description: Wireless interface product: BCM4312 802.11b/g LP-PHY I am no expert but I am pretty sure you need to install --fwcutter is a tool which can extract firmware from various source files. It's written for BCM43xx driver files which is available in the Ubuntu Software Center. tab <div class="gmail_quote">On Fri, Nov 25, 2011 at 18:17, Peng Yu <<a href="mailto:pengyu.ut@gmail.com">pengyu.ut@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On Fri, Nov 25, 2011 at 6:03 PM, Peng Yu <<a href="mailto:pengyu.ut@gmail.com">pengyu.ut@gmail.com</a>> wrote: > Hi, > > I installed ubuntu 11.10 on Dell Vostro 1520. When I click on the up > and down arrows on the top bar, I see "Enable Wireless" menu item is > gray. Is it because the wireless network card is not properly > recognized by ubuntu? Does anybody know how to fix the problem? </div>I have the following output of these commands. ~$ sudo lshw -C network *-network description: Ethernet interface product: RTL8111/8168B PCI Express Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:08:00.0 logical name: eth0 version: 03 serial: 00:24:e8:9c:24:44 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168d-1.fw ip=192.168.1.116 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:47 ioport:4000(size=256) memory:fe004000-fe004fff memory:fe000000-fe003fff memory:fe020000-fe03ffff *-network DISABLED description: Wireless interface product: BCM4312 802.11b/g LP-PHY vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:0e:00.0 logical name: eth2 version: 01 serial: 00:24:2c:a1:1a:30 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 latency=0 multicast=yes wireless=IEEE 802.11bg resources: irq:18 memory:f6000000-f6003fff ~$ iwconfig lo no wireless extensions. eth0 no wireless extensions. eth2 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:0 Noise level:0 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 <div class="HOEnZb"><div class="h5"> -- Regards, Peng -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </div></div></blockquote></div>