My wireless connection keeps randomly disconnecting. Sometimes it connects back after few seconds, and sometimes not.
Sometimes I have to run
sudo service network-manager restart, otherwise it won't reconnect until system reboot.
I've faced this problem on both Ubuntu 14.04.3 and Ubuntu 15.04.
The following is a result from
iwconfig, my WiFi card is: Ralink RT5390.
IEEE 802.11bgn ESSID:"BTHub5-J27X" Mode:Managed Frequency:2.412 GHz Access Point: 00:84:B0:EB:E5:E8 Bit Rate=65 Mb/s Tx-Power=20 dBm Retry short limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=65/70 Signal level=-45 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:32 Invalid misc:60 Missed beacon:0 uname -r 3.19.0-28-generic lspci 03:00.0 Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe lspci -knn | grep Net -A2 03:00.0 Network controller : Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe [1814:5390] Subsystem: AzureWave Device [1a3b:1155] Kernel driver in use: rt2800pci
Furthermore, the connection on my Android device is stable.
Your help is very appreciated.