Kernel 3.13.0-166, -167 and -168 USB bug

[John Travell]

Hi,

Summary: USB keyboard and mouse non responsive at login
Product: Drivers
Version: 2.5
Kernel Version: 3.13.0-166-generic
Kernel Version: 3.13.0-167-generic
Kernel Version: 3.13.0-168-generic

USB keyboard and mouse stop working between 3.13.0-165 and 3.13.0-166
PS2 keyboard works, no PS2 mouse available to test.

First discovered on reboot after kernel update to latest offered by 
distro (3.13.0-167)
Reboot to prior version installed (3.13.0-160) restored functionality. 
All intermediate kernels tried, all versions up to 3.13.0-165 work OK.
3.13.0-166 is first version where USB KB/M non functional, same loss of 
functionality exists in  3.13.0-167 and 3.13.0-168.

Linux Mint 17.3, Intel Core2 Quad Q9450 on Asus P5Q-pro mainboard

How do I isolate more detail to help identify this bug?

Probably low priority as distro versions dependent on kernel 3.* going 
EOL soon.

John Travell