FC6 Weird Networking Problem

David G. Miller dave at davenjudy.org
Sat Jun 9 01:30:27 UTC 2007


Yesterday everything was fine.  Last night I applied the latest updates 
which logwatch says consisted of:

--------------------- yum Begin ------------------------ 

 
 Packages Updated:
    shadow-utils.i386 2:4.0.17-13.fc6
    autofs.i386 1:5.0.1-0.rc3.31
    xorg-x11-drv-savage.i386 2.1.2-3.fc6
    postgresql-libs.i386 8.1.9-1.fc6
    xorg-x11-server-Xorg.i386 1.1.1-47.9.fc6
    htmlview.noarch 4.0.0-3.fc6


This morning I couldn't unlock xscreensaver and X wouldn't restart after 
I killed it so I ended up rebooting.  Now I'm seeing my ethernet 
connection drop:

Jun  8 17:23:13 bend kernel: tg3: tg3_abort_hw timed out for eth1, 
TX_MODE_ENABLE will not clear MAC_TX_MODE=ffffffff
Jun  8 17:23:13 bend kernel: tg3: eth1: Link is down.

at random.  Even stranger is, if I keep a ping running, the interface 
stays up or at least stays up longer.

Has anyone seen anything like this before or have some idea what's 
causing it?  A Google search for "tg3_abort_hw timed out" returned some 
interesting old stuff but nothing current.  The system has all FC6 
updates applied and has been stable until today.  I can regress to the 
previous kernel (2.6.20-1.2948) or I pulled down the 2.6.21.4 kernel 
from kernel.org.  I'll be trying those shortly.  The NIC is a:

00:09.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 
Gigabit Ethernet (rev 15)
        Subsystem: 3Com Corporation 3C996B-T 1000Base-T
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 19
        Memory at f0000000 (64-bit, non-prefetchable) [size=64K]
        [virtual] Expansion ROM at 88100000 [disabled] [size=64K]
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [48] Power Management version 2
        Capabilities: [50] Vital Product Data
        Capabilities: [58] Message Signalled Interrupts: 64bit+ 
Queue=0/3 Enable

Thanks,
Dave

-- 
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce




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