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Questions tagged [dmesg]

62 questions
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Wrong date/time in dmesg

we have this strange issue. We use perl script for human-readable time-stamp in dmesg (taken from http://linuxaria.com/article/how-to-make-dmesg-timestamp-human-readable) and I also tried this one (…
Hudsik
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allocation failed: out of vmalloc space - use vmalloc= to increase size

I have a problem with the following error appearing upon sending a dmesg command to my server: allocation failed: out of vmalloc space - use vmalloc= to increase size. How do I increase vmalloc size? Here are some server specs: root@h3 [~]#…
petru
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APIC error on CPU1: 60(60) in dmesg what does it mean?

APIC error on CPU1: 60(60) in my dmesg log. What does it mean? Should I be worried! Is this some hardware issue?
B14D3
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Does this dmesg output indicate a failed network card on Red Hat Enterprise?

Having an issue with a network card on a server today. If I restart the service via "service network restart" the card never comes back, the command prompt just hangs. I suspect it's a bad network card but wanted to run the output of dmesg by…
Bourne
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why dmesg | grep Memory gives two different physical memory amounts?

I am monitoring physical memory in a server I administer, and my hardware provider told me they had increased physical memory size to 4Gb... However, using several tools (free -m; top; dmesg | grep Memory; grep MemTotal /proc/meminfo I discovered…
Javier Novoa C.
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RHEL + how to capture fresh kernel message without machine reboot

here is example from dmesg output from important production server ( RHEL 7.2 - DELL machine HW ) as we can see the sde disk in server is dying [Wed Jun 30 11:24:58 2021] sd 0:2:4:0: [sde] tag#0 FAILED Result: hostbyte=DID_OK…
King David
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"Hardware Error" popping up in dmesg

I am sporadically (twice in over a month) seeing worrying errors like: [757706.327447] mce: [Hardware Error]: Machine check events logged [757706.327450] [Hardware Error]: Corrected error, no action required. [757706.327453] [Hardware Error]: CPU:1…
ZioByte
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Is there a way to read dmesg.old with absolute timestamps

Is there a way, using dmesg or otherwise to see the data in /var/log/dmesg.old with an absolute timestamp? I'm trying to get the same effect as dmesg -T but on older data. I'm using Amazon Linux AMI release 2018.03. The -F option for opening a…
Uberhumus
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what are the kernel messages about "Disabling DIF Type 2 protection" means

On our RHEL 7.2 server we saw a strange kernel messages with lines as: Disabling DIF Type 2 protection ***10DIGITS*** 512-byte logical blocks: (2.00 TB/1.81 TiB) Above messages are relevant for all disks in the server ( DELL HW MACHINE ) Example of…
King David
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how to verify status of TCP Segmentation Offloading

we do the following on linux rhel machines ethtool -K ifcfg-478476 tso off now lets say that we want to verify the settings how to do the check with ethtool or other cli? we try ethtool -k ifcfg-478476 | grep -i tso but we not get status any idea…
King David
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How can I set the default time format for dmesg?

I use dmesg in Ubuntu heavily. I like the iso time format but I hate typing it out every time, so I use something like this in my .bashrc to set the default time format for dmesg: # Setup alias for dmesg alias dmesg="/bin/dmesg…
dgreene
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redhat + Filesystem error recorded from previous + mount: IO failure

we install new physical machine with 10 disks ( except the OS disk ) each disk is actuality hold HDFS file system after we installed the Linux machine with hadoop kit we start the datanode and we noticed about many errors from dmesg as: EXT4-fs…
shalom
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linux redhat + how to resolve the issue about Invalid response packet from host

we have thousand of the following message in /var/log/messages we also have strange issue that machine restart each of couple dayes what need to do in order to avoid these messages? Apr 25 00:08:31 app_linux02 avahi-daemon[953]: Invalid response…
shalom
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dmesg errors not showing in ddrescue

We had a disk in a raid go bad and we are suspicious another one might have minor errors. So to be safe we are trying to recover both disks using ddrescue. The various help pages recommend a two-to-three pass copy, first doing a no-split logged…
Scott
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Meaning of "GHES: HEST is not enabled!" in dmesg

After reboot of a SuSE 12 host I looked into dmesg and came across the info GHES: HEST is not enabled! GHES obviously means "APEI Generic Hardware Error Source support". Should GHES/HEST be enabled? What about the benefit of it? How to achieve…
MarkHelms
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