The built in wireless on teh Dell Inspiron 9300 suddenly stopped working. Having poked around a bit with wicd and network-manager (not simultaneously), I am checkinh whether the problem is sudden hardware failure. I plugged in a USB network card.
Here is what I get: sarah@debian-wheezy:~$ lsusb Bus 001 Device 003: ID 0b05:17ab ASUSTek Computer, Inc. USB-N13 802.11n Network Adapter (rev. B1) [Realtek RTL8192CU] Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 003: ID 1c4f:0003 SiGma Micro HID controller Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 1631:5002 Good Way Technology Bus 002 Device 002: ID 1631:5400 Good Way Technology Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub sarah@debian-wheezy:~$ sarah@debian-wheezy:~$ grep wifi /proc/modules rtlwifi 45511 2 rtl8192cu,rtl_usb, Live 0xf829b000 mac80211 425575 3 rtl8192cu,rtl_usb,rtlwifi, Live 0xf8a02000 cfg80211 350041 4 rtlwifi,mac80211,ipw2200,libipw, Live 0xf8313000 sarah@debian-wheezy:~$ But: sarah@debian-wheezy:~$ /sbin/ifconfig -a eth0 Link encap:Ethernet HWaddr 00:14:22:e7:6f:21 inet addr:192.168.0.9 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::214:22ff:fee7:6f21/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:679 errors:0 dropped:3 overruns:0 frame:0 TX packets:522 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:100380 (98.0 KiB) TX bytes:72694 (70.9 KiB) Interrupt:18 eth1 Link encap:Ethernet HWaddr 00:16:6f:00:3a:b3 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:7 errors:17 dropped:17 overruns:0 frame:0 TX packets:79 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:945 (945.0 B) TX bytes:14187 (13.8 KiB) 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:84 errors:0 dropped:0 overruns:0 frame:0 TX packets:84 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:22493 (21.9 KiB) TX bytes:22493 (21.9 KiB) sarah@debian-wheezy:~$ Where eth1 is the on-board card. Where next? With the on-board wifi card, I have tried DHCP and static IP. It reports failure at the authentication stage. I have checked and rechecked both the MAC address on the router and the passphrase entered in the laptop. Both are fine. As I say, it failed suddenly, at the client's house, and she does not use MAC address identification. The wireless worked immediately after the upgrade. I have tried Fn-F2. As I say, where next. I have no objection to e/n/i, in fcat I prefer it, but this is a laptop. It must be able to roam. So I have no idea where to start! Lisi