Questions tagged [dmesg]

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

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How to stop apparmor spew in the logs

I try to keep my dmesg clean, so I can see the signal in the noise. However, I am annoyed by the spamming that app armor does in the logs: [74339.538450] audit: type=1400 audit(1620404490.953:75): ...
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My laptop freeze or has black screen when I open the lid after suspend

Since when I bought this laptop (Huawei Matebook D14, it has a AMD Ryzen 5 3500U CPU with a Radeon Vega 8 GPU) and installed Linux on it (it's dualbooting with Windows), I have this problem that ...
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ACPI Error: Needed type [Reference], found [Package] 0000000027f1cd97 (20200528/exresop-66)

[ 1489.465625] ACPI Error: Needed type [Reference], found [Package] 0000000038987839 (20200528/exresop-66) [ 1489.465633] ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Notify] (...
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USB mouse woes, have to unplug and reconnect

My mouse: nicholas@mordor:~$ nicholas@mordor:~$ lsusb -v Bus 002 Device 022: ID 1c4f:0034 SiGma Micro XM102K Optical Wheel Mouse Couldn't open device, some information will be missing Device ...
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173 views

Usb to Serial Cable adapter, recognized but not attached to a /dev/tty*

I have a USB-to-RS232 converter cable, the cable is proven to work in Windows machines, Ubuntu detects it but does not attach the converter to any /dev/tty. I tried connecting it to USB 2.0 and 3.0, ...
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69 views

flash drive is not visible for mount and fdisk

I was installing ubuntu studio on asus laptop and something went wrong during installation. I mean I corrupted my installation medium (silicon power flash drive, 16gb) somehow. then I used lsblk and ...
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198 views

Having trouble detecting my usb hard drive adapter - I can see it with “dmesg” in terminal but how to access it

I just bought a USB hard drive adapter to connect an IDE hard drive from my old, long gone, laptop. According to the manufactures manual the hard drive is recognized by the adapter(a blue light ...
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36 views

USB Storage not found in anything

I have a Onn brand 128GB flash drive and I cannot find it in fdsik, gparted, lsusb, lsblk, or any of the other methods. The only way I am able to even see that it is plugged into my computer is the ...
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495 views

Meaning of message `nouveau 0000:01:00.0: fb: trapped read at 0101400000 on channel -1`

What is the meaning of these messages in dmesg? [184608.460680] nouveau 0000:01:00.0: fb: trapped read at 0101400000 on channel -1 [3fee0000 unknown] engine 06 [BAR] client 08 [PFIFO_READ] subclient ...
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Long boot time after using gparted to resize partitions

I recently used gparted to increase my ubuntu partition's size. Now, the startup time is super long. When i run dmesg I get (let me know if you want the full text. Below is just certain parts) [ 0....
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Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7

Few days back, I ran dmesg on my terminal to see this line Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7 Sometimes, as in the image below, the kernel ring buffer only ...
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117 views

Error message of TPM after run “dmesg | grep -i error”

I found the error message of TPM after "dmesg | grep -i error". ima: Error Communicating to TPM Chip tpm tpm0:tpm_try_transmit: send() error -5 Could someone explain the error message and ...
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1answer
370 views

USB devices in dock disconnecting on notification ( Lenovo X1 Carbon gen 7 )

When receiving a Chromium notification from slack, or sometimes just playing sound from Spotify, ubuntu will disconnect all USB devices connected to my Thunderbolt 3 dock. Charging is working. dmesg ...
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146 views

what does console [tty0] enabled mean when I type dmesg | grep tty?

I am a beginner in Linux and serial communication in Linux. On going through the link https://www.cyberciti.biz/faq/find-out-linux-serial-ports-with-setserial/, I ran the dmesg | grep tty command. But ...
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Ubuntu 20.04 takes too long to boot

I have recently installed Ubuntu 20.04 on my HP-notebook(intel core i-5, 8GB RAM, AMD Radeon 2GB). It takes more than 2 min to reach the login screen. I used the command dmesg to analyze which ...
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412 views

Shutdown msg: ata failed stop fis rx (-16)

I am dual booting ubuntu 20.04/w10 on separate NVme.m2 on an asrock x570 and i have an ssd connected too as a storage drive. When i shutdown/restart my system, the following msg flashes for a sec: [32....
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printk.time=0 command, placed on GRUB config, is not working

My virtual env is Ubuntu 16.04 that using 4.8.0-36-generic kernel. I am trying to disable the timestamps at the beginning of DMESG lines temporarily via GRUB. I have edited GRUB config and added "...
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1answer
254 views

18.04 - Tensorflow causes intermittent freezes during standby after upgrade to Nvidia 435 drivers

I recently upgraded my Nvidia drivers from 418 to 435 (I have an RTX 2070). Long story but I had some issues with driver conflicts, so I had to switch to the nouveau drivers and back again. I'm pretty ...
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240 views

ath10k_pci not working with Qualcomm Atheros QCA9377 wireless adapter remains UNCLAIMED

After installing Ubuntu 19.10 in my Lenovo e41-25, it showed wireless adapter not found. when I followed the troubleshooting instructions I got the following results: ######### lshw -c network #######...
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1answer
47 views

History logs in Lubuntu Server

May someone tell me if the system logs (especially dmesg) are archived somewhere else than /var/logs? In this folder I can find only dmesg from last 6 restarts. I need to look two weeks before to ...
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669 views

Ubuntu19.10 - Shutdown/Reboot hangs for about 90 sec

Since at some point, this has begun. Before that, shutdown was so fast. I've been searching to get some clue about a week, but wasn't lucky. Following the popular method from https://freedesktop.org/...
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1answer
156 views

What does “Page fault failed for pfn[0] = 0x0” in kern.log means?

I recently started getting the following elements printed in "kern.log" and syslog. Jan 29 10:28:19 server kernel: [82515.307047] Page fault failed for pfn[0] = 0x0 Jan 29 10:28:19 server kernel: [...
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573 views

speedup boot process

I often have to reboot my laptop due to development stuff, so I try to minimize bootup time on Ubuntu 19.10 This is the output of dmesg # dmesg ... [ 0.017283] On node 0 totalpages: 10414141 [ ...
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200 views

PCIe Bus Error, Physical Layer

When I run the command dmesg it shows 3 times the following error: [ 2.725876] pcieport 0000:00:1c.5: AER: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID) [ 2.725879] ...
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Resuming after suspend problem ,Freezing and multible errors on wakeup

After i lay down my laptop screen and open it again i get multiple error messages. what i got from dmesg ... [ 80.203323] Freezing of tasks failed after 20.005 seconds (1 tasks refusing to freeze, ...
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282 views

18.04 - More than 2 mins boot on SSD

I've Ubuntu 18.04 installed on Dell Latitude E6320 (on Kingstone SSD), It used to boot in about 14 - 18 sec, but about three days ago the system started to take a lot of time to boot and in general ...
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1answer
739 views

SD card insert/remove behaviors not detected until running lspci command

Whenever I insert/remove SD card, my ubuntu doesn't recognize those behaviors automatically. I have to run lspci command to manually tell ubuntu about the hardware change. I want to make my ubuntu ...
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350 views

Can't install sudo /sbin/vboxconfig to run Virtual Box [duplicate]

I have a very annoying problem: I want to run VB, but I can't because it needs sudo /sbin/vboxconfig . Sure, why not. I tried to install it, and it says there's errors and that I need to do dmesg to ...
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69 views

“Foreign” messages in syslog and dmesg — system breached or side effect of VPS?

I am running a small Ubuntu 14.04 server on a VPS offering. Since a few days ago, the system seems to crash (almost) daily. My application logs did not help a lot, but I noticed these log entries in /...
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163 views

Stop modprobe spam

I setup GPU passthrough, it works, but ubuntu is spamming modprobe processes, it consumes lot of CPU, this is log from dmesg: [22014.015852] PKCS#7 signature not signed with a trusted key [22014....
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What is this dmesg error?

1428.732482] mmc0: ADMA error [ 1428.732485] mmc0: sdhci: ============ SDHCI REGISTER DUMP =========== [ 1428.732489] mmc0: sdhci: Sys addr: 0x00000020 | Version: 0x00000603 [ 1428.732493] mmc0: ...
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30 views

Logs not appear

My server today crash and I need know the reason. I look inside dmsg log and verify that has a period of time that I do not have log. Why is is happened? logs
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379 views

dmesg is showing apparmor=“DENIED”

I'm following a set of instructions and to validate I need to type the following command: dmesg | grep IOMMU Nothing appears. But then I tried just dmesg and it only shows a lot of the following ...
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1answer
218 views

Clear boot messages and open terminal on TTY1

I updated from Ubuntu Server 16.04 to 18.04 and after all other configuration fixing was done there is still one thing bugging me: On my previous version, after booting, the [ OK ] messages ...
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1answer
6k views

_OSC failed (AE_ERROR); disabling ASPM [closed]

I get this dmesg message, what does it mean? acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM Info: $ uname -a ...
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618 views

USB drive doesn't show up as sdb/sdc

I was trying to install Ubuntu 19.04 with a Live USB drive and ran into some issues where I booted the USB drive and after choosing 'Start Ubuntu withouth installing' in grub it froze at the screen ...
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Slow boot + Weird resolution before login screen

Long story short: Dual booting, Ubuntu 18.04 (on 200Gb partition HDD) and Windows 10 on SSD. Device: Asus ROG G751JL Nvidia Driver: nvidia-driver-418(open source) My issues are: 1)A long boot time(...
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611 views

What is “Unknown pixelformat 0x00000000” in dmesg output

I ran sudo dmesg --follow shortly after rebooting and found these messages at the end of the output. It seems to come out several times. A few lines around that are [ 139.356270] ------------[ cut ...
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141 views

Ubuntu boot time very slow and freezes after suspension

So after updating to 18.10 from ubuntu 18.04 my laptop is booting slowly and some times it freezes and i'm force to reboot My laptop specs some info that might help find the issue. ➜ ~ systemd-...
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1answer
1k views

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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164 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
455 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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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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1answer
1k 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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1k 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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202 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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2k 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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153 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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160 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
4k 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 ...