Hi Dave, This is certainly an interesting issue. I suspect the core of the issue may be power draw on the USB interface during boot. One of the common issues with the XU4 that I've seen reported is that the USB3 ports do not provide USB3 spec power levels.
Using a powered USB3 hub may resolve the issue. Another option would be a Y power cable such as this http://www.ebay.com/itm/262045046196 which would allow you to use an external power adapter to feed power to the USRP. Another test you could try -- Try using the USB2 on the XU4. Does it result in the same boot up problems? I have a early rev 0.1 20151201 XU4 that I often use paired with a B205mini and have not seen any issue such as this. Regards, Nate Temple > On Sep 2, 2017, at 1:44 AM, David via USRP-users <usrp-users@lists.ettus.com> > wrote: > > Hi All, > > I'm trying to get XU4 and B200mini to work together, but having a serious > issue: the SD card gets trashed! > > I'm using Ubuntu 16.04 image from the Odroid site, kernel 4.9.28-38, and > latest GIT clone of UHD (as of two weeks ago). Two uSD cards I had are now > totally trashed. I'm on my last card. They seem to get totally trashed after > I run uhd-fft a few times. > > The main symptom is that if the B200mini is connected and I reboot, an fsck > is done every time, and also has the effect of continually rebooting, and > continually corrupting the card. > > Unplug the B200mini and all is fine (after a couple of fscks). I managed to > work out that if I remove the udev rule that starts up UHD (uhd-usrp.rules) I > am also able to reboot with no issues. So a driver issue? > > Without the udev rule I get the following, which I'm assuming is normal?: > > [ 24.555119] usb 3-1.1: device descriptor read/64, error -110 > [ 29.995114] usb 3-1.1: device descriptor read/64, error -110 > [ 45.675119] usb 3-1.1: device descriptor read/64, error -110 > [ 56.685085] usb 3-1.1: device not accepting address 5, error -62 > [ 67.565082] usb 3-1.1: device not accepting address 6, error -62 > [ 67.569976] usb 3-1-port1: unable to enumerate USB device > > Hope you can help, thanks, > > Dave. > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
