I had been having issues with erratic loss of connection to a USB accessory.&nbsp;<div>The log showed "could not open /dev/usb_accessory".&nbsp;</div><div>Extensive troubleshooting revealed that adb was interfering with the USB connection and invalidating the filedescriptor for the accessory.<br><br>On Tuesday, January 15, 2013 9:36:45 AM UTC-6, Andy Doan wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">I'm sending this email to gauge interest in a proposed change to 
<br>host-side ADB:
<br>
<br>I'm currently using ADB in conjunction with a USB mass storage device 
<br>that must be powered on/off repeatedly via the /sys interface on I&nbsp;<br>Linux[1]. This was working correctly until I recently added ADB into the 
<br>workflow. The problem I now see is that this sequence won't work:
<br>
<br>&nbsp; power off device
<br>&nbsp; run set of adb commands (that cause the daemon to run in background)
<br>&nbsp; power on device
<br>
<br>It seems the probing of my devices entry under /dev/bus/usb is causing 
<br>it to enter a weird state. The only way I've gotten it out of that state 
<br>is to run "adb kill-server" and then physically unplug/plug the device.
<br>
<br>My proposed solution (attached) gives you two options:
<br>
<br>* ignore USB devices entirely
<br>* black list certain devices
<br>
<br>I would like to see this patch make it to AOSP in some form, but I'm not 
<br>sure if my use-case is too specific for you guys. Any interest?
<br>
<br>1: <a href="http://people.linaro.org/~doanac/sdmux/sdmux.sh" target="_blank">http://people.linaro.org/~<wbr>doanac/sdmux/sdmux.sh</a>
<br></blockquote></div>