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Questions tagged [dmesg]

dmesg (for "display message" or "driver message" ) print or control the kernel ring buffer

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printk message doesn't display till next event

I am a beginner to kernel module programming so this might turn out to be something dumb. I am following this guide. I am trying to make a module that spans multiple files. (from the guide). The ...
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11 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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1answer
24 views

WD element Harddrive is not being read

lsusb shows drive as listed but it is not showing in file browser. Following is the output of dmesg : [ 835.749084] usb 1-3: new high-speed USB device number 7 using xhci_hcd [ 835.918956] usb 1-3: ...
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40 views

dmesg giving error of SATA link down

[ 1145.670001] ata6: EH complete [ 1145.670454] ata6: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen [ 1145.670459] ata6: irq_stat 0x00000040, connection status changed [ 1145.670463] ...
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64 views

Several errors in dmesg

Hello my system's features are as follows: Hardware: Processor: Intel Core i7-8750H @ 4.10GHz (12 Cores), Motherboard: Dell 0M2MWX, Chipset: Intel Device a36f, Memory: 16384MB, Disk: 1000GB Seagate ...
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98 views

USB devices recognized, but not working. Ubuntu 18.04

I have an Ubunutu 18.04 machine that (currently inexplicably - automatic update?) restarted over this past weekend. Upon reboot, they USB keyboard and mouse do not work. This is to say, no keystroke ...
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33 views

“dmesg: klogctl failed: Operation not permitted” appears every time terminal is opened

I am experiencing an issue on Kubuntu 18.10 where every time I open any form of terminal (Konsole, Yakuake, Xterm) I receive the message dmesg: klogctl failed: Operation not permitted in the ...
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139 views

Ubuntu 18.10 crashes

Please excuse my English. My Ubuntu 18.10 crashes very often since about a week. When it happens, I can't do anything (CTRL+ALT+FX doesn't work) except moving the mouse's cursor. My hardware is i5 ...
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41 views

“more” command doesn't work as expected in initramfs

I'm trying to watch dmesg output in (initramfs) but command output has more lines than a screen. So I see only the end of dmesg output. Busybox v1.21.1 has more command, but dmesg | more somehow doesn'...
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239 views

Core temperature above threshold, cpu clock throttled but my CPU tempature is just fine

The tempature of my CPUs are just fine, there is no problem and the CPU usage for each CPU is usually under %10. But when I check dmesg, I usually see CPU errors about tempature above threshold but it'...
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18 views

What to do while booted into a machine with a broken /home

I was just running some DL code in a jupyter notebook and watching a youtube video in another tab. I heard the GPU fan turn off, but I saw an error about an IO issue. I did some poking around. When I ...
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50 views

Unresponsive computer when left running some engineering simulations overnight

This is the third time this has happened in last 4-5 months (16.04 as well as now 18.04 LTS). I run some engineering simulations on my Ubuntu machine and normally everything would be alright. ...
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1answer
352 views

MCE error message and random reboots [closed]

May someone help me in decoding the exact significance of the following message I found in dmesg? Jan 28 15:58:17 mint kernel: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 7: 8c00004000010093 ...
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121 views

Long boot times Kubuntu 18.04

I'm running Kubuntu 18.04. Boot takes about 90 seconds, which is far longer than it ought to be. If I run dmesg there's two "jumps" that are apparent. The first is: [ 2.876292] clocksource: ...
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403 views

What do “i2c_hid_get_input” errors mean?

I'm using Ubuntu 18.04. When I run dmesg in the Terminal, there are some red results and maybe bad ones. Also, there are a lot of red i2c_hid_get_input errors. They happen every minute, even after the ...
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1answer
42 views

Time discrepancy between dmesg and journalctl -k

Edit: I couldn't find out why this weird effect happens, but I found the culprit of the actual problem (slow bootup) to be the same as described here: https://bugs.launchpad.net/ubuntu/+source/...
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116 views

Dmesg throwing strange ATA errors. Device hangs abruptly with Too many open files and ata errors

My device started getting really slow and hanged even with roughly 4 GB ram remaining(Total is 8 GiB). I checked lsof and could see an unusually high number of open files. This raised suspicions about ...
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1answer
166 views

Mounting an external drive: Need help translating dmesg output

I'm troubleshooting an external hardrive for photographer friend. She has a year's worth of photos stored on the external drive, unfortunately, Windows (her go-to operating system) does not recognize ...
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1k views

Extremely slow boot, with kernel error

I am new at the forum, sorry for the orthography. I have Ubuntu Budgie 18.04 because my previous OS was getting freezed after login, however this Ubuntu is ridicously slow since I select between linux ...
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616 views

Processor microcode firmware update

In Ubuntu 17.04 and 18.04 and Debian look like Kali when I enter dmesg | grep 'microcode' in the terminal I get the following results: [ 0.000000] microcode: microcode updated early to revision ...
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168 views

error in dmesg 'failed' messages

Can anyone explain what that failed messages means ? How to fix them. Laptop Lenovo V110-15ISK. There is Ubuntu 18.04. [0.167607] platform MSFT0101:00: failed to claim resource 1: [mem 0xfed40000-...
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PKCS Signature error/warnings running dmesg on Ubuntu Mate 18.04

I'm on a clean install of Ubuntu Mate 18.04, the system itself is working with no issues, but I am running dmesg to look at errors and warnings. I like to try to get them all dealt with if possible ...
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311 views

External hard disk drive not detected on any computer

My Adata HV 100 doesn't show up on computers; any computers. I am totally frustrated. It doesn't show up on Windows OS, Linux or Mac. I ran most of the command I found but none of them worked. Here ...
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857 views

cp210x ttyUSB0: failed to get comm status

Running Ubuntu 16:04. I have bought a serial device(ttl) to USB called cp210x. It works most of the time, but after a while it can suddenly disconnect. There are two ways to activate it again, one is ...
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183 views

What does TIOCGSERIAL is not supported mean?

Im writing a program, that sends data to a bluetooth device. The device is attached to my computer via /dev/rfcomm1. After numerous issues, I read the dmesg log, and saw: TIOCGSERIAL is not supported ...
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447 views

External HDD shows up in dmesg but not in fdisk

I have an hdd with important data inside and I can't get it mounted to access the data. When connected I can hear it spin. dmesg: [11868.068196] usb 2-2: new SuperSpeed USB device number 2 using ...
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68 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 ...
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168 views

dmesg constantly prints message “event field not found”?

I have recently followed a guide that recommended to check dmesg for some output with dmesg | grep something. I forgot to add the grep-command first and just entered dmesg in the terminal, which ...
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191 views

Long Boot Time Ubuntu 17.04 Due to audit

When booting my machine, the boot time is in excess of 70 seconds every time. I have a pretty decent PC (i7, 8GB RAm etc). It was pretty quick when I initially installed and started using the system. ...
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326 views

*BAD*gran_size even on live disks

I am having all kind of issues with choppy performance, slow website loading, high CPU, the fan always kicking on, high load average, and so on. I have multiple kernels installed, and regardless of ...
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683 views

VirtualBox 5.0 - Starting kernel modules failed

I'm attempting to get VirtualBox set up for the first time to use with Genymotion. I'm currently running Ubuntu 16.04 LTS Xenial. I followed the Debian-based Linux distributions instructions here: ...
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335 views

Where can I find documentation on the output of dmesg?

Trying to figure out why a USB drive isn't working, I plug it in and run dmesg to get: [101100.860034] usb 6-2: new full-speed USB device number 18 using uhci_hcd [101100.980060] usb 6-2: device ...
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24 views

Buffer I/O error on device loop0, logical block on new M2 ssd, can't be failing, right? [duplicate]

It's new M2 nvme samsung 951p ssd that has been going into read only mode few days per day last several days. Im fighting the issue ever since and seems to be narrowing down to this: Buffer I/O ...
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1answer
614 views

Why does the time given by dmesg timestamps differ from the actual time (and output of `date`)?

I am using Ubuntu 16.04.2 LTS dmesg outputs lines like this: [ma mei 8 09:00:16 2017] [UFW BLOCK] IN=eth0 OUT= MAC= SRC=140.205.228.53 DST=xx.xxx.xxx.xxx LEN=143 TOS=0x00 PREC=0x00 TTL=111 ID=...
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512 views

Slow boot after “/” partition resize

I recently resized my / directory by doing the following things on a Gparted live CD boot: Delete swap (it was between /home and /). Make space at start of /home, and extend / through both the now ...
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1answer
1k views

getting intel-rapl: package locked by BIOS when i run dmesg. Is this normal?

[ 13.537375] intel_rapl: Found RAPL domain package [ 13.537377] intel_rapl: Found RAPL domain core [ 13.537382] intel_rapl: RAPL package 0 domain package locked by BIOS [ 48....
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1answer
487 views

How to filter dmesg by time

I would like to filter by time. for instance: dmesg -sec 30 The output would be events that happened for last 30 seconds. Or with time interval. Any filtering with time.
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101 views

Ubuntu 16.04 slow boot time problem

Ubuntu used to boot fast but now takes too long. I don't know what's causing the problem, I've read that it might have something to do with /etc/fstab and the swap files. I ran dmesg and here is what ...
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514 views

tsc: Unable to calibrate against PIT

$ dmesg | grep tsc [ 0.000000] tsc: Unable to calibrate against PIT [ 0.000000] tsc: using HPET reference calibration [ 0.000000] tsc: Detected 4008.361 MHz processor [ 1.608138] tsc: ...
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1answer
75 views

Slow boot but no hints in dmesg

I have had problems with really slow boots on my Ubuntu 16.04. I dual boot with windows and at the grub loader i choose Ubuntu and the screen turns purple. Then it stays purple for up to 5 minutes ...
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105 views

Wifi disconnect randomly 5 or 10 times per day without reason

I have a Intel NUC NUC6I3SYH that has on board an Intel Core i3-6100U and an Intel Wireless-AC 8260 M.2 welded on main board. I installed Ubuntu 16.04LTS two mounths ago and everything was ok. This ...
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2answers
497 views

Ubuntu 16.04 Slow boot due to bluetooth

My ASUS UX305 boots very slow on ubuntu 16.04, and obviously it is due to bluetooth. Here is the dmesg output : [ 8.784060] Bluetooth: hci0 command 0xfc8e tx timeout [ 8.784060] Bluetooth: ...
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3answers
613 views

What is this traffic?

My Computer seems to be doing something that the firewall (UFW) is blocking. from dmesg: [207683.801389] [UFW BLOCK] IN=enp0s25 OUT= MAC= SRC=fe80:0000:0000:0000:51c2:a242:da77:ce8f DST=ff02:0000:...
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1answer
474 views

Mount point 0 is not valid path, ignoring and cryptoswap1.swap:8 not an absolute path, ignoring

I'm using ubuntu 16.04. On startup I started getting a bunch of errors. I have encrypted my disk. When checking dmesg I get the following error: Systemd-fstab-generator[44]: Mount point 0 is not a ...
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567 views

USB 3.0 memory stick fails with “SEL for device-initiated U2 failed”

This is a Kingston Data Traveler Ultimate G3 memory stick. Device works fine on Windows (same hardware), but it doesn't show up in lsusb on an Ubtuntu 16.10 with Kernel 4.4.0. dmesg shows the ...
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232 views

Slow boot! Ubuntu 16.04

Not sure why suddenly a very slow boot when I start Ubuntu. Now it is about 3 mins to boot fully. The dmesg: [ 6.446195] audit: type=1400 audit(1481821642.925:11): apparmor="STATUS" operation="...
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1answer
7k views

Where did the functionality of /var/log/dmesg go in xenial 16.04?

/var/log/dmesg was a useful boot time dmesg dump. I can’t find that any more in Ubuntu 16.04. Is it somewhere else? (/var/log/kern.log* is limited; it catches kernel messages only after the logging ...
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1answer
228 views

A really long boot time in Ubuntu 16.04 LTS because of “cfg80211: World regulatory domain updated”! Need a fix!

Here is the snippet output of dmesg. [ 45.760248] VBoxPciLinuxInit [ 45.882110] vboxpci: IOMMU not found (not registered) [ 471.007790] cfg80211: World regulatory domain updated: [ 471.007795] ...
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566 views

bluetooth error: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.UnknownObject:

Using ubuntu 16.04 after accidentally removing my bluetooth headset device from the bluetooth manager device list it is either no longer visible in a bluetooth search, or it shows up for a few seconds ...
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1answer
155 views

High boottime - Big gaps in dmesg

My system takes a very long time to boot. systemd-analyze: Startup finished in 8.487s (kernel) + 3min 544ms (userspace) = 3min 9.032s systemd-analyze blame: 10.451s NetworkManager-wait-...