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[Discuss-gnuradio] kernel freeze during continuous transmission using US

From: Jung Il Choi
Subject: [Discuss-gnuradio] kernel freeze during continuous transmission using USRP2
Date: Mon, 21 Dec 2009 15:31:23 -0800
User-agent: Thunderbird (X11/20080925)


I am using ucla-zigbee stack for continuously transmitting a fixed symbol (all zeroes) for 802.15.4. I finally made it to work on USRP2 with RFX2400, but now my machine's kernel freezes after 5~10 minutes (even no ping responses). Basically, using sig_source I generate a stream of a constant 0's, and feed it to 802.15.4 modulator to transmit O-QPSK signal.

When I do packetized transmissions once a second, I do not see the freezing problem. I only see this when I continuously transmit.

Does anyone has any clue/suggestion? I am using Ubuntu 8.04 with the kernel 2.6.24-21, and using D-Link DGE-560T gigabit pci-express adapter.
Jung Il Choi

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