I have identified the commit specific to Dell laptops that broke this and quite coincidentally this same commit was just reverted on the next branch only a few days ago. It's not all good however as the companion commits replace a laptop blacklist with a whitelist meaning it currently only works with Latitude models so I have to see if I can get Precision models also included.
The commit that resulted in this issue was introduced in 3.5 kernel as "dell-laptop: Remove rfkill code"[1] I have built and tested the linux next branch code with the revert commit [2] and then modify the "Latitude" product string commit [3] to "Precision" and the bluetooth LED is now switching off as it should do. [1] https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=a6c2390cd6d2083d27a2359658e08f2d3df375ac [2 ]https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=4cc8a57425c623753b10b77b15392e5b83baa5a3 [3] https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=2a92551845bbbc8421ba908cd14bbdf065e0f454 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Tags removed: needs-bisect -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1254138 Title: Bluetooth LED on Dell laptop permanently on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1254138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
