I have Lenovo Thinkpad Edge E430(32-bit) laptop. I have installed the 14.04 ubuntu version fresh rather than upgrading from the previous version. I am using this version for around 1 year. The wifi disconnection problem i am encountering from starting(after installing 14.04) itself. The wlan0 info is:
wlan0 IEEE 802.11bgn ESSID:"naruto"
Mode:Managed Frequency:2.437 GHz Access Point: A0:21:B7:8B:A5:70 Bit Rate=72.2 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr=2347 B Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-22 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:48 Missed beacon:0
Network Device Info is given below:
description: Wireless interface
product: RTL8191SEvB Wireless LAN Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 10 serial: f0:7b:cb:9f:11:09 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8192se driverversion=3.13.0-62-generic firmware=N/A ip=10.0.0.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 ioport:2000(size=256) memory:f0500000-f0503fff
Problems: 1) When the system remain connected for ling time to wifi network around more than half an hour/sometimes hour, the wifi signal gets automatically disconnected(No weak signal issue as the wifi router is hardly 1m away and max 2 systems are connected to the router). After disconnection , the system is unable to connect to any wifi signal. The only solution is restart the system.
This problem is occurring very frequently.
2) Whenever i wake up the system from suspend state, the system doesnot able to connect to wifi network. The only solution is restart the system. This issue is always.
NOTE: Above both problems , after restarting the system, the system again connect the wifi signal successfully. But after long use it again disconnected. What to do?