Questions tagged [dmesg]

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rhel + Metadata corruption detected at xfs

due of linux electricity failure , our server crashed and reboot now server is up but we see the following messages from dmesg is it mean that OS damaged ? [33505.670070] XFS (dm-2): Unmount and ...
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20 views

MTRR (Memory Type Range Register) in Debian 10 dmesg messages

[Sun Mar 1 07:51:40 2020] MTRR default type: uncachable [Sun Mar 1 07:51:40 2020] MTRR fixed ranges enabled: [Sun Mar 1 07:51:40 2020] MTRR variable ranges enabled: [Sun Mar 1 07:51:40 2020] ...
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How can I fix Debian “Problem loading UEFI:db X.509 certificate (-65)” error message!

Debian 10 on an Acer Aspire A515-51G, UEFI boot I have this error displayed at boot logs and in "dmesg". Other threads I have found, suggested to disable "Secure Boot" in BIOS but that didn't fix ...
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105 views

How do I troubleshoot some unexpected error messages reported while booting Debian 10?

I upgraded my Debian from 9th version to 10th when Debian 10 was officially released. Since I upgraded to Debian 10, I am getting following messages while booting: [ 11.008027] pstore: Using ...
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2answers
51 views

dmesg follow in FreeBSD

Is there a way to watch dmesg in realtime on FreeBSD like using the --follow (-w) option on dmesg in linux?
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1answer
60 views

Unable to enumerate USB device - unknown device: how to find out device that odes not show in lsusb?

I have a hardware product which sends a signal to an LCD display. The hardware box (unknown chip set) has an USB-A outlet and connects to a USB-B outlet on an LCD-display. The LCD display shows ...
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128 views

dmesg shows APCI BIOS error AE_ALREADY_EXISTS

I am seeing this in dmesg startup, over and over, after like 20 times, it moves on. What does the error mean and should I be worried? I have Ubuntu 18.04.3 Everything appears to be working, but I ...
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449 views

*** VALIDATE xxx *** in dmesg meaning?

I can see these 4 VALIDATE lines in my dmesg protocol: $ \dmesg | grep VALIDATE [ 0.176538] *** VALIDATE proc *** [ 0.176572] *** VALIDATE cgroup1 *** [ 0.176574] *** VALIDATE cgroup2 *** [ ...
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31 views

USB ports not working on Gentoo 4.19.27

I'm running a freshly compiled Gentoo 4.19.27-r1. lspci | grep USB returns: 00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 21) lsusb returns nothing dmesg | ...
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70 views

BIOS-e820 in dmesg - How do I calculate the memory range from addresses

kp@localhost ~]$ sudo dmesg | grep -i "e820" results in the following output: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009ffff] usable [ 0.000000] BIOS-e820: [mem ...
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37 views

Faulty usb device: how to disable to get rid of dmesg errors

I bought a second hand computer, which seems to have a faulty USB port (or something - I haven't encountered it). The only real annoyance is that my syslogs are spammed with the same messages: [...
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507 views

“Calgary: Unable to locate Rio Grande table in EBDA” <- what does this mean?

When I boot my system, I get the following message: [Sat Oct 26 20:34:25 2019] Calgary: detecting Calgary via BIOS EBDA area [Sat Oct 26 20:34:25 2019] Calgary: Unable to locate Rio Grande table in ...
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549 views

New CentOS 8 Install Crashing

So I just installed CentOS 8 and I keep having random freezes/crashes. I have tried looking at my /var/log/messages but I can't find anything of use to it. The crashes happen inconsistently and I can'...
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1answer
44 views

How can i find out which hdd is failing

One of my hard driver started to do a noise when i open nemo. dmesg logs shows [ 66.160051] ata6.00: exception Emask 0x50 SAct 0x2000 SErr 0x30802 action 0xe frozen [ 66.160053] ata6.00: ...
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21 views

How to input some message into kmsg by printk on web page

How to input some message into kmsg by printk on web page Apache has no permission to modify /dev/kmsg
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1answer
46 views

SATA hard disk not recognized

there seems to be a problem with the hard disk. I just wanted to know if I can fix it somehow or I should throw it away. the problem is that the hard disk is not recognized. https://pastebin.com/...
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1answer
278 views

segfault from dmesg + redhat linux

I see unusual info from the dmesg as the following: addr2line[207071]: segfault at 30 ip 1000543d41881 sp 00037fff87dd4420 error 6 addr2line[207089]: segfault at 0 ip 0200353455f8c9052e sp ...
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1answer
35 views

what does ipheth_carrier_set: usb_control_msg: -110 mean

When I connect my girlfriends iphone to my ubuntu mate laptop I am not able to access it. dmesg -w shows the following log: [ 1450.188245] usb 1-2: new high-speed USB device number 6 using xhci_hcd ...
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1answer
884 views

Do I need to take action regarding my Microarchitectural Data Sampling (MDS) status?

My dmesg output contains the following line: [ 0.265021] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more ...
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26 views

sysctl -a doesn't include log_buf_len

I hope to check the value of log_buf_len via sysctl, but sysctl -a doesn't show it, why and is there any other way to check its value
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274 views

How to check for network issues? dmesg? and how to setup logging?

I'm pretty new to Linux but have worked with Windows servers and networks for 30 years so I understand the principles but am learning the 'Linux' way of doing things. I have setup a Centos 7.6 server ...
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2answers
174 views

dmesg: custom time format

dmesg has the option -T to print human-readable timestamps, and new versions have the option --time-format, where the time format can be changed, for instance: --time-format iso Unfortunately, the ...
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70 views

dmesg to check a portable disk

Run dmesg -T to check a portable disk and the results [Fri Aug 30 21:31:24 2019] usb 2-1: New USB device found, idVendor=1058, idProduct=07a8, bcdDevice=10.42 [Fri Aug 30 21:31:24 2019] usb 2-1: New ...
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15 views

Particular USB Device not getting mounted - Embedded Linux

I have an embedded Linux, all the USB devices are getting mounted automatically except one. The usb device mounts on another Linux machine, so no problem with device. dmesg output, nothing seems to ...
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31 views

get errors after installing the netdata tool

after installing the netdata tool ( https://docs.netdata.cloud/packaging/installer/) we notice about the following errors that related to netdata tool [79103.083011] netdata[8026]: segfault at 2f ip ...
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1answer
240 views

Kensington SD I/O Read Error, not recognised on Ubuntu 19.04?

I have two Kensington SD cards that will not be recognised on my ubuntu 19.04 OS. They are definitely working though, when I plug them into my windows 10 computer they register. I also have an old ...
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1answer
42 views

How can I send dmesg printout to ftrace subsystem?

How can I send dmesg printout to ftrace subsystem? I like correlate the dmesg msg with the functions call graph in ftrace. Thanks
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1answer
63 views

How to clear cache in Linux without flooding dmesg?

I have a shell script which repeatedly clears the cache with echo 3 > /proc/sys/vm/drop_caches The trouble is that this ends up completely flooding dmesg because it runs so often. Is there a ...
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1answer
109 views

Debian dmesg thinkpad_acpi: EC reports that Thermal Table has changed

I'm using Debian 9(stretch) with kernel Linux 4.9.0-8-amd64 on a Thinkpad T440p. I keep receiving logs by the second from dmesg about one particular issue I seem to not find a solution to on the Web. ...
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1answer
249 views

How to understand Trace from dmesg?

I'm learning linux kernel debugging and dmesg is the tool that output kernel debug log: ... [ 2.988000] Trace: [ 2.988000] [<ffffffff80942810>] __warn+0x160/0x190 [ 2.988000] [<...
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1answer
112 views

How do I get dmesg to store a log file?

My phone keeps rebooting. I want to know what dmesg says at the moment it reboots, so I can diagnose. Unfortunately, the reboots don't happen predictably, and only when I'm using it. I can't keep my ...
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1answer
311 views

sd 5:0:0:0: [sda] Attached SCSI disk, what are these four numbers? Will they change?

I can usually see this log in dmesg: sd 5:0:0:0: [sda] Attached SCSI disk Can you please explain what are these 4 numbers? Will these numbers change after reboot? or it should be constant?
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2answers
80 views

Automatic rmmod / modprobe based on dmesg parsing

I am using a MacBooPro10,1 Debian stable (default install with rsyslogd) system for which the trackpad eventually fails (pointer stop working) from time to time as can be seen : $ dmesg [...] [...
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1answer
1k views

unable to launch any program: trap int3 ip error

I cannot launch any program in my desktop environment. I get these errors in dmesg: traps: terminator[3670] trap int3 ip:374dda71261 sp:388624bbec0 error:0 traps: pcmanfm[3685] trap int3 ip:...
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48 views

If e2fsck says output from a mounted file system isnt to be trusted, then how does systemd generate log messages from fs errors?

man e2fsck says; Note that in general it is not safe to run e2fsck on mounted filesystems. The only exception is if the -n option is specified, and -c, -l, or -L options are not ...
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45 views

Linux Kernel: Redirecting dmesg to a txt file through the kernel space

I understand that writing files through the kernel space is not recommended but I have been porting 4.9 to my Android device. While fixing the display, the device stopped booting(Splash -> Black ...
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1answer
74 views

Why is clearing the console the default behavior of Linux today? [closed]

Why doesn't the boot messages persist in the terminal after booting, on modern Linux distributions? Yes, I know I can make the boot messages persist with --noclear or TTYVTDisallocate=no. Like ...
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1answer
3k views

“kernel: Buffer I/O error on device” - Does my server have a hardware problem?

we have linux DB server redhat 7.2 we notice about many message as below about all disks that are mounted from /var/log/messages what we are need to understand if this behavior is relevant to HW ...
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2answers
400 views

SSD's hard resetting link CentOS 7

I have two Intel SSDSC2CW120A3 SSDs in a SuperMicro X9SCL/X9SCM set for software RAID-1 on CentOS 7: Linux hostname.local 3.10.0-957.5.1.el7.x86_64 #1 SMP Fri Feb 1 14:54:57 UTC 2019 x86_64 x86_64 ...
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2answers
718 views

why MTU change from 1500 to 9000

in /var/log/message file we found something interesting Mar 9 07:08:32 linux54 kernel: ixgbe 0000:0b:00.1 en3j87: changing MTU from 1500 to 9000 we can see the interface card - en3j87 change from ...
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1answer
861 views

dmesg gave errors blk_update_request: I/O error, dev xxx, sector xxxxxxxxxx

I found errors by performing dmesg, seems like there're something wrong with all of disks. I keep tracking the errors until now. Here're a log from dmesg. [Wed Mar 13 17:12:26 2019] ...
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1answer
2k views

Writing to /dev/kmsg randomly shows up in /proc/kmsg and always in dmesg?

When writing a message to /dev/kmsg while tailing /proc/kmsg the messages show up very randomly, in never shows up in /var/log/kern.log. However, dmesg gets all the messages correctly. Example # ...
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1answer
540 views

Understanding a dmesg kernel warning message

I am trying to debug my kernel module. When I run it I get the following kernel warnings, but it seems that there is no informative message like other warnings I've seen. Is it possible to get any ...
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1answer
387 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; ...
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1answer
76 views

NVIDIA usable memory 4GB instead of 6GB?

I have an the following graphics card in my laptop: GPU: NVIDIA, GeForce GTX 1060, Max-Q Design, 6 GB VRAM I am on Linux Mint 19.1 Cinnamon 64-bit with NVIDIA drivers version 390 official: You can ...
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2answers
357 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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378 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 ...
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1answer
85 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 ...
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1answer
221 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 ...
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57 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 ...