I am having an issue where my link comes up as 10Mb/s if I plug in the
cable after the system has booted, no matter what I connect to. Tested with
kernel 4.7.8 and 4.14.73. If the cable is connected during boot the correct
speed of 1000Mb/s is observed. I have multiple instances of this hardware
setup and it happens with all of them reliably.
Here is some info:
driver: e1000e
version: 3.2.6-k
firmware-version: 0.8-4
expansion-rom-version:
bus-info: 0000:00:1f.6
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no
--------------------------------------------------------
MAC Registers
-------------
0x00000: CTRL (Device control register) 0x40180240
Endian mode (buffers): little
Link reset: normal
Set link up: 1
Invert Loss-Of-Signal: no
Receive flow control: disabled
Transmit flow control: disabled
VLAN mode: enabled
Auto speed detect: disabled
Speed select: 1000Mb/s
Force speed: no
Force duplex: no
0x00008: STATUS (Device status register) 0x40080000
Duplex: half
Link up: no link config
TBI mode: disabled
Link speed: 10Mb/s
Bus type: PCI
Bus speed: 33MHz
Bus width: 32-bit
0x00100: RCTL (Receive control register) 0x04008002
Receiver: enabled
Store bad packets: disabled
Unicast promiscuous: disabled
Multicast promiscuous: disabled
Long packet: disabled
Descriptor minimum threshold size: 1/2
Broadcast accept mode: accept
VLAN filter: disabled
Canonical form indicator: disabled
Discard pause frames: filtered
Pass MAC control frames: don't pass
Receive buffer size: 2048
0x02808: RDLEN (Receive desc length) 0x00001000
0x02810: RDH (Receive desc head) 0x00000000
0x02818: RDT (Receive desc tail) 0x000000F0
0x02820: RDTR (Receive delay timer) 0x00000000
0x00400: TCTL (Transmit ctrl register) 0x3103F0F8
Transmitter: disabled
Pad short packets: enabled
Software XOFF Transmission: disabled
Re-transmit on late collision: enabled
0x03808: TDLEN (Transmit desc length) 0x00001000
0x03810: TDH (Transmit desc head) 0x00000000
0x03818: TDT (Transmit desc tail) 0x00000000
0x03820: TIDV (Transmit delay timer) 0x00000008
PHY type: unknown
--------------------------------------------------------
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 10Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
Running a command like "ethtool -s eth5 advertise 20" or "ethtool -s eth5
advertise 2c" causes the link to go down and come back up with the right
speed. If I then remove the cable for a few seconds and put it back in the
speed will go back to 10Mb/s. Quicker than that and it seems to stay at
1000Mb/s.
Here is a dmesg with the cable out at boot and then me plugging it in after:
[root@trx-r6 /]# grep -ri 1000e a
[ 12.836934] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 12.836936] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 12.841135] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec)
set to dynamic conservative mode
[ 13.029402] e1000e 0000:00:1f.6 0000:00:1f.6 (uninitialized): registered
PHC clock
[ 13.107349] e1000e 0000:00:1f.6 eth5: (PCI Express:2.5GT/s:Width x1)
00:13:f2:a0:01:85
[ 13.107352] e1000e 0000:00:1f.6 eth5: Intel(R) PRO/1000 Network
Connection
[ 13.107408] e1000e 0000:00:1f.6 eth5: MAC: 12, PHY: 12, PBA No:
FFFFFF-0FF
[ 2957.722516] e1000e: eth5 NIC Link is Up 10 Mbps Full Duplex, Flow
Control: Rx/Tx
[ 2957.722521] e1000e 0000:00:1f.6 eth5: 10/100 speed: disabling TSO
Cable in the whole time during boot:
[ 12.273114] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 12.273116] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 12.276161] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec)
set to dynamic conservative mode
[ 12.375477] e1000e 0000:00:1f.6 0000:00:1f.6 (uninitialized): registered
PHC clock
[ 12.458574] e1000e 0000:00:1f.6 eth5: (PCI Express:2.5GT/s:Width x1)
00:13:f2:a0:01:85
[ 12.458578] e1000e 0000:00:1f.6 eth5: Intel(R) PRO/1000 Network
Connection
[ 12.458631] e1000e 0000:00:1f.6 eth5: MAC: 12, PHY: 12, PBA No:
FFFFFF-0FF
[ 133.384512] e1000e: eth5 NIC Link is Up 1000 Mbps Full Duplex, Flow
Control: Rx/Tx
Any ideas?
Regards,
--
Paul
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