b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found -> BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev 02) not working in Ubuntu 9.04

Please first connect your network card to the wireless router using an ethernet cable (also known as a LAN cable).

In order to gather essential troubleshooting information about your wireless card, please follow this procedure:

Step 1: Open Terminal from "Applications->Accessories->Terminal"

Step 2: Run the following command. The command STARTS with the word sudo and ENDS with the word restart. So please copy-paste the ENTIRE command below into a Terminal, press enter, then enter password when sudo asks for password, then press enter again.

sudo lshw -C network; sudo iwlist scanning; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nn; lsusb; uname -a; dmesg | grep ound; dmesg | grep b43; dmesg | grep iwl; iwconfig; sudo /etc/init.d/networking restart

Step 3: Please post results (copy/paste terminal output) on this thread

Thank you

 *-network
       description: Ethernet interface
       product: 88E8036 PCI-E Fast Ethernet Controller
       vendor: Marvell Technology Group Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: eth0
       version: 10
       serial: 00:e0:b8:8f:80:fa
       capacity: 100MB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.22 firmware=N/A latency=0 link=no module=sky2 multicast=yes port=twisted pair
  *-network
       description: Network controller
       product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller
       vendor: Broadcom Corporation
       physical id: 2
       bus info: pci@0000:05:02.0
       version: 02
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master
       configuration: driver=b43-pci-bridge latency=64 module=ssb
  *-network:0 DISABLED
       description: Wireless interface
       physical id: 1
       logical name: wlan0
       serial: 00:14:a5:89:20:86
       capabilities: ethernet physical wireless
       configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg
  *-network:1 DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: pan0
       serial: 1e:1b:61:cb:e2:bc
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes
bash: sudi: command not found
bash: cat/etc/network/interfaces,: No such file or directory
00:00.0 Host bridge [0600]: ATI Technologies Inc RS480 Host Bridge [1002:5950] (rev 10)
00:01.0 PCI bridge [0604]: ATI Technologies Inc RS480 PCI Bridge [1002:5a3f]
00:06.0 PCI bridge [0604]: ATI Technologies Inc RS480 PCI Bridge [1002:5a38]
00:13.0 USB Controller [0c03]: ATI Technologies Inc IXP SB400 USB Host Controller [1002:4374]
00:13.1 USB Controller [0c03]: ATI Technologies Inc IXP SB400 USB Host Controller [1002:4375]
00:13.2 USB Controller [0c03]: ATI Technologies Inc IXP SB400 USB2 Host Controller [1002:4373]
00:14.0 SMBus [0c05]: ATI Technologies Inc IXP SB400 SMBus Controller [1002:4372] (rev 11)
00:14.1 IDE interface [0101]: ATI Technologies Inc IXP SB400 IDE Controller [1002:4376]
00:14.3 ISA bridge [0601]: ATI Technologies Inc IXP SB400 PCI-ISA Bridge [1002:4377]
00:14.4 PCI bridge [0604]: ATI Technologies Inc IXP SB400 PCI-PCI Bridge [1002:4371]
00:14.5 Multimedia audio controller [0401]: ATI Technologies Inc IXP SB400 AC'97 Audio Controller [1002:4370] (rev 02)
00:14.6 Modem [0703]: ATI Technologies Inc SB400 AC'97 Modem Controller [1002:4378] (rev 02)
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration [1022:1100]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map [1022:1101]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller [1022:1102]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control [1022:1103]
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon XPRESS 200M 5955 (PCIE) [1002:5955]
03:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8036 PCI-E Fast Ethernet Controller [11ab:4351] (rev 10)
05:02.0 Network controller [0280]: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev 02)
05:09.0 CardBus bridge [0607]: Texas Instruments PCIxx21/x515 Cardbus Controller [104c:8031]
05:09.2 FireWire (IEEE 1394) [0c00]: Texas Instruments OHCI Compliant IEEE 1394 Host Controller [104c:8032]
05:09.3 Mass storage controller [0180]: Texas Instruments PCIxx21 Integrated FlashMedia Controller [104c:8033]
05:09.4 SD Host controller [0805]: Texas Instruments PCI6411/6421/6611/6621/7411/7421/7611/7621 Secure Digital Controller [104c:8034]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Linux jj-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux
[ 0.000000] found SMP MP-table at [c00f8220] 000f8220
[ 0.517477] ACPI: No dock devices found.
[ 0.526717] pnp: PnP ACPI: found 10 devices
[ 1.880163] pcieport-driver 0000:00:06.0: found MSI capability
[ 2.266083] isapnp: No Plug & Play device found
[ 2.724103] hub 1-0:1.0: USB hub found
[ 2.784080] hub 2-0:1.0: USB hub found
[ 2.844073] hub 3-0:1.0: USB hub found
[ 2.846685] device-mapper: multipath round-robin: version 1.0.0 loaded
[ 2.848351] powernow-k8: Found 1 AMD Turion(tm) 64 Mobile Technology ML-32 processors (1 cpu cores) (version 2.20.00)
[ 2.848767] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[ 3.432135] ssb: Sonics Silicon Backplane found on PCI device 0000:05:02.0
[ 10.961720] sdhci-pci 0000:05:09.4: SDHCI controller found [104c:8034] (rev 0)
[ 11.074718] yenta_cardbus 0000:05:09.0: CardBus bridge found [107b:0300]
[ 11.423304] b43-phy0: Broadcom 4318 WLAN found
[ 11.891003] lp: driver loaded but no devices found
[ 21.522859] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found
[ 21.586561] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found
bash: dmeg: command not found
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:""
          Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
          Tx-Power=20 dBm
          Retry min limit:7 RTS thr:off Fragment thr=2352 B
          Power Management:off
          Link Quality:0 Signal level:0 Noise level:0
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

pan0 no wireless extensions.

bash: sudo/etc/init.d/networking: No such file or directory
jj@jj-laptop:~$

Please try this solution:

https://answers.launchpad.net/ubuntu/+question/79841