Comment 18 for bug 1315360

So, canonical upgraded the LTS kernel in the package manager from 3.13.0-24 to 3.13.0-27. When I tried building the driver in the -27 kernel, I could not get it to build. Anybody else have this problem? Switched back to the 3.14.1 kernel, it builds/installs with no problems. However, I have noticed a bug with both the 3.14.1 and 3.13.0-27 kernel (with driver installed). If I have my portable HD plugged in at boot, it causes a significant delay before I can use the trackpad (~5mins). And it is buggy when it does start. Leaving the drive unplugged at boot and it works flawlessly.