Wifi connects for 30 secs - 1 min but then disconnects and firefox doesn't load

[rob138]

I have recently formatted and reinstalled ubuntu 14.04 on my computer hoping to fix a problem I've been having with my wifi. Wifi had been working fine previously but I tried to install open office and the drivers for my printer and they seem to have messed it up. I've read lots of people's posts with a similar problem copying and pasting commands in the terminal but nothing has worked. I would be very grateful for any help.

Here is ifconfig and iw config info

eth0 Link encap:Ethernet HWaddr 74:d4:35:d4:77:a8
inet addr:192.168.1.34 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::76d4:35ff:fed4:77a8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:31585 errors:0 dropped:0 overruns:0 frame:0
TX packets:20593 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:21628899 (21.6 MB) TX bytes:4518522 (4.5 MB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:5926 errors:0 dropped:0 overruns:0 frame:0
TX packets:5926 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:564766 (564.7 KB) TX bytes:564766 (564.7 KB)

wlan0 Link encap:Ethernet HWaddr 30:b5:c2:1d:3b:d1
inet addr:192.168.1.35 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::32b5:c2ff:fe1d:3bd1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9221 errors:0 dropped:0 overruns:0 frame:0
TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:487379 (487.3 KB) TX bytes:12464 (12.4 KB)


eth0 no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:"MOVISTAR_A290"
Mode:Managed Frequency:2.437 GHz Access Point: B2:46:FC:77:A2:90
Bit Rate=72.2 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thrff
Power Managementff
Link Quality=70/70 Signal level=-27 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:68 Missed beacon:0

lo no wireless extensions.

[Pilot6]

Please give output of

lspci -knn | grep Net -A2

[rob138]

it doesn't give any output info:
rob@rob-H81M-D2V:~$ lspci -knn | grep Net -A2
rob@rob-H81M-D2V:~$ lspci -knn | grep Net -A2
rob@rob-H81M-D2V:~$ sudo lspci -knn | grep Net -A2
rob@rob-H81M-D2V:~$


I have attached the wireless-info.tar doc

[rob138]

wireless-info.txt