Try strace uhd_usrp_probe and see if you can see which system call returns -EPERM. Yes this is a hail mary operation.
Philip On 12/28/2017 01:13 PM, Michael Don via USRP-users wrote: > I'm still getting the same error with the USB 2.0 for the B200 on my tegra > system. > > Using lsusb I can see the B200 listed as: > > Bus 001 Device 031: ID 2500:0020 > > I can then find /dev/bus/usb/001/031 and verify that it has the correct > permissions: > > crw-rw-rw- 1 root flirimaging 189, 30 Dec 28 18:04 031 > > Just to test things out, I've even changed the permissions, reloaded the > udev rules, and noted that the permissions change back. > > So in spite of verifying the B200 permissions, I still get the same error > listed in my original email. Does anyone have any other suggestions? > > -Mike > > > On Fri, Dec 22, 2017 at 3:13 PM, Michael Don <miked...@gmail.com> wrote: > >> Marcus, >> >> Yes, "sudo udevadm control --reload-rules" is included in the "Setup Udev >> for USB" instructions. I also tried replugging in the unit. I'll try >> debugging some more and let you know if I come up with anything. >> >> Philip - thanks for letting me know about the acceleration, once I get >> things working I may ask you more about it. >> >> -Mike >> >> >> On Tue, Dec 19, 2017 at 7:58 PM, Philip Balister via USRP-users < >> usrp-users@lists.ettus.com> wrote: >> >>> On 12/19/2017 06:44 PM, Marcus D. Leech via USRP-users wrote: >>>> On 12/19/2017 05:09 PM, Michael Don via USRP-users wrote: >>>>> >>>>> I've build and installed UHD 3.10.1.1 on a Tegra TX2 (ARM64 >>>>> platform). The USB 3.0 is working, but I'm getting errors with the >>>>> USB 2.0 on a USRP B200. >>> >>> I know UHD works on several aarch64 platforms. I do carry a patch in >>> meta-sdr that enables neon acceleration for the uhd type convertors. >>> >>> Philip >>> >>>>> >>>>> uhd_find_devices works, but uhd_usrp_probe, and the uhd application >>>>> examples give the error below. Note that I've tried running with >>>>> sudo, and have followed the instructions "Setup Udev for USB" about >>>>> the uhd-usrp.rules file. Any advice? >>>>> >>>>> Thanks, -Mike >>>>> >>>>> >>>>> linux; GNU C++ version 5.4.0 20160609; Boost_105800; >>>>> UHD_003.010.001.001-0-unknown >>>>> >>>>> -- Detected Device: B200 >>>>> -- Operating over USB 2. >>>>> -- Initialize CODEC control... >>>>> >>>>> UHD Error: >>>>> An unexpected exception was caught in a task loop. >>>>> The task loop will now exit, things may not work. >>>>> EnvironmentError: IOError: usb rx8 transfer status: >>>>> LIBUSB_TRANSFER_ERROR >>>>> -- Detected bad USB state; resetting. >>>>> >>>>> UHD Error: >>>>> USB open failed: insufficient permissions. >>>>> See the application notes for your device. >>>>> Error: AssertionError: libusb_open(_dev->get(), &_handle) == 0 >>>>> in >>>>> libusb_device_handle_impl::libusb_device_handle_impl(uhd:: >>> transport::libusb::device::sptr) >>>>> >>>>> at >>>>> /home/nvidia/Documents/USB3/uhd-release_003_010_001_001/host >>> /lib/transport/libusb1_base.cpp:261 >>>>> >>>>> >>>>> >>>>> >>>> >>>> Did you: >>>> >>>> sudo udevadm control --reload-rules >>>> >>>> After installing the usrp rules file? >>>> >>>> Did you unplug/replug, after updating the rules? The rules are only >>>> *triggered* when a USB device event happens, so if it's still plugged in >>>> when you change >>>> the rules, nothing will happen until you re-plug. >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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 >>> >> >> > > > > _______________________________________________ > 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
