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[ubuntu] wireless problem!!

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http://ubuntuforums.org – hi, today I was just install ubuntu 9.10 and I've got problem with wireless. I read other topic but I couldn't fix problem some information: iwconfig: Code: 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=0 dBm            Retry  long limit:7  RTS thr:off  Fragment thr:off           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. ifconfig: Code: eth0      Link encap:Ethernet  HWaddr 00:1e:c9:01:e9:a3            inet addr:192.168.1.101  Bcast:192.168.1.255  Mask:255.255.255.0           inet6 addr: fe80::21e:c9ff:fe01:e9a3/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:2484 errors:0 dropped:0 overruns:0 frame:0           TX packets:2621 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000           RX bytes:2538467 (2.5 MB)  TX bytes:395388 (395.3 KB)           Interrupt:17 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:4 errors:0 dropped:0 overruns:0 frame:0           TX packets:4 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0           RX bytes:240 (240.0 B)  TX bytes:240 (240.0 B) sudo lshw -C network: Code:   *-network                    description: Network controller       product: BCM4311 802.11b/g WLAN       vendor: Broadcom Corporation       physical id: 0       bus info: pci@0000:0c:00.0       version: 01       width: 32 bits       clock: 33MHz       capabilities: pm msi pciexpress bus_master cap_list       configuration: driver=b43-pci-bridge latency=0       resources: irq:17 memory:fe8fc000-fe8fffff   *-network       description: Ethernet interface       product: NetLink BCM5906M Fast Ethernet PCI Express       vendor: Broadcom Corporation       physical id: 0       bus info: pci@0000:09:00.0       logical name: eth0       version: 02       serial: 00:1e:c9:01:e9:a3       size: 100MB/s       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=tg3 driverversion=3.99 duplex=full firmware=sb v3.04 ip=192.168.1.101 latency=0 link=yes multicast=yes port=twisted pair speed=100MB/s       resources: irq:30 memory:fe5f0000-fe5fffff   *-network DISABLED       description: Wireless interface       physical id: 2       logical name: wlan0       serial: 00:1f:3a:28:97:89       capabilities: ethernet physical wireless       configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg lspci: Code: 00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c) 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) 00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 02) 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 02) 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 02) 00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 02) 00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 02) 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f2) 00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 02) 03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05) 03:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22) 03:01.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12) 03:01.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12) 09:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express (rev 02) 0c:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) lsusb: Code: Bus 003 Device 005: ID 0a5c:4503 Broadcom Corp. Bus 003 Device 004: ID 0a5c:4502 Broadcom Corp. Bus 003 Device 003: ID 413c:8126 Dell Computer Corp. Wireless 355 Bluetooth Bus 003 Device 002: ID 0a5c:4500 Broadcom Corp. Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 05a9:2640 OmniVision Technologies, Inc. OV2640 Webcam Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub lsmod: Code: Module                  Size  Used by binfmt_misc            8356  1 bridge                47952  0 stp                    2272  1 bridge bnep                  12060  2 ppdev                  6688  0 snd_hda_codec_idt      59844  1 snd_hda_intel          26920  2 snd_hda_codec          75708  2 snd_hda_codec_idt,snd_hda_intel arc4                    1660  2 ecb                    2524  2 snd_hwdep              7200  1 snd_hda_codec snd_pcm_oss            37920  0 snd_mixer_oss          16028  1 snd_pcm_oss b43                  122136  0 snd_pcm                75296  3 snd_hda_intel,snd_hda_codec,snd_pcm_oss snd_seq_dummy          2656  0 snd_seq_oss            28576  0 snd_seq_midi            6432  0 snd_rawmidi            22208  1 snd_seq_midi snd_seq_midi_event      6940  2 snd_seq_oss,snd_seq_midi snd_seq                50224  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event snd_timer              22276  2 snd_pcm,snd_seq uvcvideo              59080  0 joydev                10272  0 snd_seq_device          6920  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq mac80211              181236  1 b43 videodev              36736  1 uvcvideo dell_wmi                2564  0 iptable_filter          3100  0 v4l1_compat            14496  2 uvcvideo,videodev sdhci_pci              7100  0 snd                    59204  16 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore              7264  1 snd ip_tables              11692  1 iptable_filter sdhci                  17472  1 sdhci_pci dell_laptop            8128  0 btusb                  11856  2 lp                      8964  0 parport                35340  2 ppdev,lp cfg80211              93052  2 b43,mac80211 snd_page_alloc          9156  2 snd_hda_intel,snd_pcm psmouse                56180  0 x_tables              16544  1 ip_tables serio_raw              5280  0 dcdbas                  7292  1 dell_laptop led_class              4096  2 b43,sdhci usbhid                38208  0 fbcon                  36640  72 tileblit                2460  1 fbcon font                    8124  1 fbcon bitblit                5372  1 fbcon softcursor              1756  1 bitblit ohci1394              29900  0 ieee1394              86596  1 ohci1394 tg3                  109600  0 ssb                    35300  1 b43 i915                  221064  3 drm                  159584  3 i915 i2c_algo_bit            5760  1 i915 intel_agp              27484  2 i915 agpgart                34988  2 drm,intel_agp video                  19380  1 i915 output                  2780  1 video P.S. I installed ubuntu on Dell vostro 1400 laptop (HowTos)