On 09/02/2017 05:02 PM, Nate Temple via USRP-users wrote:
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.
I run a *PAIR* of b205-minis on an Odroid XU4, but I use an external,
powered, USB-3.0 hub. I don't recall ever having a filesystem trashing
problem, but
I use an Arch image.
Modulo kernel bugs, there's no way for UHD applications or hardware to
"trash your filesystem". So, if this is an issue, then the issue is
with the
underlying OS+drivers implementation. None of the UHD code runs in
kernel space, and runs as an ordinary user.
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