This bug should be a top priority because people will suffer from it as soon as
they reboot
their 14.04 LTS with an Intel Gigabit NIC and the "current" Utopic kernel
(3.16.0-48-generic).
I had the same problem with HP ProLiant DL380e Gen8 which an Intel I350 Gigabit
NIC
(Hewlett-Packard Company Ethernet 1Gb 4-port 366i Adapter)
It was hard to get a shell with 30-50% packets drop and igb driver resetting
ALL NICs...
"blind-typing" on the shell and wait 1-2 minutes to get the output... of dmesg
;-)
I updated the kernel of 14.04 LTS from Utopic to Vivid and everything is
working again.
Workaround is:
screen -S kernel
apt-get -y purge linux-{headers,image,image-extra}-3.16.0-48-generic
apt-get -y install linux-image-generic-lts-vivid linux-headers-generic-lts-vivid
reboot
Output of dmesg:
igb 0000:02:00.1 em2: igb: em2 NIC Link is Up 1000 Mbps Full Duplex, Flow
Control: RX
igb 0000:02:00.1: Detected Tx Unit Hang
Tx Queue <3>
TDH <0>
TDT <0>
next_to_use <4>
next_to_clean <0>
buffer_info[next_to_clean]
time_stamp <100039540>
next_to_watch <ffff880230b0e030>
jiffies <1000397b6>
desc.status <0>
igb 0000:02:00.1 em2: Reset adapter
igb 0000:02:00.2 em3: Reset adapter
igb 0000:02:00.0 em1: Reset adapter
igb 0000:02:00.0 em1: igb: em1 NIC Link is Up 100 Mbps Full Duplex, Flow
Control: RX
igb 0000:02:00.1 em2: igb: em2 NIC Link is Up 1000 Mbps Full Duplex, Flow
Control: RX
igb 0000:02:00.1: Detected Tx Unit Hang
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https://bugs.launchpad.net/bugs/1492146
Title:
igb Detected Tx Unit Hang
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