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Groups > linux.debian.kernel > #67129

Bug#961130: ethtool can read DOM values

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Package: ethtool
Version: 1:4.19-1
Severity: important
The command ethtool -m  is unable to read the transceiver DOM values.

Here is a transcript:

root@localhost:~# ethtool -i ens2f0
driver: mlx5_core
version: 5.0-0
firmware-version: 14.25.8000 (DEL2420110034)
expansion-rom-version: 
bus-info: 0000:65:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes

root@localhost:~# ethtool -m ens2f0 
 Identifier : 0x03 (SFP)
 Extended identifier : 0x04 (GBIC/SFP defined by 2-wire interface ID)
 Connector : 0x07 (LC)
 Transceiver codes : 0x10 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
 Transceiver type : 10G Ethernet: 10G Base-SR
 Encoding : 0x06 (64B/66B)
 BR, Nominal : 10300MBd
 Rate identifier : 0x00 (unspecified)
 Length (SMF,km) : 0km
 Length (SMF) : 0m
 Length (50um) : 80m
 Length (62.5um) : 20m
 Length (Copper) : 0m
 Length (OM3) : 300m
 Laser wavelength : 850nm
 Vendor name : Pureoptics
 Vendor OUI : 00:00:00
 Vendor PN : EX-SFP-10GE-SR
 Vendor rev : B4
 Option values : 0x00 0x1a
 Option : RX_LOS implemented
 Option : TX_FAULT implemented
 Option : TX_DISABLE implemented
 BR margin, max : 0%
 BR margin, min : 0%
 Vendor SN : M4787212
 Date code : 200222
 Optical diagnostics support : Yes
 Laser bias current : 0.000 mA
 Laser output power : 0.0000 mW / -inf dBm
 Receiver signal average optical power : 0.0000 mW / -inf dBm
 Module temperature : 0.00 degrees C / 32.00 degrees F
 Module voltage : 0.0000 V
 Alarm/warning flags implemented : Yes
 Laser bias current high alarm : Off
 Laser bias current low alarm : Off
 Laser bias current high warning : Off
 Laser bias current low warning : Off
 Laser output power high alarm : Off
 Laser output power low alarm : Off
 Laser output power high warning : Off
 Laser output power low warning : Off
 Module temperature high alarm : Off
 Module temperature low alarm : Off
 Module temperature high warning : Off
 Module temperature low warning : Off
 Module voltage high alarm : Off
 Module voltage low alarm : Off
 Module voltage high warning : Off
 Module voltage low warning : Off
 Laser rx power high alarm : Off
 Laser rx power low alarm : Off
 Laser rx power high warning : Off
 Laser rx power low warning : Off
 Laser bias current high alarm threshold : 0.000 mA
 Laser bias current low alarm threshold : 0.000 mA
 Laser bias current high warning threshold : 0.000 mA
 Laser bias current low warning threshold : 0.000 mA
 Laser output power high alarm threshold : 0.0000 mW / -inf dBm
 Laser output power low alarm threshold : 0.0000 mW / -inf dBm
 Laser output power high warning threshold : 0.0000 mW / -inf dBm
 Laser output power low warning threshold : 0.0000 mW / -inf dBm
 Module temperature high alarm threshold : 0.00 degrees C / 32.00 degrees F
 Module temperature low alarm threshold : 0.00 degrees C / 32.00 degrees F
 Module temperature high warning threshold : 0.00 degrees C / 32.00 degrees F
 Module temperature low warning threshold : 0.00 degrees C / 32.00 degrees F
 Module voltage high alarm threshold : 0.0000 V
 Module voltage low alarm threshold : 0.0000 V
 Module voltage high warning threshold : 0.0000 V
 Module voltage low warning threshold : 0.0000 V
 Laser rx power high alarm threshold : 0.0000 mW / -inf dBm
 Laser rx power low alarm threshold : 0.0000 mW / -inf dBm
 Laser rx power high warning threshold : 0.0000 mW / -inf dBm
 Laser rx power low warning threshold : 0.0000 mW / -inf dBm
As you can see all mesuring values are zeros.
I am using Debian GNU/Linux 10 (buster), kernel 4.19.0-9-amd64 #1 SMP Debian 4.19.118-2 (2020-04-29) x86_64 GNU/Linux and libc6 2.28-10

FYI, I get correct values using SystemRescueCD 6 (ethtool 5.0, kernel 4.19.34-1-lts) on this same hardware, using the same command.

Regards,--
Yannis Aribaud

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Thread

Bug#961130: ethtool can read DOM values "Yannis Aribaud" <bugs@d6bell.net> - 2020-05-20 15:40 +0200
  Bug#961130: ethtool can read DOM values Ben Hutchings <ben@decadent.org.uk> - 2020-05-21 04:40 +0200
  Processed: Re: Bug#961130: ethtool can read DOM values "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-05-21 04:40 +0200
  Bug#961130: ethtool can read DOM values Bjørn Mork <bjorn@mork.no> - 2020-05-21 11:40 +0200
    Bug#961130: ethtool can read DOM values Ben Hutchings <ben@decadent.org.uk> - 2020-05-21 22:40 +0200

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