Questions tagged [dmesg]
The dmesg tag has no usage guidance.
62
questions
0
votes
1
answer
76
views
kernel messages are complained about memory.inspite all DIMM cards was replaced
we have few DELL machines ( with RHEL 7.6) , and as we replaced the DIMM cards on machines because the Erros that we seen from kernel messages
after some time we checked again the kernel messages and ...
- 559
1
vote
1
answer
48
views
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 ...
- 559
0
votes
1
answer
318
views
kernel message + how to know if we need to replace the DIMM based on kernel messages
we have RHEL 7.6 server , and we noticed about the following kernel messages.
[1065085.048872] EDAC sbridge MC0: PROCESSOR 0:406f1 TIME 1676989040 SOCKET 0 APIC 0
[1065086.052107] EDAC MC1: 0 CE ...
- 559
0
votes
0
answers
146
views
What does this disk message in dmesg means？
[Mon Jan 30 19:43:19 2023] ata4: COMRESET failed (errno=-16)
[Mon Jan 30 19:43:19 2023] ata4: hard resetting link
[Mon Jan 30 19:43:06 2023] ata4: link is slow to respond, please be patient (ready=0)
[...
- 1
0
votes
0
answers
96
views
Cannot mount EBS made using another EC2 instance
I previously made an Amazon EC2 instance and stored some data onto an elastic block storage volume (150 GB sc1). I have since detached the volume and attached it onto another EC2 instance. However, ...
1
vote
1
answer
2k
views
"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 ...
- 296
0
votes
1
answer
577
views
Dmesg to real timestamp
I would like convert my Centos 6.10 dmesg in real timestamp, how do I do this? I tried with -T but no luck. I have long entry like (1630230907.320:2)
0
votes
1
answer
225
views
dmesg tells 1G out of 128G available?
I have a 128GB RAM server, kernel 4.18.0-305.7.1.el8_4.x86_64,
"dmesg | grep Memory" outputs as follows:
[ 0.000000] Memory: 1282732K/133708404K available (12293K kernel code, 2225K ...
- 3
6
votes
1
answer
595
views
How does dmesg differentiate between different log levels?
How does dmesg differentiate between different log levels?
I can execute dmesg -l err to see all the error logs but when I look at the data with just dmesg or just cat the /var/log/dmesg file, there ...
- 181
1
vote
0
answers
692
views
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 ...
- 213
0
votes
2
answers
467
views
What's the normal order of messages in dmesg when a USB HDD is failing?
I have a USB hard drive attached to a Debian GNU/Linux server. I'm trying to format it (NTFS), with this command:
# mkntfs -v /dev/sdd1
which takes a few hours, because it checks the disk too. While ...
- 420
0
votes
2
answers
217
views
What driver created this dmesg message?
Usually, dmesg entries are prepended by the name of the driver that is posting the message to the buffer. This makes it easy to track down where the error is coming from and how to fix it. In my case, ...
1
vote
0
answers
150
views
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 ...
- 559
0
votes
0
answers
79
views
dmesg -T + how to expand dmesg info in order to verify history details
we have rhel 7.2 server
from dmesg -T we see only the current date - Mon Jan 11
and not history dates as jan 10 , or less then jan 10
dmesg -T
[Mon Jan 11 12:02:53 2021] Initializing cgroup subsys ...
- 49
0
votes
1
answer
92
views
cat an file programs fail to acess a file but vi works properly (Debian)
I have getting some problems with my system after a bad reset via ctrl+alt+del. Since then errors related to ACPI and ata6 are reported. Trying to get a solution to this (in a savage way:I am n00b), I ...
- 103
1
vote
1
answer
5k
views
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-...
- 559
0
votes
1
answer
169
views
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 ...
- 113
0
votes
0
answers
709
views
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 ...
- 461
1
vote
0
answers
733
views
how to identify kernel problems from message log file
dear friends and colleges
we notice about unexpected freezed of one of our critical linux machines server linux - version - 7.2
this is VM machines
and now I am working to understand what the root ...
- 461
3
votes
2
answers
5k
views
Prevent kernel messages from appearing in dmesg
Is it possible to prevent kernel messages from appearing in dmesg output?
E.g. I am running software that terminates PPPoE tunnels. One of the features it provides is the ability to set custom ...
- 171
0
votes
2
answers
1k
views
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 ...
- 461
0
votes
1
answer
244
views
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-...
- 163
0
votes
1
answer
3k
views
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 ...
- 181
1
vote
0
answers
253
views
How should I disable application logs into syslog? [duplicate]
I have many services that floods syslog file in /var/log with tons of messages. Sometime server restart all of a sudden and when I created a ticket about the issue, they said that the problem is ...
- 583
3
votes
0
answers
1k
views
how to find which memory stick error
There is a Inspur SA5212SC server involve memory error. In dmesg output I got some error:
{16}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1
{16}[Hardware Error]: APEI ...
- 31
0
votes
1
answer
127
views
TCPv6 RST sent | drivers/common/payload2/tb_tcpv6_conn.c:246
Am having a strange issue with my AWS Linux Box, since some time am having some up dans down with the sites am hosting.
Randomly for a few mins, the sites are unavailable.
In the dmesg log I find ...
-1
votes
2
answers
2k
views
Linux + how to know why Linux machine is hung from the messages on the console
As in the picture below, my Linux machine was hung and I couldn't login.
How do I identify the reason for the "hang", according to the messages on the console?
I searched /var/log/messages for more ...
- 43
3
votes
1
answer
794
views
High load average, but low CPU/IO figures - how to diagnose? (dmesg output included)
We have a Hadoop cluster where arbitrary data nodes will lock up. This is usually pre-ceded by ever-increasing load averages, with CPU and IOwait remaining practically non-existant. The use case for ...
- 183
7
votes
1
answer
14k
views
Running dmesg on Docker results in "dmesg: read kernel buffer failed: Permission denied"
In order to debug why this issue occurs the following command is run on a container:
docker run -it <dockerImageName> dmesg
results in:
dmesg: read kernel buffer failed: Permission denied
...
- 5,921
0
votes
0
answers
361
views
Is my disk gone?
My linux workstation just recently crashed. It now boots into a login screen and from there, if I log in, it logs me back out. Also, the resolution is much lower than it used to be. I think that it ...
- 101
1
vote
0
answers
214
views
server large jiffies during boot(Calibrating delay loop...)
The server behaves abnormal, I checked the dmesg log , found the jiffies is very large during boot, between Detected cpu and Calibrating delay loop..
reboot the server does not solve the problem. ...
- 21
1
vote
0
answers
1k
views
wired dmesg output and high cpu load
I have like 50 Linux servers with the same hardware and kernel,
but recently found that some of them suffers from high CPU load, runs very slowly, top and ps show TIME column with impossible large ...
- 21
17
votes
1
answer
24k
views
How to disable perf subsystem in Linux kernel?
I'm running some benchmarks. My benchmark runner monitors the dmesg buffer between experiments, looking for anything which could impact performance. Today it threw this up:
[2015-08-17 10:20:14 ...
- 963
1
vote
1
answer
3k
views
Radeon DVI errors filling logs
These error just fill my logs:
[316094.848311] [drm:radeon_dvi_detect] *ERROR* DVI-I-1: probed a monitor but no|invalid EDID
[316104.895726] [drm:drm_edid_block_valid] *ERROR* EDID checksum is ...
- 605
1
vote
2
answers
846
views
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 ( ...
- 11
4
votes
1
answer
16k
views
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message
One of my server (Ubuntu 12.04, 16CPU, 32GB RAM) runs the app section of my website (Nginx 1.1.19, PHP5-FPM, Php 5.3.10, Symfony2 Web Framework)
Suddenly, users started getting HTTP 5** Errors. When ...
- 61
2
votes
1
answer
2k
views
php5-fpm invoked oom-killer
One of my server (Ubuntu 12.04, 16CPU, 32GB RAM) runs the app section of my website (Nginx 1.1.19, PHP5-FPM, Php 5.3.10, Symfony2 Web Framework)
Suddenly, users started getting HTTP 5** Errors. When ...
- 61
4
votes
1
answer
4k
views
kernel:EDAC MC0 spam in dmesg
I have spam in dmesg containing:
kernel:EDAC MC0: UE page 0x0, offset 0x0, grain 1073741824, row 3, labels ":": i3200 UE
Any idea what suppose to be wrong?
here are loaded modules:
# lsmod | grep ...
- 826
-1
votes
1
answer
2k
views
Nginx Reverse Proxy Segfault on High Traffic
Recently my load balancer with Nginx rev proxy showing the following error messages on /var/log/dmesg:
[6278902.558300] nginx[15683]: segfault at ffffffffffffffff ip 0000000000457b99 sp ...
- 1
3
votes
2
answers
2k
views
I/O Errors but no smart or ZFS errors
I'm having trouble to identify a problem for a friend of my. He is running ZFS on Linux with the Debian distribution. We are getting these entries into the dmesg.
[273044.834151] mpt2sas0: log_info(...
- 31
20
votes
4
answers
18k
views
dmesg time vs system time time isn't correct
I hope that here is somebody that can help me with this strange problem.
I think that i know why it is happening but i don't know how to solve it. Maybe it is because the BIOS time isn't set correct ...
- 343
0
votes
2
answers
934
views
How to find out previous start-up time, so one can read `/var/log/dmesg.0` log?
That should be a quick one:
I'm running a small server, and one day discovered, that one of the LXC containers inside is down. I started it again, but I want to find out, for how long it was down.
I ...
- 720
4
votes
1
answer
623
views
Same hard drive problems in dmesg on several servers
We have a couple of these SuperMicro MicroCloud units.
In total we've got 16 servers (2x8) which all randomly spew these messages in dmesg:
[4661350.802707] ata2.00: failed command: WRITE FPDMA ...
- 51
0
votes
1
answer
11k
views
SMART and exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 [closed]
looking at the logs I see several errors. The smart status is PASSED, but even if It is verbose It isn't clear what is going on. Should the disk be replaced?
Attached dmesg and smart logs
# dmesg
...
- 31
1
vote
1
answer
4k
views
allocation failed: out of vmalloc space - use vmalloc=<size> 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=<size> to increase size.
How do I increase ...
- 113
3
votes
2
answers
3k
views
nf_conntrack complaints in dmesg
While investigating complains on bad HTTP server performance, I've discovered these lines in dmesg of my Xen XCP host that contains a guest OS with said server:
[11458852.811070] net_ratelimit: 321 ...
- 2,423
0
votes
2
answers
3k
views
Ext4 self errors after some time on CentOS 5.8 64-bit
I get such warnings in dmesg:
EXT4-fs error (device md2): mb_free_blocks: double-free of inode 0's block 602619328(bit 15808 in group
EXT4-fs error (device md2): mb_free_blocks: double-free of inode ...
- 568
17
votes
5
answers
88k
views
What do these disk errors in syslog mean?
I just rebooted my monitoring server for the first time in a while, and the following starting filling the screen:
Jul 11 23:52:30 monit kernel: [ 25.255908] ata1.00: exception Emask 0x0 SAct 0x0 ...
- 4,366
2
votes
2
answers
213
views
How do I find out my CD ROM hardware specifics on FreeBSD?
I can usually use dmesg soon after bootup to display hardware info that my kernel loads. After my system has been up for a while however, dmesg no longer produces anything of value concerning hardware....
- 474
15
votes
6
answers
40k
views
Linux Centos with dmesg timestamp
I would like to read my Centos 5.x dmesg with timestamp, how do I do this?
- 1,876