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Questions tagged [dmesg]

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

dmesg (for "display message" or "driver message" ) is a command on most Linux and Unix based operating systems that prints the message buffer of the kernel.

197 questions
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What is nss-myhostname? And why is it not installable?

dmesg shows the line systemd-hostnamed[3964]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname! But sudo apt-get install nss-myhostname says Paketlisten werden…
user272632
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Are these SATA errors dangerous?

I'm getting these errors ramdomly, and I don't know if its normal or not. [39441.061856] ata3.00: failed to read SCR 1 (Emask=0x40) [39441.061866] ata3.01: failed to read SCR 1 (Emask=0x40) [39441.061892] ata3.15: exception Emask 0x10 SAct 0x0 SErr…
Marcos Junior
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How to speed up really slow boot on Ubuntu 16.04?

I am trying to understand what I need to do to speed up my boot with Ubuntu 16.04. I have run dmesg and saved the output here. It all seems to go wrong after about 10 secs in.
Packwood
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What does perf interrupt mean?

I am working on my computer, trying to write some device code. I checked into dmesg to get some info, and saw this: perf interrupt took too long (2507 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 what does this event mean? Cause?…
j0h
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Booting Paravirtualized Kernel On Bare Hardware

I have been reading dmesg and I found the line " Booting paravirtualized kernel on bare hardware " but I am not using Ubuntu in virtualization I am using it on my laptop DELL N5110 the only OS I have on this machine. Why is it "Booting…
Qasim
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1 answer

ACPI Warning Argument #4 type mismatch

Output of dmesg: http://paste.ubuntu.com/23381803/ In the dmesg, there is the below error: ACPI Warning: \_SB_.PCI0.RP01.PXSX._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150930/nsarguments-95) which seems like BIOS…
Abhishek Bhatia
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cp fails to copy with errors "cp: error reading 'file': Input/output error" and "cp: failed to extend 'file': Input/output error

I'm a user of Oracle Virtualbox on Ubuntu. And I used to copy vdi files as a kind of backup. Previously I did this (copying vdi file and then copying it back) many times without any problem. But today I experienced this error VirtualBox VMs/win_7$…
d.k
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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 daemon is running. Further is it cumbersome to find…
Robert Siemer
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Errors in dmesg - Test WP failed, assume Write Enabled

I'm experiencing some problems with drive cache and I don't know what's causing these problems. This is my dmesg: [11690.011238] sd 6:0:0:0: [sdb] Asking for cache data failed [11690.011248] sd 6:0:0:0: [sdb] Assuming drive cache: write…
mescam
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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 even if they aren't causing obvious issues right…
mock_blatt
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What does wq_busy=1 indicate in a failure to suspend?

After upgrade to 15.10, my laptop no longer suspends. dmesg says […] PM: Syncing filesystems ... done. […] PM: Preparing system for sleep (mem) […] Freezing user space processes ... (elapsed 0.001 seconds) done. […] Freezing remaining freezable…
Edward
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How can I improve my boot time? (bootchart and dmesg output included)

I've noticed that my boot time lately has been unusually slow. I am running 12.04 a laptop with a 2.40GHz CPU and 4GB of RAM. I've run bootchart and dmesg, but I'm not sure how to use them to address the issue. Here's the bootchart: Here's the…
Mandy
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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): apparmor="DENIED" operation="open"…
Bram
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4 answers

Ubuntu 13.10 on Thinkpad slows down dramatically when power adapter is plugged in

When I plug in my power cable -- sometimes -- Ubuntu 13.10 immediately slows down in just about every way. This has been happening for months, but I only recently finally connected the dots, in part because it does not happen in all situations.…
Eric Mill
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7
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1 answer

Dev loop0: unable to read RDB block 8

Every time I boot my laptop I see this warning and from dmesg I get this output: [ 2.895604] Dev loop0: unable to read RDB block 8 [ 2.895641] loop0: unable to read partition table [ 2.895936] loop0: partition table beyond EOD,…
Jorge Eduardo
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