I'm having a wifi issue on my laptop that I have no idea how to solve.
My laptop runs in dual-boot Windows 8.1/Ubuntu 14.04: whenever I'm using windows, all the connections run with no problem; on ubuntu, instead, wifi connections work for a couple minutes after start-up, and then they stop working until I reboot. Wired connections work fine.
I found this question, probably relevant to my case. Refering to this answer I saw that in my case Power Management:on
, so I tried running sudo iwconfig wlan0 power off
, but I get this error
Error for wireless request "Set Power Management" (8B2C) :
SET failed on device wlan0 ; Operation not supported.
Probably useful infos:
##### lspci #############################
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
Subsystem: Lenovo Device [17aa:b736]
Kernel driver in use: rtl8723be
##### iwconfig ##########################
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry long limit:7 RTS thr=2347 B Fragment thr:off
Power Management:on
Thanks in advance for help!
EDIT: It seems Power Management is not the cause of the problem, as turning it off didn't solve it.
Best Answer
I suspect that power management is not manipulable by iwconfig because the driver has available several parameters related to power saving; from modinfo:
I suggest you try this; from a terminal:
Reboot and test.