SYS->On Finish" "DSP->Backlight Off" which works correctly