After installation of NVIDIA drivers (331.38) through Driver Manager on Ubuntu 14.04, after a while usb mouse stops working without any success of reconnecting it (only reboot helps). When falling back to nouveau everything works properly. I couldn't find anything related to this problem in here or anywhere else.
Bus 002 Device 002: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 04f3:0103 Elan Microelectronics Corp. ActiveJet K-2024 Multimedia Keyboard
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 004: ID 04d9:fa50 Holtek Semiconductor, Inc.
Bus 003 Device 003: ID 1b1c:0a03 Corsair
Bus 003 Device 002: ID 2687:fb01
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub