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https://bugs.launchpad.net/bugs/1812410
Title:
Intel x550 not negotiating to 10Gb on x299 chipset
Status in linux package in Ubuntu:
Incomplete
Bug description:
I am having an issue with this particular machine auto negotiating
10Gb. The onboard LOM will only negotiate to 1Gb. If I run `ethtool -s
<device> advertise 0x1000`, the machine will delink and then negotiate
to 10Gb and work as expecting. Rebooting the machine (or unplugging
network cable) will cause it to negotiate to 1G again resulting in
having to run the ethtool command again.
This is what I have tried:
Tried different cable from confirmed working machine that auto negotiates to
10Gb.
Tried upgrading ixgbe driver to latest (5.5.3)
Tried upgrading X550 firmware.
I put an Intel x540-T1 card in the machine and that card works properly and
negotiates to 10Gb automatically. Move the cable to the LOM x550, and it still
negotiates to 1Gb.
I also tried loading a live version of Fedora 29 (Kernel 4.18) with same
exact symptoms.
We have several other machine negotiating fine on the same exact
switch. I have tried those cables to test this problematic machine
with same result as above.
We have a machine that is pretty similar in hardware that is not
exhibiting this issue. It is an ASUS x99 motherboard, with the same
LOM Intel x550 card, running on 16.04.
The machine that is causing problems is an Asus x299 motherboard with
the Intel x550 LOM card running 18.04 (16.04 won't work on the x299
chipset for some reason). I have a suspicion that it could potentially
be related to the x299?
The only way I have been able to get this problematic machine to
negotiate to 10Gbps automatically is by plugging a cable directly from
the LOM x550 of the problematic machine to another machines 10Gb
network card. Doing that, the problematic machine will negotiate
properly to 10Gb.
I'm trying to find another 10Gb switch to test with to see if it could
be unique to this combination of switch and machine. However, I'm
reluctant to blame it on the switch since we have about several other
machine working perfectly fine on the switch (some with the same exact
x550 LOM).
Other notes:
https://serverfault.com/questions/949006/intel-x550-not-negotiating-
to-10gb?noredirect=1#comment1233436_949006
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