Just to chime in, I have the same problem on ThinkPad X61 965GM, xorg git Jan 31 2008, Intel 2.2.0, Linux 2.6.24. The backlight comes back on after a resume only if I switch VT or kill the X server. xrandr reports
BACKLIGHT_CONTROL: kernel supported: native legacy combination kernel
I'll be happy to provide any other information if it will help.
Just to chime in, I have the same problem on ThinkPad X61 965GM, xorg git Jan 31 2008, Intel 2.2.0, Linux 2.6.24. The backlight comes back on after a resume only if I switch VT or kill the X server. xrandr reports
BACKLIGHT_CONTROL: kernel
supported: native legacy combination kernel
I'll be happy to provide any other information if it will help.