If you are getting connected for 5-10 minute, then I don't think it's the
driver. Sounds like an confect.

Thanks, that's a start, now any ideas of how I find out who is fighting with
who?

I know there's an way but I don't how to tell you. Maybe someone knows. What
are you running?

The easiest way to resolve this undesirable situation, although not
the most elegent, would be to buy a different wireless network card,
one that you know is well supported on ubuntu 10.04. I presume it's an
easily replacable card since it's a desktop machine. If that doesn't
do it then replace the Buffalo router. On a good day you should be
able to buy both for under $50.

No doubt within the next one
or two kernels there will be support for this wireless card. But if the
hardware provider fails to support Linux and someone want to use Linux.
Don't buy hardware that is not supported. I have dropped a line to
every hardware manufacture that has not supported their goods on the
Linux platform. I take sales people's time to verify a product will work
on Linux, and return anything that won't, after getting the store's word
that it will. I believe this pressure from consumers will in turn go
uphill to the manufacturers to clearly state on the box the product,
will, or will not work in Linux.

I am teaching "Computers, beyond basics" at the Library. I tell people
Linux is the cutting edge, and it is foolish to buy hardware that is not
supported on the platform of the future. I let them know that a bad
purchase will require upgrades in hardware if they don't use this
advice, so save money now and only buy systems that are compatible.

When I write to a manufacture I let them know what I teach, and let them
know how many Linux installs I have done in the last year. I also let
them know there is no way to know how many installs have been made, or
how this has eroded the Windows share of consumers, because of the large
numbers of systems that are no longer booting in Windows but stay in the
stats as windows count. I let them know that the hardware that is a
problem with Linux is on my no recommend list when I am asked about a
solution. I tell People with bad (windows only) wifi cards to recommend
to the manufacture that they work with Mad Wifi to come up with a
solution. That company came up with a contract that worked with Athros,
and I am sure they could with other manufactures. The need to keep power
level switches closed and hooks open to make Linux development a reality
and stay within FCC rules was the main issue.

In the mean time I used a dongle for wifi on my laptop with Ubuntu 8.04
because there is no deal breaker for security when connected to the
outside world for me. Note that by version 8.10 mad wifi had worked out
a deal with Athros and a driver was supplied to the Linux team and
available with no more problems for my system. The closed part of the
driver was disclosed when it installed, but an easy decision to use it
was made.

One of the best parts of a growing and vocal Linux community, is the
power to be recognized by manufacturers in their effort to get market
share. We must use our numbers to get Linux supported by computer parts
manufacturers. Send an E-mail to the manufacture of anything that
doesn't just work! Let them know they are loosing sales and should
consider working with the Linux team of developer on drivers for the
Linux platform.

One more note: I sent this E-mail from my Aspire One Using a Mifi from
Virgin Mobile. I completely set it up while running Ubuntu 10.04 using
the browser. That is Linux support!

Thank you for those kind words! Long before Linux was a serious
desktop O/S I made the same recommendation to Windows users. There is
fairly complete hardware support in Windows but it is by no means
universal yet and never will be. Linux is not that far behind and the
joy of connecting a peripheral to a Linux machine and finding it "just
works" is indescribable...

The problem is whether the dropped signal is due to the wireless
adapter or the router itself and as Leslie Anne says you may end up
replacing one or both. FWIW I've had trouble with connectivity on
Buffalo routers and they do appear to be more susceptible to dropped
connections due to interference, Mobile phone / DECT phones being the
major culprit here so make sure these are not near the router or
line-of-sight to the adapter. Also worth mentioning that with Wi-Fi a
small change in the location of either router or adapter can have a
large effect on the quality of connection so try this too.

Question: When the connection drops what happens if you unplug the USB
adapter and plug it back in again ? If it restores connection for a
short time then I'd suspect the adapter rather than anything else so
try a different one.

In a case like this, the first thing to do is change the channel on the router.
If you click on the network manager icon, how many wireless networks do you see?