Questions tagged [dmesg]

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

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ubuntu 22.04: UBSAN: invalid-load of _Bool in mac80211

I upgraded 21.10 (Stock) to 22.04 for an Ausus ROG Strix Advantage Laptop. I Notice this error in dmesg: UBSAN: invalid-load in /build/linux-HMZHpV/linux-5.15.0/net/mac80211/status.c:1164:21 load of ...
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File system becoming read-only at random

for some time now my OS has been switching to read-only mode seemingly at random. Typical fix for this problem was booting from live USB and running fsck /dev/sda3/ and then I could boot up normally. ...
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Linux USB Not Recognized: device descriptor read/64, error -71

I have a USB (SanDisk's Ultra Fit), which has Ubuntu installed in it. It was functioning perfectly well until it suddenly shutdown for no apparent reason. After that, my PC's BIOS won't recognize my ...
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PCIE USB card not working. What's the missing "... resource 0 [io ...]" line in dmesg meaning?

Problem with 4x USB controller PCIE cards seems to be not correctly installed. Situation: We want to use USB Vision cameras with USB adapter cards, providing as much bandwidth as possible. So we tried ...
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TPM showing error message

I have configured TPM for my virtual machine with Ubuntu 18.04. root@Virtual-Machine:~# dmesg | grep -i tpm ==> This should show a proper message root@Virtual-Machine:~# journalctl | grep tpm ==&...
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Can I check log files in Wayland to fix my Ubuntu problem?

I am able to log into Ubuntu Wayland (20.04) but I am having a problem with regular Ubuntu. I have been advised to "read log files like dmesg or syslog". My question is, if I run these in ...
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what can cause my /dev/video* to get deleted (disabling my camera) and how do I fix it?

my integrated webcam suddenly stopped working. Most online advice seem to rely on v4l2-ctl which pulls data from /dev/video0 but apparently this directory does not exist. Some people seem to have this ...
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Takes long time to boot

output of demsg command![Text] output of dmesg command is as follows: 1.941868] usb 1-3: Product: HP Wide Vision HD Camera [ 1.941872] usb 1-3: Manufacturer: SunplusIT Inc [ 1.972306] sda: sda1 ...
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pendrive detected but not shown on ubuntu 20.04

When I plug my Pendrive I hear the sound of it getting detected. output of dmesg [21145.916189] usb 1-1: new high-speed USB device number 11 using xhci_hcd [21146.522765] usb 1-1: New USB device ...
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Some buttons don't work after suspend andresume

dot (.) and functional buttons (brightness) don't work OS: Ubuntu 21.10 x86_64 DE: GNOME 40.5 CPU: AMD Ryzen 7 5700U GPU: AMD ATI 03:00.0 Lucienne kernel: 5.13.0-20-generic Similar question is here ...
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Ledger Nano S - Ubuntu 20.04

I need help getting my Ledger to connect. Currently I am stuck on the verify screen. I am running Ubuntu 20.04 and Ledger Live Desktop 2.33.1-linux-x86_64 I have ran the troubleshooting steps here: ...
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External Disk hangs every diagnostic utilities

I am trying to get back my 1To, exFAT-formatted, external hard drive. I cannot run anything on it or even mount it, everything hangs at a point where I can't even use Ctrl+C to finish it, my only ...
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intel-sdw message in dmesg

I've a Acer Swift 3 laptop running Ubuntu 20.04.2 LTS. Recently I started getting the following message continuously in my dmesg: [ 1850.107303] sdw_cdns_irq: 163616 callbacks suppressed [ 1850.107307]...
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How to fix "xt_hashlimit: size too large, truncated to 1048576" showing in dmesg?

Ubuntu 18.04 Bash 4.4.0 The command dmesg -T shows the following over and over again: [Wed Jul 7 18:24:50 2021] xt_hashlimit: size too large, truncated to 1048576 [Wed Jul 7 18:24:50 2021] ...
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NanoPi with Ubuntu 20.04 LTS installed, turns off by itself

I installed Ubuntu 20.04 on Nanopi NEO Plus 2 and it worked fine, later I installed ROS(Robot Operating System) on it and it begin shutting down by itself after 15-20 minutes. I ran the 'dmesg' ...
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Hard disk: Read-only file system and blk_update_request: I/O error, dev sda (READ)

I performed dmesg --level=err to get the errors that my disk was reporting. I got a long(LONG) list of blk_update_request: I/O error. I'm new to Ubuntu or any Linux-based os ever, So can someone ...
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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 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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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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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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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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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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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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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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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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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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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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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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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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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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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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3 answers
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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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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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1 answer
1k 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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"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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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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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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526 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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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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9k 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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784 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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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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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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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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