A major issue I have been experiencing in Fedora 20 in my laptop (Lenovo T530), is the frequent WiFi disconnection. It was very embarrassing, although the WiFi signal strength is good. At times the WiFi goes off and never gets connected back. The following was few useful commands I came to know that can force the WiFi adapter to initiate the connection (possibly). I hope this may be useful to some of you as well.
[shazni@shazniInWSO2 Disk1]$ nmcli -p con ============================================================================================================= List of configured connections ============================================================================================================= NAME UUID TYPE TIMESTAMP-REAL ------------------------------------------------------------------------------------------------------------- TriXNet bd504b18-be5f-4d2d-9ea6-6bff40f29cca 802-11-wireless Mon 08 Sep 2014 01:55:20 PM IST NAUMI LIORA HOTEL dc5a4e03-69f0-4f0b-80a4-b5c6f2755ace 802-11-wireless Thu 21 Aug 2014 10:20:16 PM IST TriXNet_Groud_Floor 6142855d-7845-4f6a-88fb-068b15cbd029 802-11-wireless Thu 14 Aug 2014 11:30:43 PM IST em1 32a2ab29-73af-477a-888c-ab9cf2a489b2 802-3-ethernet never Dialog 4G 3b96c186-012a-43eb-bdb8-72679f318472 802-11-wireless Sun 31 Aug 2014 11:01:30 PM IST PROLiNK_PRN3001 cb54a35f-e459-44cf-a2b3-32071e77460b 802-11-wireless Mon 07 Jul 2014 08:57:24 PM IST ZTE d57d20b1-c556-4706-8849-acafdee1fc88 802-11-wireless Sat 09 Aug 2014 05:50:02 PM IST WSO2 15da72d9-07f9-47bd-9a0a-f055399a6339 802-11-wireless Fri 05 Sep 2014 06:20:15 PM IST AMB 0a521533-22f4-4adc-89c3-8f1b9118743e 802-11-wireless Fri 22 Aug 2014 05:01:37 PM IST [shazni@shazniInWSO2 Disk1]$ nmcli con up uuid bd504b18-be5f-4d2d-9ea6-6bff40f29cca Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/3)The first command shows the available connections together with device UUIDs. The second command initiates the connection given the UUID. This might result in prompting you for a password.
Well I have been doing this for sometime whenever my connection goes off and never re-connects. I found an easy solution ( or rather a workaround ) for frequent disconnection. The workaround was to disable IPv6 in my Linux box. I can't assure the solution would work if you are encountering the same issue. Anyway, that worked for me. Ever since disconnections have been rare.
To disable IPv6 in your machine, do the following.
[shazni@shazniInWSO2 shazni]$ sudo vi /etc/sysctl.conf3) Add the following line at the end of the file (or where its convenient for you):
net.ipv6.conf.all.disable_ipv6 = 1Restart your machine for the changes to take effect.
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