wavemon does not work,
iwconfig works fine.
I don't seem to get any results from
wavemon, although it sees the right interface.
If I start wavemon
$ sudo wavemon
it shows for
wlan0 (IEEE 802.11bgn), phy 0, reg: n/a
After the dynamic info update interval, it adds some info on WPA/WPA2:
wlan0 (IEEE 802.11bgn, WPA/WPA2), phy 0, reg: n/a
Also, it sees my
wlan0 (UP RUNNING BROADCAST MULTICAST), mac address, qlen (1000), ip and mtu.
However, in the
Levels panel, it just says
NO INTERFACE DATA
Scan window (
Scan trigger failed on wlan0: No such device
And I have no statistics.
I found this question, but it does not solve my problem for two reasons: 1) I already started wavemon as sudo and 2) I can use
iwconfig just fine. It says:
$ sudo iwconfig wlan0 [sudo] password for mk: wlan0 IEEE 802.11bgn ESSID:"<my essid>" Nickname:"rtl_wifi" Mode:Managed Frequency:2.462 GHz Access Point: 01:23:45:67:89:ab Bit Rate:72 Mb/s Sensitivity:0/0 Retry:off RTS thr:off Fragment thr:off Encryption key:****-****-****-****-****-****-****-**** Security mode:open Power Management:off Link Quality=97/100 Signal level=61/100 Noise level=0/100 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
(ESSID and Access Point censored)
I also read under Dependencies on the github source page README.md something about
CONFIG_CFG80211_WEXT. However, I read somewhere else that also
iwconfig should depend on this. Therefore, I expect it is no solution for me.
I am on Ubuntu 16.04.2 LTS with LXDE and use wavemon 0.8.0 with ncurses 6.0.20160213. The USB WLAN adapter is a
0bda:8172 Realtek Semiconductor Corp. RTL8191SU 802.11n (taken from
lsusb). Its configuration (from
sudo lshw -class network) is
broadcast=yes driver=r8712u ip=192.168.2.100 multicast=yes wireless=IEEE 802.11bgn
After installing wavemon, I have rebooted the system.
dmesg | grep -i firmware I read one related line:
[ 16.880896] usb 1-5: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
The network is managed by NetworkManager v1.2.6.
Happy to provide more info where needed (but where to start?)
What I would ultimately want, is diagnose my situation where WiFi is sometimes fast (at least, reasonable as expected, topping at 10Mb/s) and sometimes VERY slow, often reconnecting. I am two floors up (with one layer of enforced concrete) from the router, a WRT160NL, sending wireless-N only. The antennae are pointer sideways to maximize throughput, as is the antenna of the adapter. I expect the distance to be a possible cause, although iwconfig and
/proc/net/wireless usually report a link quality of 90-100/100 and a signal level of ~70/100. I'd like to look into this a bit further.