On 01/03/17 11:16, Adam Van Ymeren wrote: > On 01/03/17 02:15, Anthony J. Bentley wrote: >> Adam Van Ymeren writes: >>> I was attempting to to use android's adb toolbut when I enable usb >>> debugging on my phoneit appears to repeatedly detach/reattach the device. >>> >>> Anyone experience this before or have any advice on how to debug this? >>> >>> Jan 2 15:12:30 adam-laptop /bsd: ugen2 at uhub0 port 5 "Samsung Galaxy >>> Nexus" rev 2.00/2.16 addr 2 >> This seems to be a problem with the Galaxy Nexus, and I've seen it on >> mine. I did buy another Galaxy Nexus to pass on to any dev with >> potential interest but couldn't reproduce the problem on the new phone; >> maybe I forgot to enable USB debugging. > > Interesting, it doesn't happen plugging my Galaxy Nexus into a Linux of macOS > machine, also doesn't happen on OpenBSD using different android phones. > Definitely something specific with the combination of OpenBSD and the Galaxy > Nexus. > > I did some more digging, if I'm reading this right, shortly after the device > connects, ehci.c reads the "Connect Status Change" register, triggers another > uhub_explore, which calls uhub_port_connect, which detaches the existing > device. > > > I'm reading the linux usb drivers to try to fiure out what it's doing > different, but this isn't my area of expertise :). > > > Follows is some more debugging information if anyone is interested > > Here's the lsusb -v output from a linux machine: > > [ ... snip ...] > > Also some dmesg output with usbdebug = 0xff; of the device re-attaching a few > times. > > [ ... snip ...]
I have a similar galaxy nexus and noticed the same degradation when usb debugging is enabled. I built a USB_DEBUG kernel and collected some additional information from the usb of a pc engines apu2c4. The -current dmesg is appended. The details are at http://arp.thrush.com/obsd/galaxy_nexus/: [1] Briefly annotated transcript of console log from debug kernel (grep '#' messages.annotated) [2] Another copy of the -current dmesg [3] directory w/ linux info about the nexus device including excerpt from /var/log/messages and a few lsusb -v results. [1]<http://arp.thrush.com/obsd/galaxy_nexus/messages.annotated> [2]<http://arp.thrush.com/obsd/galaxy_nexus/dmesg.boot> [3]<http://arp.thrush.com/obsd/galaxy_nexus/linux/>
