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POWifi won't stay up on BeagleBone
 

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    <p>I'm running Ubuntu 11.10 on a BeagleBone with an Edimax EW-7711UAn wifi adapter plugged into the USB port. I've configured /etc/network/interfaces and the wifi works, BUT:</p> <ol> <li><p>The wlan0 interface doesn't always come up when booting the device. It comes up successfully about one in three attempts.</p></li> <li><p>The interface sometimes goes down again, especially when not used for a while.</p></li> </ol> <p>The /etc/network/interfaces file includes:</p> <pre><code>auto wlan0 iface wlan0 inet dhcp wpa-driver wext wpa-ssid "Bodoni" wpa-psk "&lt;mypassword&gt;" </code></pre> <p>In order to try to address point 1), I put the following in /etc/rc.local:</p> <pre><code>nohup sh -c "ifdown wlan0 &amp;&amp; ifup wlan0" </code></pre> <p>But it hasn't seemed to help much. I'm guessing that the second problem might be connected with power management, so I might try turning that off in /etc/rc.local.</p> <p>But does anyone have any thoughts on how I might get the wifi to come up reliably on boot? I'm running the BeagleBone headless with no Ethernet (it's on a robot) so it's important I get this fixed!</p> <p>FYI, I'm using the default drivers - lsmod gives:</p> <pre><code>Module Size Used by aes_generic 27837 2 arc4 1111 2 rt2800usb 12386 0 rt2800lib 45146 1 rt2800usb crc_ccitt 1457 1 rt2800lib rt2x00usb 10595 1 rt2800usb rt2x00lib 39077 3 rt2800usb,rt2800lib,rt2x00usb mac80211 228509 3 rt2800lib,rt2x00usb,rt2x00lib cfg80211 167722 2 rt2x00lib,mac80211 rfkill 16703 1 cfg80211 binfmt_misc 6224 1 spidev 4620 0 </code></pre> <p>I'm hoping not to have to compile a new driver because I haven't had much success with that!</p>
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