1. Apparently, I was wrong about the STA driver; it has the same problem, but it was never patched up
2. For your 14.04 build, you're using the older 3.13 line of kernels:
Building for 3.13.0-68-generic and 3.13.0-71-generic
I believe the later "point" releases (e.g., 14.04.3) are using a newer line of kernels, for newer hardware support [1]. See this bug, where the user has kernel 3.19.0-33:
Iain,
1. Apparently, I was wrong about the STA driver; it has the same problem, but it was never patched up
2. For your 14.04 build, you're using the older 3.13 line of kernels:
Building for 3.13.0-68-generic and 3.13.0-71-generic
I believe the later "point" releases (e.g., 14.04.3) are using a newer line of kernels, for newer hardware support [1]. See this bug, where the user has kernel 3.19.0-33:
https:/ /bugs.launchpad .net/ubuntu/ +source/ broadcom- sta/+bug/ 1522548
So this is still a valid bug.
[1] https:/ /wiki.ubuntu. com/Kernel/ LTSEnablementSt ack