Hello,

I have laptop thinkpad T61 with 82566MM Gigabit Network Connection (rev 03)
(8086:1049). I have kernel 2.6.24-rc3. E1000E driver does not work (the card
is not detected although it is PCI-E), with E1000 driver, it works mostly OK
unless I force speed to 100Mbits. (ethtool -s eth0 autoneg off speed 100)

I got message about device hang:
Nov 20 10:57:24 anubis kernel: [  212.307502] e1000: eth0: e1000_watchdog:
10/100 speed: disabling TSO
Nov 20 11:03:02 anubis kernel: [  242.811474]   Tx Queue             <0>
Nov 20 11:03:02 anubis kernel: [  242.811476]   TDH                  <80>
Nov 20 11:03:02 anubis kernel: [  242.811478]   TDT                  <81>
Nov 20 11:03:02 anubis kernel: [  242.811480]   next_to_use          <81>
Nov 20 11:03:02 anubis kernel: [  242.811482]   next_to_clean        <80>
Nov 20 11:03:02 anubis kernel: [  242.811484] buffer_info[next_to_clean]
Nov 20 11:03:02 anubis kernel: [  242.811486]   time_stamp <100079cdf>
Nov 20 11:03:02 anubis kernel: [  242.811488]   next_to_watch        <80>
Nov 20 11:03:02 anubis kernel: [  242.811489]   jiffies <100079e68>
Nov 20 11:03:02 anubis kernel: [  242.811491]   next_to_watch.status <0>
Nov 20 11:03:04 anubis kernel: [  243.000047]   Tx Queue             <0>
Nov 20 11:03:04 anubis kernel: [  243.000049]   TDH                  <80>
Nov 20 11:03:04 anubis kernel: [  243.000051]   TDT                  <81>
Nov 20 11:03:04 anubis kernel: [  243.000053]   next_to_use          <81>
and so on.

Is it known problem?


-- 
Lukáš Hejtmánek
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[ message continues ]

there have been indeed know reports of these "fake" hangs. basically the counter
logic for these newer devices reports hangs too quickly for 10/100 speeds while
they actually are not occurring (the line is just very busy).

The fix for this has been to grant more time for the hardware to recover from this
busy state. I'll make sure to check if the upstream drivers are OK in this regard.

you can try our out-of-tree e1000 driver (7.6.x or newer) which should work OK for
you with respect to this problem. Please give that a try.

Cheers,

Auke
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[ message continues ]

unfortunately, the 7.6.9 driver cannot be compiled with 2.6.24-rc3-git2
kernel due to compilation errors.

-- 
Lukáš Hejtmánek
-

[ message continues ]

but the in-kernel version of e1000 supports the ich8 lan device just fine and can
be builtin. also this kernel has the first release of e1000e which supports the
ich9 onboard lan device.

Auke
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[ message continues ]

I'm afraid, I'm missing the point as you have stated that in-kernel drivers
have problem with suspicious board hang...

-- 
Lukáš Hejtmánek
-

[ message continues ]