I am new to Linux, so please spell out potential solutions. I have installed Ubuntu 11.10 as a dual boot on my Dell Inspiron 6400 laptop. My internet download speed is usually .5MB, after I shut down my internet using $ sudo /etc/init.d/networking stop which gives me errors, and oddly enough makes all my icons change, as well as greying out all open programs, and makes my logoff menu disappear BUT, when I pull the battery out, and reboot, internet goes up to about 7MB download for a while. Also, when my internet slows, ALL audio becomes garbled.. By all I mean I can close all open programs, put in an audio CD, and the music is garbled, not internet related at all. When I reboot, with faster internet, my audio works just fine as well, CDs, internet sites, system sounds etc.

When I run the script on the sticky to this forum I get 2 messages:
lo no wireless extensions.

eth0 no wireless extensions.

With doing a few things here is what I get:

Code:
 bjrohan_bjrohan-MM061:~$ lspci -nnk | grep -iA2 net
03:00.0 Ethernet controller [0200]: Broadcom Corporation BCM4401-B0 100Base-TX [14e4:170c] (rev 02)
	Subsystem: Dell Inspiron 6400 [1028:01af]
	Kernel driver in use: b44
--
0b:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (rev 02)
	Subsystem: Intel Corporation Device [8086:1020]
	Kernel driver in use: iwl3945
bjrohan_bjrohan-MM061:~$ lspci -nnk | grep -iA2 net
03:00.0 Ethernet controller [0200]: Broadcom Corporation BCM4401-B0 100Base-TX [14e4:170c] (rev 02)
	Subsystem: Dell Inspiron 6400 [1028:01af]
	Kernel driver in use: b44
--
0b:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (rev 02)
	Subsystem: Intel Corporation Device [8086:1020]
	Kernel driver in use: iwl3945


bjrohan_bjrohan-MM061:~$ lsmod
Module                  Size  Used by
nls_iso8859_1          12617  0 
nls_cp437              12751  0 
vfat                   17308  0 
fat                    55577  1 vfat
usb_storage            44173  0 
uas                    17699  0 
bnep                   17923  2 
rfcomm                 38408  8 
parport_pc             32114  0 
ppdev                  12849  0 
binfmt_misc            17292  1 
joydev                 17393  0 
dell_wmi               12601  0 
sparse_keymap          13658  1 dell_wmi
usbhid                 41905  0 
hid                    77367  1 usbhid
dell_laptop            13519  0 
dcdbas                 14098  1 dell_laptop
snd_hda_codec_idt      60049  1 
arc4                   12473  2 
iwl3945                73360  0 
iwl_legacy             71499  1 iwl3945
btusb                  18160  2 
mac80211              393459  2 iwl3945,iwl_legacy
snd_hda_intel          24262  1 
snd_hda_codec          91754  2 snd_hda_codec_idt,snd_hda_intel
psmouse                73673  0 
snd_hwdep              13276  1 snd_hda_codec
r852                   17901  0 
sm_common              16737  1 r852
nand                   49707  2 r852,sm_common
nand_ids                8547  1 nand
nand_bch               13003  1 nand
bch                    21757  1 nand_bch
nand_ecc               13070  1 nand
bluetooth             148839  23 bnep,rfcomm,btusb
serio_raw              12990  0 
mtd                    35852  2 sm_common,nand
snd_pcm                80468  2 snd_hda_intel,snd_hda_codec
radeon                925094  3 
snd_seq_midi           13132  0 
snd_rawmidi            25241  1 snd_seq_midi
snd_seq_midi_event     14475  1 snd_seq_midi
snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event
snd_timer              28932  2 snd_pcm,snd_seq
snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
snd                    55902  11 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
video                  18908  0 
cfg80211              172392  3 iwl3945,iwl_legacy,mac80211
ttm                    65224  1 radeon
drm_kms_helper         32889  1 radeon
drm                   192226  5 radeon,ttm,drm_kms_helper
wmi                    18744  1 dell_wmi
i2c_algo_bit           13199  1 radeon
soundcore              12600  1 snd
snd_page_alloc         14115  2 snd_hda_intel,snd_pcm
lp                     17455  0 
parport                40930  3 parport_pc,ppdev,lp
sdhci_pci              13658  0 
sdhci                  27360  1 sdhci_pci
firewire_ohci          35854  0 
b44                    31443  0 
firewire_core          56937  1 firewire_ohci
crc_itu_t              12627  1 firewire_core
ssb                    50682  1 b44

and:

Code:
bjrohan_bjrohan-MM061:~$ dmesg | grep iwl
[   23.637248] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[   23.637252] iwl3945: Copyright(c) 2003-2011 Intel Corporation
[   23.637335] iwl3945 0000:0b:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[   23.637352] iwl3945 0000:0b:00.0: setting latency timer to 64
[   23.694714] iwl3945 0000:0b:00.0: Tunable channels: 11 802.11bg, 13 802.11a channels
[   23.694719] iwl3945 0000:0b:00.0: Detected Intel Wireless WiFi Link 3945ABG
[   23.694875] iwl3945 0000:0b:00.0: irq 43 for MSI/MSI-X
[   23.724198] ieee80211 phy0: Selected rate control algorithm 'iwl-3945-rs'
[   25.563140] iwl3945 0000:0b:00.0: loaded firmware version 15.32.2.9
and:

Code:
  bjrohan_bjrohan-MM061:~$ sudo iwlist scan
[sudo] password for bjrohan: 
lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wlan0     Scan completed :
          Cell 01 - Address: 00:24:B2:D7:46:2E
                    Channel:2
                    Frequency:2.417 GHz (Channel 2)
                    Quality=31/70  Signal level=-79 dBm  
                    Encryption key:on
                    ESSID:"clarkg"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000054e99ad80
                    Extra: Last beacon: 192ms ago
                    IE: Unknown: 0006636C61726B67
                    IE: Unknown: 010882848B968C129824
                    IE: Unknown: 030102
                    IE: Unknown: 0706555320010B1B
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2A0100
                    IE: Unknown: 3204B048606C
                    IE: Unknown: DD180050F2020101820003A4000027A4000042435E0062322F00
                    IE: Unknown: DD1E00904C334E111BFF00000000000000000000000000000000000000000000
                    IE: Unknown: 2D1A4E111BFF00000000000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C34020D0800000000000000000000000000000000000000
                    IE: Unknown: 3D16020D0800000000000000000000000000000000000000
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: Unknown: DD0A00037F04010002004000
                    IE: Unknown: DD8E0050F204104A0001101044000102103B00010310470010000000000000100000000024B2D7462E1021000D4E6574676561722C20496E632E10230009574E523130303076321024000456324831104200046E6F6E651054000800060050F20400011011001E574E523130303076322D564328576972656C6573732041502D322E344729100800020086103C000103
          Cell 02 - Address: 00:21:29:9C:D4:9D
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=59/70  Signal level=-51 dBm  
                    Encryption key:on
                    ESSID:"\x00\x00\x00\x00\x00"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000001507ca0183
                    Extra: Last beacon: 184ms ago
                    IE: Unknown: 00050000000000
                    IE: Unknown: 010882848B9624B0486C
                    IE: Unknown: 030101
                    IE: Unknown: 050400010000
                    IE: Unknown: 2A0102
                    IE: Unknown: 2F0102
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32048C129860
                    IE: Unknown: DD090010180203F0000000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 03 - Address: 00:00:00:00:00:00
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=53/70  Signal level=-57 dBm  
                    Encryption key:on
                    ESSID:""
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000280139228a
                    Extra: Last beacon: 3132ms ago
                    IE: Unknown: 0000
                    IE: Unknown: 010482848B96
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 32080C1218243048606C
          Cell 04 - Address: 00:24:7B:7D:A7:8E
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=53/70  Signal level=-57 dBm  
                    Encryption key:on
                    ESSID:"myqwest4893"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000002801380bab
                    Extra: Last beacon: 3140ms ago
                    IE: Unknown: 000B6D79717765737434383933
                    IE: Unknown: 010482848B96
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32080C1218243048606C
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD7A0050F204104A0001101044000102103B0001031047001025B47828692C7534F5F9603C87445CD7102100025449102300064150444B3731102400043731303010420007313233343332311054000800060050F20400011011001A416374696F6E7465632052656769737472617220504B3530303010080002008C
          Cell 05 - Address: 20:4E:7F:9B:15:80
                    Channel:7
                    Frequency:2.442 GHz (Channel 7)
                    Quality=40/70  Signal level=-70 dBm  
                    Encryption key:on
                    ESSID:"NETGEAR17"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000010511402e79
                    Extra: Last beacon: 3236ms ago
                    IE: Unknown: 00094E4554474541523137
                    IE: Unknown: 010882840B162430486C
                    IE: Unknown: 030107
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: 2D1AFC181FFFFF000001000000000000000000000000000000000000
                    IE: Unknown: 3D1607001300000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F0101
                    IE: Unknown: DD7F0050F204104A0001101044000102103B00010310470010CAD19D3159FB3E35FD75AB3971C0800C1021000D4E4554474541522C20496E632E1023000A574E44523334303076321024000A574E44523334303076321042000230311054000800060050F20400011011000A574E4452333430307632100800020004103C000103
                    IE: Unknown: DD090010180203F0040000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 06 - Address: 00:21:29:9C:D4:9D
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=61/70  Signal level=-49 dBm  
                    Encryption key:on
                    ESSID:"Rohan"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000001506bdfe12
                    Extra: Last beacon: 17748ms ago
                    IE: Unknown: 0005526F68616E
                    IE: Unknown: 010882848B9624B0486C
                    IE: Unknown: 030101
                    IE: Unknown: 2A0102
                    IE: Unknown: 2F0102
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32048C129860
                    IE: Unknown: DD090010180203F0000000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 07 - Address: 00:1A:70:E4:AA:51
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=25/70  Signal level=-85 dBm  
                    Encryption key:on
                    ESSID:"DaBears"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000006ac880b1
                    Extra: Last beacon: 3724ms ago
                    IE: Unknown: 000744614265617273
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: DD090010180202F4000000
          Cell 08 - Address: 00:18:39:4B:01:BE
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=22/70  Signal level=-88 dBm  
                    Encryption key:off
                    ESSID:"linksys"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000006a21547185
                    Extra: Last beacon: 3704ms ago
                    IE: Unknown: 00076C696E6B737973
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: Unknown: 32040C121860
                    IE: Unknown: DD06001018020014
          Cell 09 - Address: AC:81:12:56:2D:E0
                    Channel:9
                    Frequency:2.452 GHz (Channel 9)
                    Quality=26/70  Signal level=-84 dBm  
                    Encryption key:on
                    ESSID:"WiFiRSU_7e"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=00000615665dcddc
                    Extra: Last beacon: 3196ms ago
                    IE: Unknown: 000A576946695253555F3765
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 030109
                    IE: Unknown: 2A0102
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A6E1017FF00000001000000000000000000000000000000000000
                    IE: Unknown: 3D1609000000000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101030003A4000027A4000042435E0062322F00
                    IE: Unknown: 0B0500000B127A
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4300000000
                    IE: Unknown: 0706313920010910
          Cell 10 - Address: 00:26:F2:8D:9D:31
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=21/70  Signal level=-89 dBm  
                    Encryption key:on
                    ESSID:"ROBERT1"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000e7ab39d80
                    Extra: Last beacon: 1268ms ago
          Cell 11 - Address: 20:4E:7F:9B:15:7F
                    Channel:153
                    Frequency:5.765 GHz (Channel 153)
                    Quality=24/70  Signal level=-86 dBm  
                    Encryption key:on
                    ESSID:"NETGEAR17-5G"
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
But wait there is more:

Code:
bjrohan_bjrohan-MM061:~$ cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8
and some more info

Code:
bjrohan_bjrohan-MM061:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"Rohan"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:21:29:9C:D4:9D   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=54/70  Signal level=-56 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:2  Invalid misc:332   Missed beacon:0
Wait for it:

Code:
bjrohan_bjrohan-MM061:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:19:b9:7d:80:ce  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          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:142 errors:0 dropped:0 overruns:0 frame:0
          TX packets:142 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:14726 (14.7 KB)  TX bytes:14726 (14.7 KB)

wlan0     Link encap:Ethernet  HWaddr 00:1b:77:46:32:0b  
          inet addr:192.168.1.111  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21b:77ff:fe46:320b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:34490 errors:0 dropped:0 overruns:0 frame:0
          TX packets:30500 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:34967695 (34.9 MB)  TX bytes:7538681 (7.5 MB)
These were all taken while my speed is 6MB download

Thank you for your help and input!