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Questions tagged [dmesg]

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1
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1answer
39 views

No root permission in a docker container image

I test a Docker container (created from Nvidia CUDA image) started with the command: docker run -i -t xxxxxx /bin/bash I can see the root prompt, but still don't have privileges for some operations; ...
0
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1answer
43 views

NVIDIA usable memory 4GB instead of 6GB?

I have an NVIDIA 1060 with 6GB of memory in my laptop. I am on Linux Mint 19.1 Cinnamon 64-bit with NVIDIA drivers version 390 official: You can see for yourself, but I know that from Dell support, ...
0
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2answers
49 views

How can I configure a running kernel to output dmesg info directly to the tty, without involving any userspace programs?

There are a large variety of questions floating around the 'net from people who want to watch the output of dmesg in real time. All the suggestions and answers involve using dmesg -w, tail, journalctl ...
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0answers
40 views

Difficult tainted kernel message - anyone know the source?

It lists so many things that I can not tell the source. I see iee80211 so I thought it might be a network packet, but than I see IRQ and also modules being listed so it is really convulated. Ubuntu ...
0
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1answer
41 views

how to understand the dmesg

we have redhat machine version 7.2 and each machine have disks as sdb sdc sdd sde sdf in the dmesg report we get the following [873080.996700] Buffer I/O error on device sdf, logical block ...
0
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1answer
57 views

Docker container is killed during performance tests

I need to understand why docker container is being killed during processing. Short background: we're running performance tests in RH machine. (Machine has 64GB RAM, 16 CPU) after 20 hours of run or ...
1
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0answers
53 views

2 LAN cables connected, 1 PCI bus and vice versa

When booting my pc with 2 LAN cables connected only one interface is registered. 03:00.0 and 04:00.0 $ dmesg | grep -P '0(3|4):00.0' [ 0.180140] pci 0000:04:00.0: [11ab:4362] type 00 class ...
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0answers
52 views

dmesg + Reset adapter - what is mean - is it problem

from the dmesg we get the following note - e1000 0000:02:01.0 eth12983746: Reset adapter is it mean that we have problem with eth card ? and because that adapter is restart ? [440924.709103] <...
0
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1answer
84 views

Which kernel .config option causes “Magic number: 1:252:3141” on dmesg?

Here it is in context: [ 0.507474] i8042: PNP: No PS/2 controller found. [ 0.507568] mousedev: PS/2 mouse device common for all mice [ 0.507683] device-mapper: uevent: version 1.0.3 [ 0....
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0answers
126 views

Kernel messages in messages log have wrong timestamp. How can I correct CLOCK_MONOTONIC drift without rebooting?

We have a bunch of linux nodes out in the field running a 2.6 kernel. hostname:~# uname -a Linux hostname 2.6.23.1 #1262 Fri Nov 29 07:11:22 EST 2013 armv5teb GNU/Linux Most of them have an uptime ...
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0answers
58 views

Linux kernel networking Ubuntu debug message not shown with printk/pr_debug?

I have recompiled the Linux kernel on Ubuntu and now upgraded to 4.17.6. I need to modify the TCP/IP stack parts, in specific one of the congestion control algorithms (eg. Vegas). After successful ...
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0answers
155 views

busybox dmesg old timestamp format

I'm working on an arm board running an old kernel(3.14.29) I trying to to get the dmesg output and pass it to the bootgraph.pl to generate an SVG of kernel boot sequence. However after passing the ...
0
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1answer
334 views

How to read usb-storage message in dmesg?

When inserting a USB pen drive, I get the following message [20236.720694] usb-storage 1-1.2:1.0: USB Mass Storage device detected [20236.721212] scsi host6: usb-storage 1-1.2:1.0 I think usb-...
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0answers
388 views

how to know why Linux redhat machine performed reboot

we have cluster with redhat machines version 7.2 on pluto05 machine we saw that machine rebooted before one day uptime 13:51:06 up 1 day, 1:46, 2 users, load average: 0.30, 0.14, 0.08 and from ...
1
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0answers
62 views

What are the possible cause of “__rtc_set_alarm: err=-22” error message in dmesg?

What are the possible cause of "__rtc_set_alarm: err=-22" error message in dmesg? I am seeing this in my log files but I do not try to set the alarm or schedule it anywhere.
0
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1answer
347 views

Understanding dmesg warning

Could anyone give some insight on what these warnings mean in the below dmesg log? Do they mean that the atl1c module is failing to load completely or merely a warning? Any information that helps ...
1
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2answers
125 views

Unusal boot time of one hour, where to find logs [closed]

I have an unusual time of boot of aprox one hour on a RPI. After one minute I can ping the device, but I can't do an ssh after until 1 hour. I don't know where to find logs to hep me. I checked /var/...
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0answers
908 views

How to get DisplayLink to work with Debian?

I have have successfully installed the necessary drivers as outlined: https://github.com/AdnanHodzic/displaylink-debian/blob/master/post-install-guide.md I do have UEFI installed on Intel NUC (...
2
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1answer
779 views

Toggling visibility of segmentation fault messsages in dmesg

When applications segfault, I generally see messages like this in dmesg: pstree[25678]: segfault at 0 ip 00007f58be0b3ae4 sp 00007ffe65b700a0 error 4 in libc-2.24.so[7f58be04d000+195000] However, I ...
0
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4answers
8k views

Log iptables events on centos 7

I have got iptables on my centos 7. My firewalld is disabled. How can I log my iptables events? On debian it is dmesg option but I don't know how to set it on centos. I want to log all of my iptables ...
0
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1answer
652 views

Is it possible to tell when /dev/kmsg has been ratelimited?

The Linux kernel developers decided by default to ratelimit messages to /dev/kmsg. This was because they did not like the amount of messages written by systemd, particularly when debug is passed on ...
2
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0answers
181 views

alloc_contig_range test_pages_isolated failed

On an embedded linux system (arm cortex a9 imx.6), the hmi program froze at a certain time. At the same time there was the following log in /var/log/messages es well with "dmesg": alloc_contig_range ...
2
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1answer
339 views

What are 'dmesg' failure messages?

When I'm executing the dmesg command on my RHEL 7.4 server, I'm noticing following failure messages: [root@localhost ~]# dmesg | grep -i fail [ 0.984930] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND)...
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0answers
107 views

Very long ubuntu startup time

I've just installed Ubuntu (on an SSD) and startup takes over two minutes. I've checked "dmesg" and found a clear 90 seconds process that probably shouldn't be there. [ 13.831788] audit: type=1400 ...
0
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1answer
2k views

How to increase dmesg buffer size in CentOs 7.2?

I am getting following message in dmesg: "systemd-journald[414]: /dev/kmsg buffer overrun, some messages lost." How to increase dmesg log buffer size to view all debug messages? Any help will be ...
0
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1answer
621 views

Parrotsec OS unable to run apt-get and got some errors with dmesg

I install parrot OS and when installing a package i found this error. It is the the same when I try to install any package. Reading package lists... Error! W: Not using locking for read ...
3
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0answers
158 views

sda:sda1 keeps showing up in dmesg

dmesg logs is 'filled with' the following : [613051.997981] sdf: sdf1 [613052.068773] sdf: sdf1 [613352.060804] sdc: sdc1 [613653.176468] sdc: sdc1 This just continues on and on about every 300 ...
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1answer
82 views

how to identify if raid1 or raid mirror configure on OS disk

we want to verify if raid1 is configured on out linux machine so we found the answer on - https://serverfault.com/questions/110843/how-to-determine-if-a-centos-system-is-raid-1 but from the output - ...
0
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0answers
941 views

What to do if I get this error: `mce: [Hardware Error]: PROCESSOR 0:306c3 TIME 1511138090 SOCKET 0 APIC 0 microcode 22`?

I have an Intel i7 laptop. While running two VirtualBox VMs and while training a neural network with TensorFlow, my KDE desktop told me with a popup that I got the following message: Message from ...
1
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1answer
372 views

Can I restrict dmesg to a group?

I understand that, for security reasons (like address randomization), it makes some sense to not let every user be able to read the kernel's dmesg. Linux allows one to restrict dmesg to the root user ...
0
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2answers
694 views

dmesg with / without sudo on Debian / Mint

I noticed this difference some time ago, but until now, I didn't bother to ask, why is that? On Linux Mint 18 (Ubuntu-based) I can run dmesg without using sudo. On GNU/Linux Debian 9 I must use sudo ...
1
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0answers
946 views

Trying to fix these dmesg errors Debian Stretch

Since updating to Debian Stretch I'm seeing these kernel messages while system boots up (in prior version's they did not show up at all): dmesg -k -l err,warn [ 0.008642] ENERGY_PERF_BIAS: Set to '...
3
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2answers
157 views

HGST 6TB Drive not recognized

I have a HP Proliant Microserver Gen8 running Debian Stretch. I installed a HGST 6TB HDD in Slot 1 and when I boot the device does not show. dmesg output: [ 8.159512] ata1: SATA link up 6.0 Gbps (...
0
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1answer
276 views

Buffer I/O error on /dev/sda2, running fsck.hfsplus returns OK

At the moment, I'm mounting a USB hard drive running HFS+ on a Raspberry Pi 3 at boot to be writable. Not 100% sure what I did, but the drive is suddenly throwing up errors such as Buffer I/O error on ...
0
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1answer
67 views

Storing Huge Data in Linux Kernel

I have a customized Linux Kernel which prints to dmesg and syslog (using printk) some additional information about each received MP-TCP packet in the system. Things work perfectly, however I am ...
0
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0answers
399 views

Logging Information from Linux Kernel

I have modified the source code of a Vanilla Linux Kernel to output some timing information regarding some operations in the TCP layer. Currently, I am using printk command to print these results. ...
11
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1answer
8k views

dmesg: read kernel buffer failed: Permission denied

Since recently Debian has changed the default behavior for dmesg and I cannot use it simply from my local user. % dmesg dmesg: read kernel buffer failed: Operation not permitted Same goes for: % ...
3
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1answer
4k views

How to filter the dmesg log to see only the errors

I am in ubuntu, when I write dmesg the error messages appear in red, how could I print in the console only those?
0
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1answer
185 views

How to get segfault information for my processes without root permissions?

Debian no longer exposes dmesg to users. It contains useful history about crashes. For example: segfault at [...] error 4 in libHSrts_thr-ghc8.0.2.so[7f00f2b6b000+63000] How can I get this ...
8
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2answers
9k views

Understanding “serial8250: too much work for irq4” kernel message

dmesg shows lots of messages from serial8250: $ dmesg | grep -i serial [ 0.884481] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 6.584431] systemd[1]: Created slice system-serial\...
7
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1answer
2k views

What is the first column in dmesg?

I'm trying the dmesg command which outputs the message buffer of the kernal. The format returned on my setup is in the format: ... [ 0.000000] 3 base 100000000 mask F00000000 write-back ... [ ...
2
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1answer
2k views

USB drive is not recognized

I have a Transcend USB drive that is not recognized by the system (Debian Jessie 3.16-amd64). Let me explain: When I connect it to the PC (Gnome) it makes the typical sound of when a drive is ...
7
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1answer
3k views

What is the difference between dmesg and journalctl [closed]

I am completely new in Linux. What I see are two logs that run approximately in the same way. Why there are two logs? What kind of messages I expect to see in each of them? And what is the difference ...
0
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1answer
262 views

Long system startup

I can't understand, why there is so long time delay between these two lines in my dmesg log. [ 2.089039] hid-generic 0003:1EA7:2001.0003: input,hiddev0,hidraw2: USB HID v1.10 Mouse [WFDZ Gaming ...
3
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0answers
134 views

Broken Card Reader. Dmesg getting spammed

Last Month I've bought a old Notebook. Its awesome, the only catch is, it has a broken Card Reader (0bda:0138). This is not a big deal. The real problem is dmesg is getting spammed with errors. Every ...
0
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1answer
3k views

How to tail dmesg on CentOS 7

In a CentOS 7 server, I typed dmesg and noted the time stamp of the last entry. Next, I typed tail -f /var/log/dmesg in a DIFFERENT TERMINAL ON THE SAME MACHINE, so that I could watch the log tail. ...
3
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0answers
350 views

System lags/freezes, dmesg shows GPU errors and faux USB disconnect - what to do?

I use GNU/Linux Mint 18.1 64-bit on an Intel i5 3570K machine with a discrete nVIDIA-based graphics card. Recently there was a power outage in my neighborhood. After it, I couldn't boot my machine ...
2
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1answer
165 views

What does the 'd' mean in “dmesg”? [duplicate]

What is the origin of the letter d in dmesg? Wikipedia says: dmesg (display message or driver message) No reference are given for this assertion - it could just as well be "debug message". What ...
3
votes
2answers
486 views

How can I find out what the entries in dmesg means?

It's interesting to look at the entries in dmesg, but how can I find out what they all mean? I did man dmesg, but I can't find anything about decoding the messages themselves. I wonder: Is there a ...
3
votes
1answer
85 views

What is the meaning of “Worm initializing…” in the output of dmesg?

I have an RHEL 5 system: [root@myhost ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.11 (Tikanga) When I run dmesg, I get a strange and disconcerting message: [root@myhost ~]...