Subject: de0: abnormal interrupt: transmit underflow (fwd)
To: None <,>
From: fission <>
List: tech-net
Date: 01/11/2000 18:30:27
I am forwarding this message along because I did not get any replies for
this on the port-macppc list.  Please cc: any replies to me as I am not on

What exactly is a transmit underflow anyways?

Thanks in advance,


---------- Forwarded message ----------
Date: Sun, 2 Jan 2000 00:26:36 -0600 (CST)
From: fission <>
Subject: de0: abnormal interrupt: transmit underflow


I never really noticed this before (mainly because I leave my serial
console off all the time), but this is the message I keep getting on my
console.  What exactly does this mean?

The computer in question is running NetBSD/macppc 1.4.1 with a Sonic
CommSlot II 10BaseT ethernet card connected via crossover cable to a PC
running Linux with a RealTek RTL8139 (100BaseTX, PCI).

Another thing is that occasionally it seems that the ethernet card on the
Macintosh sort of "freezes" once in a while and I have to reboot;
sometimes just the Macintosh and sometimes both Mac and PC.  Very

Any help would be greatly appreciated,