Questions tagged [dmesg]

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2answers
304 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/...
3
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0answers
2k 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 (...
3
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1answer
3k 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 ...
3
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4answers
23k 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 ...
1
vote
1answer
2k 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
299 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
votes
1answer
926 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)...
2
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0answers
383 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 ...
1
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1answer
5k 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
1k 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
600 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 ...
-1
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1answer
166 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
2k 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 ...
2
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1answer
1k 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 ...
5
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3answers
2k 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
2k 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 ...
2
votes
2answers
296 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
908 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
144 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 ...
26
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1answer
33k 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: % ...
6
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1answer
15k 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
337 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 ...
20
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3answers
24k 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\...
11
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1answer
4k 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
14k 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 ...
17
votes
1answer
9k 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
344 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
votes
1answer
184 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
6k 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
votes
1answer
618 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
259 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
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2answers
1k 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
97 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 ~]...
11
votes
1answer
5k views

What does “usb: port power management may be unreliable” actually mean?

Trying to debug an issue with an ethernet usb-c adaptor, I found that dmesg reports this: usb: port power management may be unreliable What does this mean? Where can I find a reliable documentation ...
7
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0answers
4k views

Linux 3.x fails assigning PCI BAR memory

I got an IBM x3850 type 8864 machine, I can successfully boot using a 2.6.32 kernel but when I try to use a 3.10 kernel or newer the kernel fails to initialize all PCI slots (I can fix this (manually),...
1
vote
1answer
1k views

How to start talkd daemon?

I'd like to set up a talkd deamon on my machine to talk with other users. The deamon should be set through inetd: # /usr/sbin/in.talkd must be run from inetd. How do I configure inetd to start the ...
6
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0answers
880 views

How hardware detection works in linux? [closed]

Whenever I have to troubleshoot "wifi is not working", "video is not working" etc. problems in linux I really do not understand how to do it correctly. My approach is messy: try lspci, look into dmesg,...
4
votes
1answer
5k views

dmesg - “new high-speed USB device” repeated forever [closed]

I am on Debian Jessie 8.5 64bit on a VAIO laptop. If I run dmesg on my system, I get the following: [ 1031.025538] usb 1-1.2: new high-speed USB device number 62 using ehci-pci [ 1031.293612] usb 1-1....
2
votes
1answer
1k views

MIDI Linux Gadget Module (g_midi) with iPad on Raspberry Pi

I'm trying to use the MIDI Linux Gadget Module (g_midi) to turn a Raspberry Pi Zero into a USB MIDI device. I've enabled g_midi using the following commands: echo "dtoverlay=dwc2" | sudo tee -a /boot/...
2
votes
1answer
557 views

Bluetooth BNEP takes a long time to load on boot Debian

My system takes a long time to boot and looking at dmesg output I found an entry with BNEP (Ethernet Emulation) ver 1.3 that takes around 27 seconds to load. Does anyone have a clue on how to speed ...
2
votes
1answer
417 views

Tweak perl script for human-readable dmesg output

In RHEL 6 I have the kernel parameter: printk.time=1 So that my dmesg would have a timestamp. However it shows in seconds from restart, like this: [12.23456] I found a script that you place inside ...
2
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0answers
498 views

Can't mount fdescfs to /dev/fd

Hello I can't mount fdesc,here is the output root@nshost2:~ # mount -t fdescfs fdesc /dev/fd mount: fdesc: Operation not supported by device And here is the output of dmesg root@nshost2:~ # dmesg | ...
1
vote
0answers
196 views

dmesg filling up with error message that are just a hex number

I've got a Cubietruck running debian 8.4, and it seems to be running OK, but just happened to do a dmesg, and found that I was getting a lot of message consisting of just a hex number... [ 3353....
2
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0answers
1k views

Can't get usb ethernet adapter running under CentOS 6 minimal

I have a cheap usb adapter and using it on a minmal CentOS 6.7 box, when I plug in the adapter it's recognized as usb device but not as ethernet adapter, although I've loaded these kernel modules: ...
0
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1answer
107 views

dmesg -n7 has no effect in virtual terminal

When I type dmesg -n7 in console (ie when I switch to tty1 using Ctrl+Alt+F1) I can see all debugging messages (new disks plugged in, etc). When I type dmesg -n7 in virtual terminal (terminal ...
1
vote
1answer
396 views

AE_NOT_FOUND Evaluating _DOD

I have arch linux installed on my Dell inspiron 3543, fwts told me about a message in my kernal log about an acpi ae_not_found exception while evaluating _DOD. It seems that this is related to my ...
0
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1answer
193 views

is there a description for kernel messages?

I use dmesg to output kernel messages, but since I'm new to linux I have no idea what this informations mean. Is there a good tutorial or description so I can understand the messages. for example: ...
4
votes
2answers
10k views

How can I activate extra-verbose mode (debugging mode) during Debian boot?

How do I activate extra verbosity during boot, on Debian? I removed the quiet parameter and tried to add debug but it didn't help. My problem is that my keyboard takes 2-3 min to activate so it ...
1
vote
2answers
661 views

Making sense of Time in dmesg

I know the time in dmesg is the time since boot. But my specific question is this time is calculated at the start or end of the process mentioned in the line? Why this is important? take this example:...
1
vote
1answer
3k views

Wifi stopped working, “Unknown symbol wireless_nlevent_flush”

As of this afternoon the wifi on my Dell XPS 13 stopped working (running Debian sid with kernel 4.4.0-1-amd64). lspci detects my wifi card, but ifconfig -a shows only the loopback interface. I tried ...