I know that there are already heaps of threads on this subject but I couldn't find anything that worked. I have used ubuntu
12.04 for over a year now and never had any problems with my wireless connection. Recently I wasn't home for 3 weeks and did some updates and installed some software and when I got home my wireless connection didn't work anymore. The connections are shown, but I am not able to connect. I have the following chipset:
$ lspci -vvnn | grep 14e4 0b:00.0 Network controller : Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
What I have done so far:
$ sudo apt-get update && sudo apt-get upgrade
I have followed the documentation on this page https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx
I have tried the wl (the one I also used before I had any problems) and the b43 driver. Always checking that the other is blacklisted. I also checked with
rfkill that everything is enabled.
$ ifconfig eth0 Link encap:Ethernet HWaddr 00:21:9b:f2:4e:5f inet addr:192.168.0.11 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::221:9bff:fef2:4e5f/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:9657 errors:0 dropped:0 overruns:0 frame:0 TX packets:6153 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5626226 (5.6 MB) TX bytes:888364 (888.3 KB) Interrupt:16 eth1 Link encap:Ethernet HWaddr 00:23:4d:c5:5d:bf inet6 addr: fe80::223:4dff:fec5:5dbf/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:55563 TX packets:613 errors:341 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:146488 (146.4 KB) Interrupt:17 Base address:0xc000 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:16436 Metric:1 RX packets:1072 errors:0 dropped:0 overruns:0 frame:0 TX packets:1072 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:120766 (120.7 KB) TX bytes:120766 (120.7 KB)
This is what I get while I trying to connect to my wireless network (at the moment with the b43 driver):
$ iwconfig lo no wireless extensions. eth1 IEEE 802.11abg ESSID:"NUMERICABLE-0D6F" Mode:Managed Frequency:2.462 GHz Access Point: 00:1A:2B:47:5A:96 Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off eth0 no wireless extensions.
I don't know if you need some other information. If so please tell me. I also found some posts in connection with my computer (dell inspirion 1545), but because the wireless was working before, I thought it is probably an other issue.