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Re: [Discuss-gnuradio] USRP2 dies

From: Tim Pearce
Subject: Re: [Discuss-gnuradio] USRP2 dies
Date: Mon, 21 Sep 2009 18:02:14 +0100

This seems very similar I had with the same chipset/dell laptop (probably the one you saw) -- does ethtool -a eth0 say Rx: On ?

If not "ethtool -A eth0 rx on" (as root) fixed the problem for us

I cant remember if this solution was replied to on the mailing list..



On Mon, Sep 21, 2009 at 3:47 PM, Chukhman, Ilya A. <address@hidden> wrote:
The Auto-negotiation is set to auto for eth0, which I believe is the correct setting.  The entire output of ethtool is below.
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: Unknown! (65535)
        Duplex: Unknown! (255)
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x000000ff (255)
        Link detected: no
-----Original Message-----
From: Matt Ettus [mailto:address@hidden]
Sent: Monday, September 21, 2009 12:50 AM
To: Chukhman, Ilya A.
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] USRP2 dies
Chukhman, Ilya A. wrote:
> Hello,
> My USRP2 dies during transmission when using interpolation rates less
> than 24. When that happens, the USRP2 does not respond to any commands,
> including find_usrps, until it is rebooted. Looking at previous threads
> on this list, I noticed that other people experienced similar problems,
> but it wasn’t apparent if they found solutions to them.
> I have the USRP2 directly connected to a Dell laptop that has a Broadcom
> NetXtreme BCM5755M chipset.  I have enabled real-time scheduling in
> indicates that my Ethernet chip is supported.  What Ethernet
> flow-control settings do I need to set in Ubuntu 9.04 on my laptop?
Have you checked the flow control settings?  What does ethtool report?

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