so I'm currently using lubuntu 15.10 on an older dell dimension 4600 pc. after upgrading from 15.04 yesterday the usb wifi adapter that i was using to connect stopped connecting. it will just sit there looking for signal and keep bouncing back with the network password screen. it is currently using kernel 4.2.0-16
i found the usb wifi adapter under "lsusb" command
Bus 001 Device 004: ID 050d:845a Belkin Components F7D2101 802.11n Surf & Share Wireless Adapter v1000 [Realtek RTL8192SU]
Bus 001 Device 002: ID 08e4:013e Pioneer Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 007: ID 046d:c24a Logitech, Inc. G600 Gaming Mouse
Bus 003 Device 003: ID 2516:0011
Bus 003 Device 002: ID 0557:7000 ATEN International Co., Ltd Hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub