Yesterday I installed the compat driver to get my RealTek wireless card working. Everyting was fine until I rebooted my laptop this morning. And no wireless connections show up in Network Manager.
lshw -C network looks good
*-network description: Wireless interface product: RTL8723AE PCIe Wireless Network Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 00 serial: 48:d2:24:28:70:4d width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8723ae driverversion=3.2.0-54-generic firmware=N/A latency=0 multicast=yes wireless=IEEE 802.11bgn resources: irq:18 ioport:d000(size=256) memory:f7900000-f7903fff *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0.2 bus info: pci@0000:04:00.2 logical name: eth0 version: 0a serial: 00:90:f5:ea:e4:59 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.037.00-NAPI duplex=half latency=0 multicast=yes port=twisted pair speed=100Mbit/s resources: irq:42 ioport:c000(size=256) memory:f2104000-f2104fff memory:f2100000-f2103fff
iwconfig is fine as well
wlan0 IEEE 802.11bgn ESSID:off/any Mode:Ad-Hoc Frequency:2.412 GHz Cell: 76:F6:73:EB:45:1E Tx-Power=20 dBm Retry long limit:7 RTS thr=2347 B Fragment thr:off Power Management:off
I wouldn't have posted here if Google-ing had solved my problem. Things I have tried
service network-manager restart ifconfig wlan0 up /ect/init.d/networking restart gedit /etc/NetworkManager/NetworkManager.conf and set managed=false to true gedit /etc/network/interfaces and everything looks good ( I didn't change it, just checked that wlan0 is not listed there) rmmod rtl8723ae modprobe rtl8723ae
But nothing works.
I guess something was turned on during driver installation, but the system failed to turn it on again during booting. Can anyone help me? Or else I have to live in a world without internet connection(maybe better, huh?).
Some log message
$ dmesg | grep -i rtl [ 18.775375] rtl8723ae 0000:03:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 18.775384] rtl8723ae 0000:03:00.0: setting latency timer to 64 [ 18.790268] rtl8723ae: Using firmware rtlwifi/rtl8723fw_B.bin [ 19.079022] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' [ 19.079268] rtlwifi: wireless switch is on
iwlist scan says that no wireless connection is found. nmcli dev and nmcli dev wifi list give similar results ( the device is OK, but no connections found).
This is the first time I post on askubuntu, and I feel really glad to receive help from chili555 and Ramchandra Apte. But let me finish my story first.
I reboot my system to Windows 8 to make sure that the wireless card is OK. After that, I switch to Ubuntu, and run iwlist scan, and feel really surprised to see tons of output coming from the terminal. Now everything works out of the box again!
I remembered that when I was trying to suspend my laptop the night I installed the compat driver for the first time, it took longer than usual, so I long-pressed the power button. Since then, the laptop would fail to recover if I closed its lid to suspend it. And the wireless stopped working the morning after that.
So the real problem may have little to do with the wireless driver. I guess an internal switch in the hardware was toggled during halting, so the card ceased to scan for connections. However, the Windows driver is clever (or lucky) enough to re-enable the card, and things work out.
I cannot reproduce the problem now so some of the logs are incomplete. However, the problem is fixed anyway. And I witnessed a sharp increase in my productivity during the nights when my laptop could not connect to wifi.
Thank you for your time. Really appreciate your help.