Ubuntu 9.10 internet connection troubles

[Goinac]

I upgraded recently to Ubuntu 9.10 on a laptop HP (compaq 6710b). Initially everything went fine. Now, however, I cannot connect to internet - be it wired or wireless: the connection is established, seems fine, yet neither Mozilla, nor Epiphany do not seem to work. This happens, as I said, irrespective whether the
connection is established either via ethernet (wired) or wireless - and both connections, according to Ubuntu, are fine.
The weird thing is that my browsers are set on no proxy, as they should. I managed to get on internet at the library, where I had to set up a fix IP and a specific port. Then my browsers functioned well. Any help, please?
(Of course, outside of library, I use the no proxy -as I need no proxy at home or at work, but the browsers refuse to 'see' anything, despite the fact that the connection is established and all right)
Thanks!
Alex

[elija]

It may be IPV6 issues.

Right click on Network Manager and click "Edit Connections"
Choose you Connection and click Edit
Click IPV6 Settings and set to ignore.
Click apply and enter your password

In firefox
Navigate to about:config
Search for ipv6
Make sure that network.dns.disableIPv6 is set to false

Warning this part of Firefox can cause some real damage to the browser

[Goinac]

Thank you so much Elija,

Unfortunately I have checked both the network manager and the firefox settings
and I did not have to change anything, as everything was as indicated by you:
on network manager ipv6 was on ignore, and navigating on firefox to the ipv6
stuff, it was already on 'false.'

Once again, thank you for you effort
Alex

[academic777]

I have had same problem, but with a twist. After upgradig on 9.10 I found I didn't recognise the router on my system. I checked my ip address and found it had mysteriously reset to a whacko IP number. My interfaces script was set up for dhcp and it worked fine prior to the upgrade. I first thought that perhaps I didn't restart properly and restarted about five times but none of them helped. I then went to the router on another computer and got the acceptable ip range and the subnet mask and rescripted my interfaces with a static ip. It worked fine for a few weeks. I now have to start my computer a couple of times before it will pick up the ip. There is definitely something going on but I can't figure it out either. I did find that on startup my system would hang a bit at "mounting usb... something" and one time when I simply walked away from it at this time it took about half an hour to get past it, where I would have rebooted prior (bad habit, I know). After I let it work through that "hang" by itself, it has been better. If I could get info on the way the system is loading and how each file is loading up, I might be able to figure out something, but time is an issue and I, too, am just a newbie to linux usage. Don't feel alone, I am battling the same problem. I think, though, that setting a static ip has nearly soved it for me.
Academic777

[coopstah13]

perhaps there was a recent kernel update that broke things, i would try running oldest kernel you have installed and see what happens

also try getting IP on command line

sudo dhclient eth0

if this fails, post results

[Goinac]

I am a very beginner.
I did what you suggested, typed in the terminal the sudo command
and that's what I got:

Listening on LPF/eth0/00:1a:4b:78:f8:e2

Sending on LPF/eth0/00:1a:4b:78:f8:e2

Sending on Socket/fallback

DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3

DHCPOFFER of 192.168.13.147 from 192.168.13.146

DHCPREQUEST of 192.168.13.147 on eth0 to 255.255.255.255 port 67

DHCPACK of 192.168.13.147 from 192.168.13.146

bound to 192.168.13.147 -- renewal in 39289 seconds.

I should perhaps add that at the time my laptop was connected to a wired network,
Unfortunately the wireless connection does not seem to work after this command either.
More, it seems to me, but I might be wrong, that from now on the
"enable wireless" option is dead, not active any longer.

I'll keep trying

[Goinac]

I have had same problem, but with a twist. After upgradig on 9.10 I found I didn't recognise the router on my system. I checked my ip address and found it had mysteriously reset to a whacko IP number. My interfaces script was set up for dhcp and it worked fine prior to the upgrade. I first thought that perhaps I didn't restart properly and restarted about five times but none of them helped. I then went to the router on another computer and got the acceptable ip range and the subnet mask and rescripted my interfaces with a static ip. It worked fine for a few weeks. I now have to start my computer a couple of times before it will pick up the ip. There is definitely something going on but I can't figure it out either. I did find that on startup my system would hang a bit at "mounting usb... something" and one time when I simply walked away from it at this time it took about half an hour to get past it, where I would have rebooted prior (bad habit, I know). After I let it work through that "hang" by itself, it has been better. If I could get info on the way the system is loading and how each file is loading up, I might be able to figure out something, but time is an issue and I, too, am just a newbie to linux usage. Don't feel alone, I am battling the same problem. I think, though, that setting a static ip has nearly soved it for me.
Academic777

Thanks a lot!
It sees that I'm in the same situation: on a fixed proxy it works (at the library)
but on a 'free' wireless (or one protected via password) it doesnt.

[Goinac]

I am using my laptop at home, where I have a wired LAN connection
and at my office at school, where there are 2 ways of connecting: LAN and
Wireless.
At home Ubuntu 9.10 does connect through wired LAN
at offfice it does not connect neither via LAN not via wireless.

It just gets 'craziera and crazier' to bring Lewis Caroll in.

Thanks again.

[coopstah13]

do you have the correct wireless driver/firmware installed and is your wireless card even detected?