Questions tagged [dmesg]

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

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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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After upgrade to 20.04 seeing “RTL871X: There are some pkts to transmit” in dmesg?

Am seeing that message constantly now. Trying to debug other issues like earphones seem to sporadically disappear but noticed this in the logs swamping all other messages.
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powercap intel-rapl:0: package locked by BIOS, monitoring only

I am trying to replace value in the file of constraint_0_power_limit with new value using echo "45000000" | sudo tee constraint_0_power_limit_uw That file is under /sys/class/powercap/intel-rapl/...
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is this a freeze or hibernate causing inability to login?

Having just installed Ubuntu 20.04, I'm thinking this is probably a problem with coming back from a sleep or hibernate type setting, but I just get a blank screen and can't seem to wake the system. ...
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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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193 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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97 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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228 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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88 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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222 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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232 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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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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“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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103 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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Ubuntu 18.04.3 on SD card errors

I have a Dell Latitude 6440 -intel i5-4310 laptop, 8GB RAM disk - SSD. System on SD card - Ubuntu Mate 18.04.3 kernel 5.2.8. with encrypted partition / home. Typing "dmesg" I see these errors: [ 3018....
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What to do with “Couldn't get size: 0x800000000000000e” and “signature not signed with a trusted key”?

I encountered the following errors in Ubuntu 18.04. May I know what they mean? My thoughts and questions: The system has a NVidea graphic card; I suspect those trusted key msgs relates to them, ...
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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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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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131 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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Prevent usb driver from printing dmesg errors about device issues

Some usb port in my computer is faulty, and this spams the syslog, so that when I run dmesg, I get hundreds of lines like this: [13446.886798] usb usb4-port2: Cannot enable. Maybe the USB cable is ...
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237 views

dmesg: ehci-pci: cache line size of 64 is not supported

dmesg gives me this message: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ehci-pci: EHCI PCI platform driver ehci-pci 0000:00:1a.0: EHCI Host Controller ehci-pci 0000:00:1a.0: new USB ...
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_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: $ ...
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439 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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340 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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119 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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403 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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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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207 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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762 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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893 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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“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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1k 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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119 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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125 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
3k 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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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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2k 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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298 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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420 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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710 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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2k 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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916 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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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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1k 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 ...