no network connection

Are you able to see wireless networks available to you by left clicking on the icon in the top right? Personally, I'm new to ubuntu as well and happened to stumble upon the fact that left clicking and right clicking on the same icon opens new options. Make sure that you right click on the icon and check off "enable wireless". Then left click on the icon to select the network. Hope this helps!

Also, I'm not sure if this applies but many notebooks come with a physical switch that turns your wireless radio on or off. This switch or button can be found on the outer edge of the laptop or is sometimes located near the power switch. Sometimes you can turn it on by pressing function + F2.

Thank you, but i have it enabled and my wireless radio is on.
=(
i still have no internet.
i want to use my laptop!!!
someone please help me!!

can you please provide the output of:

sudo lshw -C network
sudo iwlist scan
ifconfig

Thanks

You may need to use a wired connection initially to get full updates as well as get drivers for your system.

potter@potter-laptop:~$ sudo -C network sudo iwlist scan ifconfig

sudo: illegal option `-C'

usage: sudo -h | -K | -k | -L | -l | -V | -v

usage: sudo [-bEHPS] [-p prompt] [-u username|#uid] [VAR=value]

            {-i | -s | <command>}

usage: sudo -e [-S] [-p prompt] [-u username|#uid] file ...

potter@potter-laptop:~$ sudo -C network sudo iwlist scan ifconfig

sudo: illegal option `-C'

usage: sudo -h | -K | -k | -L | -l | -V | -v

usage: sudo [-bEHPS] [-p prompt] [-u username|#uid] [VAR=value]

            {-i | -s | <command>}

usage: sudo -e [-S] [-p prompt] [-u username|#uid] file ...

potter@potter-laptop:~$ sudo lshw -C network sudo lwlist scan ifconfig

[sudo] password for potter:

Hardware Lister (lshw) - B.02.13

usage: lshw [-format] [-options ...]

       lshw -version

 -version print program version (B.02.13)

format can be

 -html output hardware tree as HTML

 -xml output hardware tree as XML

 -short output hardware paths

 -businfo output bus information

options can be

 -class CLASS only show a certain class of hardware

 -C CLASS same as '-class CLASS'

 -c CLASS same as '-class CLASS'

 -disable TEST disable a test (like pci, isapnp, cpuid, etc. )

 -enable TEST enable a test (like pci, isapnp, cpuid, etc. )

 -quiet don't display status

 -sanitize sanitize output (remove sensitive information like serial numbers, etc.)

 -numeric output numeric IDs (for PCI, USB, etc.)

i cannot use my internet via an enthernet cord either

you didn't type my commands correctly. Each line is its own command.

Why can you not use a wired connection? It would make life a hell of a lot easier

i tried to use my either net cord, and it was attempting to connect, then it said it failed.
sorry, i'm using a different computer for this.

i will post the results

try the wired connection in and then reboot. You should gain dhcp settings.

  *-network

       description: Network controller

       product: BCM4311 802.11b/g WLAN

       vendor: Broadcom Corporation

       physical id: 0

       bus info: pci@0000:03:00.0

       version: 02

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress bus_master cap_list

       configuration: driver=b43-pci-bridge latency=0 module=ssb

  *-network:0 DISABLED

       description: Wireless interface

       physical id: 1

       logical name: wlan0

       serial: 00:1a:73:7b:74:6f

       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: 26:5a:b0:81:cc:60

       capabilities: ethernet physical

       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes

potter@potter-laptop:~$

what do you mean "try the wired connection in and then reboot."?

Open the terminal and type sudo ifconfig eth0 up or right click on the network applet in the top right corner of the window and check the enable box.

there is no need for sudo, users can run ifconfig. Elevated privileges are not needed to run ifconfig

it is enabled. what is a DHCP Client ID?

We still would like to see the output of the commands Actionparsnip requested earlier.

You will have to enable ALL your network devices at least so you can use the ETHERNET (wired) connection to get updates.

I'm satisfied with the lshw output but please try these again and post the output in your reply, thanks!

First:

  sudo iwlist scan

Then:

  ifconfig

Good luck!

potter@potter-laptop:~$ sudo iwlist scan

[sudo] password for potter:

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wmaster0 Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Network is down

pan0 Interface doesn't support scanning.

potter@potter-laptop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1b:24:6d:bb:98
          inet addr:10.42.43.1 Bcast:10.42.43.255 Mask:255.255.255.0
          inet6 addr: fe80::21b:24ff:fe6d:bb98/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1101 (1.1 KB) TX bytes:4036 (4.0 KB)
          Interrupt:20 Base address:0x4000

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:52 errors:0 dropped:0 overruns:0 frame:0
          TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4016 (4.0 KB) TX bytes:4016 (4.0 KB)

sudo ifup wlan0; sudo iwlist scan

potter@potter-laptop:~$ sudo ifup wlan0; sudo iwlist scan

Ignoring unknown interface wlan0=wlan0.

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wmaster0 Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Network is down

pan0 Interface doesn't support scanning.

potter@potter-laptop:~$

I should have noticed this sooner, missing the drivers for wlan0.

see question#74845. Should resolve this first before this one can continue.

However eth0 seems up and working. Is it?

well ya, it says it is connected, but i still don't have internet access

Earlier you posted this about eth0:

eth0 Link encap:Ethernet HWaddr 00:1b:24:6d:bb:98
         inet addr:10.42.43.1 Bcast:10.42.43.255 Mask:255.255.255.0
         inet6 addr: fe80::21b:24ff:fe6d:bb98/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
         RX packets:9 errors:0 dropped:0 overruns:0 frame:0
         TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:1101 (1.1 KB) TX bytes:4036 (4.0 KB)
         Interrupt:20 Base address:0x4000

I'll assume you are connected to a router. Does the router have internet access, and also is the router allowing your connection (ie: no MAC restrictions, etc)? If not, can you bypass the router and connect directly to your modem? If so, then enter this command:

/etc/init.d/networking restart

netgear
wireless cable gateway modem

i am connected directly to the modem with an ethernet cord
the modem has internet access

after entering the command i got this

potter@potter-laptop:~$ /etc/init.d/networking restart

 * Reconfiguring network interfaces... ifdown: failed to open statefile /var/run/network/ifstate: Permission denied

ifup: failed to open statefile /var/run/network/ifstate: Permission denied

                                                                         [fail]

Netgear..this sounds like it's an all-in-one product and bypassing it will be impossible. You should login to the admin page and make sure you're getting a valid IP address from your ISP.

I forgot you need root permissions to do this, my mistake. Try again:

sudo /etc/init.d/networking restart

potter@potter-laptop:~$ sudo /etc/init.d/networking restart

[sudo] password for potter:

 * Reconfiguring network interfaces... Ignoring unknown interface eth0=eth0.

                                                                         [ OK ]

Lets see the device configuration:

gksudo gedit /etc/networking/interfaces

Confirm it has the following:

  auto eth0
  iface eth0 inet dhcp

If either or both lines start with a # symbol, remove the # from each line then save the file, then exit gedit. Restart networking:

sudo /etc/init.d/networking restart

And lets see the output. If this fails then provide this output also:

lspci -v

when i opened gedit through the terminal, there was nothing in it, like an empty word document, are you asking me to put something in it?

Nope, I gave you the wrong info. you should be opening:

/etc/network/interfaces

bash: /etc/network/interfaces: Permission denied

Try it with the WHOLE command as I expressed above :)

gedit only has this

auto lo
iface lo inet loopback

Ok, open the file again (if you closed it)

  gksudo gedit /etc/network/interfaces

ADD this to the file:

  auto eth0
  iface eth0 inet dhcp

SAVE it, then:

sudo ifup eth0

Confirm you've got an IP address by reviewing eth0 config

ifconfig

confirm the hardware with:

lspci -v

Post all the output from the above commands (hopefully I haven't typo'd any :) if it failed or doesn't work still.

potter@potter-laptop:~$ sudo ifup eth0

Internet Systems Consortium DHCP Client V3.1.1

Copyright 2004-2008 Internet Systems Consortium.

All rights reserved.

For info, please visit http://www.isc.org/sw/dhcp/

wmaster0: unknown hardware address type 801

wmaster0: unknown hardware address type 801

Listening on LPF/eth0/00:1b:24:6d:bb:98

Sending on LPF/eth0/00:1b:24:6d:bb:98

Sending on Socket/fallback

DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8

DHCPOFFER of 192.168.0.10 from 192.168.0.1

DHCPREQUEST of 192.168.0.10 on eth0 to 255.255.255.255 port 67

DHCPACK of 192.168.0.10 from 192.168.0.1

bound to 192.168.0.10 -- renewal in 1752 seconds.

potter@potter-laptop:~$ ifconfig

eth0 Link encap:Ethernet HWaddr 00:1b:24:6d:bb:98

          inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0

          inet6 addr: fe80::21b:24ff:fe6d:bb98/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

          RX packets:361 errors:0 dropped:0 overruns:0 frame:0

          TX packets:87 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:42897 (42.8 KB) TX bytes:13403 (13.4 KB)

          Interrupt:20 Base address:0x4000

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:56 errors:0 dropped:0 overruns:0 frame:0

          TX packets:56 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:4292 (4.2 KB) TX bytes:4292 (4.2 KB)

potter@potter-laptop:~$ lspci -v

00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

 Capabilities: <access denied>

00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: 66MHz, fast devsel

00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: 66MHz, fast devsel

00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: 66MHz, fast devsel

00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

 Capabilities: <access denied>

00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: 66MHz, fast devsel

00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)

 Flags: 66MHz, fast devsel

00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)

 Flags: bus master, fast devsel, latency 0

 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0

 I/O behind bridge: 00004000-00004fff

 Memory behind bridge: b4000000-b5ffffff

 Prefetchable memory behind bridge: 00000000d0000000-00000000d01fffff

 Capabilities: <access denied>

 Kernel driver in use: pcieport-driver

 Kernel modules: shpchp

00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)

 Flags: bus master, fast devsel, latency 0

 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0

 Memory behind bridge: b6000000-b7ffffff

 Capabilities: <access denied>

 Kernel driver in use: pcieport-driver

 Kernel modules: shpchp

00:05.0 VGA compatible controller: nVidia Corporation C51 [Geforce 6150 Go] (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 11

 Memory at b2000000 (32-bit, non-prefetchable) [size=16M]

 Memory at c0000000 (64-bit, prefetchable) [size=256M]

 Memory at b1000000 (64-bit, non-prefetchable) [size=16M]

 [virtual] Expansion ROM at 88000000 [disabled] [size=128K]

 Capabilities: <access denied>

 Kernel modules: nvidiafb

00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

 Capabilities: <access denied>

00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a3)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

 I/O ports at 1d00 [size=128]

00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a3)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: 66MHz, fast devsel, IRQ 10

 I/O ports at 3040 [size=64]

 I/O ports at 3000 [size=64]

 Capabilities: <access denied>

 Kernel driver in use: nForce2_smbus

 Kernel modules: i2c-nforce2

00:0a.3 Co-processor: nVidia Corporation MCP51 PMU (rev a3)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10

 Memory at b0040000 (32-bit, non-prefetchable) [size=256K]

00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3) (prog-if 10)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22

 Memory at b0004000 (32-bit, non-prefetchable) [size=4K]

 Capabilities: <access denied>

 Kernel driver in use: ohci_hcd

00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3) (prog-if 20)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22

 Memory at b0005000 (32-bit, non-prefetchable) [size=256]

 Capabilities: <access denied>

 Kernel driver in use: ehci_hcd

00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev f1) (prog-if 8a [Master SecP PriP])

 Subsystem: Device f03c:30b7

 Flags: bus master, 66MHz, fast devsel, latency 0

 [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [disabled] [size=8]

 [virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled] [size=1]

 [virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled] [size=8]

 [virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled] [size=1]

 I/O ports at 3080 [size=16]

 Capabilities: <access denied>

 Kernel driver in use: pata_amd

00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev f1) (prog-if 85 [Master SecO PriO])

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 23

 I/O ports at 30c0 [size=8]

 I/O ports at 30b4 [size=4]

 I/O ports at 30b8 [size=8]

 I/O ports at 30b0 [size=4]

 I/O ports at 3090 [size=16]

 Memory at b0006000 (32-bit, non-prefetchable) [size=4K]

 Capabilities: <access denied>

 Kernel driver in use: sata_nv

00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2) (prog-if 01)

 Flags: bus master, 66MHz, fast devsel, latency 0

 Bus: primary=00, secondary=07, subordinate=07, sec-latency=64

 Memory behind bridge: b8000000-b80fffff

 Capabilities: <access denied>

00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21

 Memory at b0000000 (32-bit, non-prefetchable) [size=16K]

 Capabilities: <access denied>

 Kernel driver in use: HDA Intel

 Kernel modules: snd-hda-intel

00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a3)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 20

 Memory at b0008000 (32-bit, non-prefetchable) [size=4K]

 I/O ports at 30e0 [size=8]

 Capabilities: <access denied>

 Kernel driver in use: forcedeth

 Kernel modules: forcedeth

00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration

 Flags: fast devsel

 Capabilities: <access denied>

00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map

 Flags: fast devsel

00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller

 Flags: fast devsel

00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control

 Flags: fast devsel

 Capabilities: <access denied>

 Kernel driver in use: k8temp

 Kernel modules: k8temp

03:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 02)

 Subsystem: Hewlett-Packard Company Device 1374

 Flags: bus master, fast devsel, latency 0, IRQ 19

 Memory at b6000000 (64-bit, non-prefetchable) [size=16K]

 Capabilities: <access denied>

 Kernel driver in use: b43-pci-bridge

 Kernel modules: wl, ssb

07:05.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (prog-if 10)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, medium devsel, latency 64, IRQ 5

 Memory at b8000000 (32-bit, non-prefetchable) [size=2K]

 Capabilities: <access denied>

 Kernel driver in use: ohci1394

 Kernel modules: firewire-ohci, ohci1394

07:05.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: bus master, medium devsel, latency 64, IRQ 7

 Memory at b8000800 (32-bit, non-prefetchable) [size=256]

 Capabilities: <access denied>

 Kernel driver in use: sdhci-pci

 Kernel modules: sdhci-pci

07:05.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 0a)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: medium devsel, IRQ 11

 Memory at b8000c00 (32-bit, non-prefetchable) [size=256]

 Capabilities: <access denied>

 Kernel driver in use: ricoh-mmc

 Kernel modules: ricoh_mmc

07:05.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 05)

 Subsystem: Hewlett-Packard Company Device 30b7

 Flags: medium devsel, IRQ 11

 Memory at b8001000 (32-bit, non-prefetchable) [size=256]

 Capabilities: <access denied>

07:05.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev ff) (prog-if ff)

 !!! Unknown header type 7f

Ok, so your eth0 now has a valid IP from the router. If your router is setup properly you should have internet, if not you'll need to look at your router for the problem.

Your wlan0 is still reporting problems but thats to be expected, you are getting assistance in the other thread for this.

you should be able to try the following for a test:

ping 192.168.0.1

and you can try pinging externally:

ping www.yahoo.com

=D!!!!!
i really do with there was someway i could repay you for your time.
thanks so much Jeruvy!!!!!!

i now have a wired connection

Glad its working. Remember we are an open source community so some time you may repay the effort.

Cheers.