<br><br><div class="gmail_quote">On Thu, Apr 8, 2010 at 9:11 PM, John-Thomas Richards <span dir="ltr"><<a href="mailto:jtr@jrichards.org">jtr@jrichards.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On Thu, Apr 08, 2010 at 07:20:38PM -0400, Michael Mol wrote:<br>
> On Thu, Apr 8, 2010 at 6:58 PM, John-Thomas Richards <<a href="mailto:jtr@jrichards.org">jtr@jrichards.org</a>> wrote:<br>
> > On Thu, Apr 08, 2010 at 06:41:38PM -0400, Michael Mol wrote:<br>
> >> On Thu, Apr 8, 2010 at 6:19 PM, John-Thomas Richards <<a href="mailto:jtr@jrichards.org">jtr@jrichards.org</a>> wrote:<br>
> >> > I bought an Acer Aspire One for my wife. It came with Win7 Starter<br>
> >> > Edition. W7SE is a dog. I installed Ubuntu (full, not Netbook Remix)<br>
> >> > on it. It is much snappier than Win7. However, wifi does not work as<br>
> >> > well under Ubuntu as it does under Win7. Win7 shows signal strength<br>
> >> > around 85% and Ubuntu (NetworkManager) shows it around 42%. Googling<br>
> >> > has revealed that these figures may not be accurate. I am inclined to<br>
> >> > trust them since Win7 never experiences loss of network connectivity<br>
> >> > whereas Ubuntu experiences frequent drops.<br>
> >><br>
> >> The actual "quality" measurement isn't so simple as a percentage; the<br>
> >> driver itself will be reporting a signal strength in dB and a noise<br>
> >> strength in dB. Your actual connection quality depends on your<br>
> >> signal-to-noise ratio. That "percentage" is going to be some<br>
> >> calculation based on those two numbers. If you drop into an xterm and<br>
> >> run 'iwconfig (interface)', what does it say?<br>
> ><br>
> > root@djr-laptop:~# iwconfig wlan0<br>
> > Link Quality=26/70 Signal level=-84 dBm<br>
</div>[snip]<br>
<div class="im">> > [ 1927.216729] ath9k: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x40000020<br>
><br>
> Sounds like the ath9k driver is having problems?<br>
<br>
</div>Yes, that was the problem. I upgraded linux-backports-modules-karmic and<br>
linux-backports-modules-wireless-karmic-generic. The netbook is now<br>
showing ~80% signal strength.<br>
<br>
As a bonus I switched to WPA since I realized I posted my WEP key and<br>
SSID. :-)<br>
<br>
Thanks to all who responded. It got me thinking and helped to narrow my<br>
googling. Here is the thread that helped me:<br>
<a href="http://ubuntuforums.org/showthread.php?t=1309605&highlight=AR928X" target="_blank">http://ubuntuforums.org/showthread.php?t=1309605&highlight=AR928X</a><br>
<font color="#888888">--<br>
john-thomas<br>
------<br>
I always cheer up immensely if an attack is particularly wounding<br>
because I think, well, if they attack one personally, it means they<br>
have not a single political argument left.<br>
Margaret Thatcher<br>
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</div></div></blockquote></div><br><br>Hope it works out for you with your new fix. By any chance ar eyou using ATT UVerse for your internet connection? I had this problem w/ my Ubuntu laptop and my wife's MacBook? Turns out the residential gateway was bad, it was a referub instead of a brand new residential gateway.... and that solved our disconnets, along w/ moving the baby monitor away from the gateway<br>