Experiencing the same issue here:
ThinkPad T450s Ubuntu 15.04 Linux philbuntu 3.19.0-30-generic #34-Ubuntu SMP Fri Oct 2 22:08:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I have not experienced the system freezes though.
Experiencing the same issue here:
ThinkPad T450s
Ubuntu 15.04
Linux philbuntu 3.19.0-30-generic #34-Ubuntu SMP Fri Oct 2 22:08:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I have not experienced the system freezes though.