Hi,

I upgraded to 3.10.2, it always runs but there are underruns immediately
after executing. If i leave it, it freezes and crashes in minute.

More system info: Intel i7-6900K, 16 cores @ 3.2Ghz, max Ghz 4.0. 62.8Gb
ram.

-Rich

On Mon, Dec 4, 2017 at 4:20 PM, Marcus D. Leech via USRP-users <
usrp-users@lists.ettus.com> wrote:

> On 12/04/2017 04:11 PM, rjm96 via USRP-users wrote:
>
> HI All,
>
> I'm running the same setup as last time I emailed-4 X310s, 1gig ethernet,
> Ubuntu 17.04, UHD 3.96 and GNU Radio 3.7.12. My flowgraph is 8 complex
> inputs into a USRP sink, and I can attach it if need be. Each input is a
> some wave of different frequency, at a 2M sample rate.
>
> Could you try upgrading to a newer (3.10.X) release of UHD?
>
> Also, what are the specs on your computer?
>
>
>
> Anyways, the new flowgraph solved the previous problem of not even
> starting and freezing almost immediately. However this one has 3 different
> errors that I can't pinpoint. I never get them at the same time, but i get
> them each about half of the time whenever I execute the flowgraph in grc or
> call top_block.py from the terminal. Here are the two errors copied and
> pasted below.
>
> [WARNING] [X300] x300_dac_ctrl: front-end sync failed. unexpected FIFO
> depth [0x0]
>
> Or
>
> thread[thread-per-block[24]: <block gr uhd usrp sink (1)>]: RuntimeError:
> x300_dac_ctrl: front-end sync failed. unexpected FIFO depth [0x0]
>
> The 0x0 can be other hex values too, like 0x7 for example. The first
> error, it doesn't transmit but keeps running while on the second it just
> fails entirely. Note-I am not using RFNoC, it just a normal imahe
> downloaded with uhd_images_downloader The other error is:
>
> terminate called after throwing an instance of 'uhd::io_error'
>   what():  EnvironmentError: IOError: [1/DmaFIFO_0] sr_read64() failed:
> EnvironmentError: IOError: Block ctrl (CE_00_Port_30) no response packet -
> AssertionError: bool(buff)
>   in uint64_t ctrl_iface_impl::wait_for_ack(bool)
>   at /home/mcl-sdvlc/prefix/default_prefix/src/uhd/host/
> lib/rfnoc/ctrl_iface.cpp:197
>
> While I know the top one is a FPGA error, I'm not sure what the second is.
>
>  Finally, when it does run, sometimes one of the USRPs is not transmitting
> or not transmitting on both channels, though there are no error messages.
>
> Thanks,
> Rich
>
>
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