Get this. Whenever I boot my computer with the 2.6.x.FC2smp kernel, my network card behaves very strangely: connectivity is sporadic at best, and many connections time out completely. Pings even to other computers on my own network indicate packet drops of up to 94% (except for 127.0.0.1, of course). When I boot into the non-SMP kernel, though, I don't experience this problem. All of the network settings are the same whether I boot into SMP or not. I've examined dmesg, of course, and there seems to be some sort of IRQ problem. Here is part of dmesg: NETDEV WATCHDOG: eth0: transmit timed out eth0: transmit timed out, tx_status 00 status e601. diagnostics: net 0cfa media 8880 dma 0000003a fifo 0000 eth0: Interrupt posted but not delivered -- IRQ blocked by another device? Flags; bus-master 1, dirty 64(0) current 64(0) Transmit list 00000000 vs. 1a668200. 0: @1a668200 length 8000002a status 0001002a 1: @1a6682a0 length 8000002a status 0001002a 2: @1a668340 length 8000002a status 0001002a 3: @1a6683e0 length 8000002a status 0001002a 4: @1a668480 length 8000002a status 0001002a 5: @1a668520 length 8000002a status 0001002a 6: @1a6685c0 length 8000002a status 0001002a 7: @1a668660 length 8000002a status 0001002a 8: @1a668700 length 8000002a status 0001002a 9: @1a6687a0 length 8000002a status 0001002a 10: @1a668840 length 8000002a status 0001002a 11: @1a6688e0 length 8000004d status 0c01004d 12: @1a668980 length 8000004d status 0c01004d 13: @1a668a20 length 8000004d status 0c01004d 14: @1a668ac0 length 8000004d status 8c01004d 15: @1a668b60 length 8000004d status 8c01004d eth0: Resetting the Tx ring pointer. I've gone into the network configuration tool several times, and reset everything I could think of, even changed the IRQ value. Nothing seems to help. Any thoughts or suggestions would be greatly appreciated. -- Richard S. Crawford / http://www.mossroot.com AIM: Buffalo2K / ICQ: 11646404 / Y!: rscrawford ""We live as though the world were how it should be, to show it what it can be." --"Angel", Season 4 ep. 1