Thanks for the tip Prakash - I can also confirm the brightness keys now work on my Lenovo G530 with kms enabled using 2.6.34-020634rc6-generic from kernel-ppa. It incorporates the previously mentioned patch from the kernel bugzilla:
Zhang Rui (1):
drm/i915: set DIDL using the ACPI video output device _ADR method return.
Thanks for the tip Prakash - I can also confirm the brightness keys now work on my Lenovo G530 with kms enabled using 2.6.34- 020634rc6- generic from kernel-ppa. It incorporates the previously mentioned patch from the kernel bugzilla:
Zhang Rui (1):
drm/i915: set DIDL using the ACPI video output device _ADR method return.