cannot adjust brightness E6530 15.04 fresh install

[fINTiP]

Press Fn + up/down arrow.

Expected to happen: brightness goes up or down; notification in top right of brightness going up or down.

Actually happened: brightness stays unaffected; notification does appear and respond correctly, but lies.

Cannot adjust brightness using function key combo. Shows the notification as if I am adjusting it, but screen stays on max brightness. Brightness & Lock app doesn't adjust brightness either.

When I switch to proprietary drivers, brightness adjustment does work. When I turn off the nvidia card and use the intel card, brightness adjustment works. But with the intel card only I don't have hdmi port support, so no triple monitor support. And with the proprietary drivers, I get horrible, horrible bugs, including one that made it impossible to get into my system until I modified bios settings related to the video card.

[fINTiP (lacking-latin)]

After hunting for solutions for hours, I have given up and installed bumblebee. Suggested troubleshooting steps have a higher chance of being attempted if instruction is given on how to switch X to reroute through the nouveau driver (a way to toggle between bumblebee and nouveau).

[penalvch (penalvch)]

fINTiP, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect -p xorg 1472897

Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]