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I use my desktop PC and laptop concurrently. When I log in through my laptop, the internet goes down for a minute.

I use Ubuntu 10.4 on my desktop and Windows 7 on my laptop. I use a Pirelli router. The desktop is connected by wire, the laptop gets wireless access.

Any idea?

UPDATE

Desktop

      inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0

Laptop

   IPv4 Local address : 192.168.1.3 Mask : 255.255.255.0 Gateway : 192.168.1.1
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Can you please provide and ipconfig/ifconfig from the machines? Or at least IP/DHCP configuration information? – techie007 Dec 29 '11 at 16:48
Is it safe to provide my ifconfig command outcome? – giannosfor Dec 29 '11 at 21:42
If we talking about your local IP's, yes it's safe. No body can find your computers ;) – RecNes Dec 30 '11 at 14:09
Is it ok now?Does it makes any difference? – giannosfor Dec 30 '11 at 18:25
Looks like there is no IP conflicts if there were no other device connected on your network (eg.IPTV, VOIP device, NAS server) Did you call service for router? The router seems suspicious to me. – RecNes Jan 20 at 14:00
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If both machine has same IP address, modems DHCP server might be crushed for a while... Check each machine's IP settings. If same change one of them to different IP or be sure both (at least one of them) configured for DHCP.

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