After bisecting the kernel releases I have determined when this bug was injected. Release 4.4.39 is OK Release 4.5-rc1 is BROKEN
64-bit Generic versions were used. After testing many releases I have discovered one additional aspect of this bug of the backlight inappropriately coming on following the exiting of the screen saver. In the broken kernels the backlight will illuminate during the "traveling dots" while the desktop GUI is starting. It remains on until manually disabled or when the screen saver exits. ** Tags added: kernel-bug-exists-upstream-4.5-rc1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1645985 Title: ubuntu 1404_HWE_EOL kernel breaks Thinkpad T530 keyboard backlight operation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1645985/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
