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Old 05-16-2017, 11:07 AM   #1
throwaway7850358
LQ Newbie
 
Registered: May 2017
Posts: 2

Rep: Reputation: Disabled
Wireless network discovery defunct


Hello all,

I am having difficulty detecting wireless networks on my Linux system:

Code:
>> iwlist wlo1 scan
wlo1      No scan results
Unfortunately, this has come to the point where I am willing to throw whatever I can at the problem! Please let me know if you have any suggestions at all about how to fix it. I wish that I could reinstall the OS from CD, but (1) GRUB boot manager and BIOS are inaccessible and (2) the OS download is blocked by a firewall at my only wired access point.

Potentially relevant information, together with my attempts to resolve the issue:

Code:
>> sudo apt-get update
>> sudo apt-get upgrade
Code:
>> nmcli dev
DEVICE           TYPE      STATE         CONNECTION         
enxe8802ee78a2e  ethernet  connected     Wired connection 1 
wlo1             wifi      disconnected  --                 
eno1             ethernet  unavailable   --                 
lo               loopback  unmanaged     --
(The commented lines below resulted from a failed attempt to resolve this.)
Code:
>> cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

# Wireless
#auto wlo1
#iface wlo1 inet dhcp
Code:
>> rfkill list all
0: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no
2: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
Code:
>> sudo lshw -C network
  *-network                 
       description: Ethernet interface
       product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eno1
       version: 0a
       serial: 98:e7:f4:58:73:21
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8107e-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:128 ioport:4000(size=256) memory:b1104000-b1104fff memory:b1100000-b1103fff
  *-network
       description: Wireless interface
       product: RTL8723BE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlo1
       version: 00
       serial: 94:e9:79:67:d8:c1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtl8723be driverversion=4.8.0-22-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:19 ioport:3000(size=256) memory:b1000000-b1003fff
  *-network
       description: Ethernet interface
       physical id: 3
       logical name: enxe8802ee78a2e
       serial: e8:80:2e:e7:8a:2e
       size: 100Mbit/s
       capacity: 100Mbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=asix driverversion=22-Dec-2011 duplex=full firmware=ASIX AX88772 USB 2.0 Ethernet ip=170.212.109.235 link=yes multicast=yes port=MII speed=100Mbit/s
Code:
>> ifconfig
eno1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 98:e7:f4:58:73:21  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enxe8802ee78a2e: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 170.212.109.235  netmask 255.255.255.0  broadcast 170.212.109.255
        inet6 fe80::f05c:3c83:cd9:4b0a  prefixlen 64  scopeid 0x20<link>
        ether e8:80:2e:e7:8a:2e  txqueuelen 1000  (Ethernet)
        RX packets 924452  bytes 1049492466 (1.0 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 505956  bytes 40947200 (40.9 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 6326  bytes 779852 (779.8 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6326  bytes 779852 (779.8 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlo1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 94:e9:79:67:d8:c1  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
Code:
>> iwconfig
wlo1      IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          
enxe8802ee78a2e  no wireless extensions.

eno1      no wireless extensions.

lo        no wireless extensions.
Code:
>> sudo ifconfig wlo1 down
>> sudo ifconfig wlo1 up
>> sudo modprobe  -rv rtl8723be && sudo modprobe  -v rtl8723be
rmmod rtl8723be
rmmod rtl_pci
rmmod rtlwifi
rmmod mac80211
rmmod cfg80211
rmmod rtl8723_common
rmmod btcoexist
insmod /lib/modules/4.8.0-22-generic/kernel/net/wireless/cfg80211.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/net/mac80211/mac80211.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtlwifi.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl_pci.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8723com/rtl8723-common.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/btcoexist/btcoexist.ko 
insmod /lib/modules/4.8.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8723be/rtl8723be.ko
Code:
>> lsmod|grep -i wifi
rtlwifi                77824  2 rtl_pci,rtl8723be
mac80211              757760  3 rtl_pci,rtlwifi,rtl8723be
cfg80211              581632  2 mac80211,rtlwifi
Code:
SYSTEM SPECIFICATIONS
------------------------------------------
Kubuntu 16.10
KDE Plasma Version 5.7.5
KDE Frameworks Version: 5.26.0
Qt Version: 5.6.1
Kernel Version: 4.8.0-22-generic
OS Type: 64-bit
 
Old 05-16-2017, 01:55 PM   #2
throwaway7850358
LQ Newbie
 
Registered: May 2017
Posts: 2

Original Poster
Rep: Reputation: Disabled
I've also now attempted the following:

Code:
>> sudo ifconfig wlo1 down
>> sudo ifconfig wlo1 up
>> sudo iwconfig wlo1 essid ${NETWORK_NAME}
>> sudo iwconfig
wlo1      IEEE 802.11  ESSID:"${NETWORK_NAME}"  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Encryption key:off
          Power Management:off
          
enxe8802ee78a2e  no wireless extensions.

eno1      no wireless extensions.

lo        no wireless extensions.
>> sudo dhcpcd wlo1
wlo1: waiting for carrier
timed out
dhcpcd exited
Code:
>> cat /var/log/syslog|grep firmware
May 16 09:13:45 kernel: [    7.674102] [drm] GuC firmware load skipped
May 16 09:13:45 kernel: [   26.507741] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 09:13:48 NetworkManager[854]: <info>  [1494940428.0167] manager[0x55814f5861a0]: monitoring kernel firmware directory '/lib/firmware'.
May 16 10:07:24 kernel: [  233.469257] [drm] GuC firmware load skipped
May 16 10:19:09 NetworkManager[854]: <info>  [1494944349.6289] manager: kernel firmware directory '/lib/firmware' changed
May 16 10:19:14 NetworkManager[854]: <info>  [1494944354.0868] manager: kernel firmware directory '/lib/firmware' changed
May 16 10:34:50 kernel: [    7.948019] [drm] GuC firmware load skipped
May 16 10:34:50 kernel: [   23.710434] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 10:34:55 NetworkManager[904]: <info>  [1494945295.5146] manager[0x55939daae200]: monitoring kernel firmware directory '/lib/firmware'.
May 16 11:25:02 kernel: [    7.565350] [drm] GuC firmware load skipped
May 16 11:25:02 kernel: [   24.761620] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 11:25:04 NetworkManager[991]: <info>  [1494948304.9225] manager[0x55ca427dd200]: monitoring kernel firmware directory '/lib/firmware'.
May 16 11:59:17 kernel: [ 2085.834382] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
Code:
>> cat /var/log/syslog|grep wireless
May 16 09:13:45  kernel: [   26.510598] rtlwifi: rtlwifi: wireless switch is on
May 16 09:15:32  NetworkManager[854]: <info>  [1494940532.8417] device (wlo1): Activation: (wifi) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network '${NETWORK_NAME}'.
May 16 10:07:24  kernel: [  233.460208] rtlwifi: rtlwifi: wireless switch is on
May 16 10:34:50  kernel: [   23.935677] rtlwifi: rtlwifi: wireless switch is on
May 16 10:35:47  ureadahead[318]: ureadahead:ibm-wireless: Ignored relative path
May 16 10:35:47  ureadahead[318]: ureadahead:asus-wireless-off: Ignored relative path
May 16 10:35:47  ureadahead[318]: ureadahead:tosh-wireless: Ignored relative path
May 16 10:35:47  ureadahead[318]: ureadahead:asus-wireless-on: Ignored relative path
May 16 11:25:02  kernel: [   24.766668] rtlwifi: rtlwifi: wireless switch is on
May 16 11:59:17  kernel: [ 2085.836162] rtlwifi: rtlwifi: wireless switch is on
Code:
>> cat /var/log/syslog|grep wifi
May 16 09:13:45  kernel: [   26.507741] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 09:13:45  kernel: [   26.510598] rtlwifi: rtlwifi: wireless switch is on
May 16 09:13:47  NetworkManager[854]: <info>  [1494940427.9566] Read config: /etc/NetworkManager/NetworkManager.conf (etc: default-wifi-powersave-on.conf)
May 16 09:13:48  NetworkManager[854]: <info>  [1494940428.6032] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
May 16 09:15:18  NetworkManager[854]: <info>  [1494940518.4402] device (wlo1): Activation: (wifi) access point '${NETWORK_NAME}' has security, but secrets are required.
May 16 09:15:18  NetworkManager[854]: <info>  [1494940518.4698] device (wlo1): Activation: (wifi) connection '${NETWORK_NAME}' has security, and secrets exist.  No new secrets needed.
May 16 09:15:32  NetworkManager[854]: <info>  [1494940532.8417] device (wlo1): Activation: (wifi) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network '${NETWORK_NAME}'.
May 16 09:16:25  NetworkManager[854]: <info>  [1494940585.2225] device (wlo1): Activation: (wifi) access point '${NETWORK_NAME}' has security, but secrets are required.
May 16 09:16:25  NetworkManager[854]: <info>  [1494940585.2725] device (wlo1): Activation: (wifi) connection '${NETWORK_NAME}' has security, and secrets exist.  No new secrets needed.
May 16 09:16:50  NetworkManager[854]: <warn>  [1494940610.3018] device (wlo1): Activation: (wifi) association took too long, failing activation
May 16 10:07:24  kernel: [  233.460208] rtlwifi: rtlwifi: wireless switch is on
May 16 10:34:50  kernel: [   23.710434] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 10:34:50  kernel: [   23.935677] rtlwifi: rtlwifi: wireless switch is on
May 16 10:34:55  NetworkManager[904]: <info>  [1494945295.4793] Read config: /etc/NetworkManager/NetworkManager.conf (etc: default-wifi-powersave-on.conf)
May 16 10:34:57  NetworkManager[904]: <info>  [1494945297.3658] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
May 16 11:24:16  NetworkManager[904]: <warn>  [1494948256.4090] error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: Authorization check failed: Message recipient disconnected from message bus without replying
May 16 11:24:16  NetworkManager[904]: <warn>  [1494948256.4092] error requesting auth for org.freedesktop.NetworkManager.wifi.share.protected: Authorization check failed: Message recipient disconnected from message bus without replying
May 16 11:25:02  kernel: [   24.761620] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 11:25:02  kernel: [   24.766668] rtlwifi: rtlwifi: wireless switch is on
May 16 11:25:04  NetworkManager[991]: <info>  [1494948304.9085] Read config: /etc/NetworkManager/NetworkManager.conf (etc: default-wifi-powersave-on.conf)
May 16 11:25:05  NetworkManager[991]: <info>  [1494948305.5545] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
May 16 11:59:17  kernel: [ 2085.834382] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
May 16 11:59:17  kernel: [ 2085.836162] rtlwifi: rtlwifi: wireless switch is on
 
Old 05-17-2017, 02:21 PM   #3
fatmac
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Registered: Sep 2011
Location: Upper Hale, Surrey/Hants Border, UK
Posts: 4,216

Rep: Reputation: Disabled
Have you configured the interface?
(This can be done with wicd or ceni.)
 
Old 05-18-2017, 02:46 PM   #4
floppy_stuttgart
Member
 
Registered: Nov 2010
Location: EU mainland
Distribution: Debian like
Posts: 919
Blog Entries: 4

Rep: Reputation: 87
sudo apt-get install linux-headers-generic build-essential git
git clone https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
sudo reboot

like explained here? https://ubuntuforums.org/showthread.php?t=2261702
With google "RTL8723BE PCIe Wireless Network Adapter linux driver", we can see "The RTL8723be is a big pain for Linux users"..
or last post of https://ubuntuforums.org/showthread....304607&page=12
 
  


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