On karmic alpha 2 the flickering is the same. The brightness keys are reacting but both keys randomly do nothing (but flickering) or switch with the following behaviour:
Using the "brightness up" key I randomly get the darkest or the almost-brightest setting.
With the "brightness down" key I get the brightest or almost-darkest setting.
The OSD always displays one of those values belonging to the keys, but not necessarily the current one.
After booting I get an error window saying "Internal error - failed to initialize HAL"
On karmic alpha 2 the flickering is the same. The brightness keys are reacting but both keys randomly do nothing (but flickering) or switch with the following behaviour:
Using the "brightness up" key I randomly get the darkest or the almost-brightest setting.
With the "brightness down" key I get the brightest or almost-darkest setting.
The OSD always displays one of those values belonging to the keys, but not necessarily the current one.
After booting I get an error window saying "Internal error - failed to initialize HAL"