Thanks for the bug report. This particular bug has already been reported, but feel free to report any other bugs you find.
** This bug has been marked a duplicate of bug 71368 Laptop backlight stays always on -- [nv11] DPMS not switching off laptop backlight https://launchpad.net/bugs/37540 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
