Arch Linux

jameh0

Member

Registered: 2013-04-06

Posts: 40

[Solved] Where are boot log messages logged?

I'm trying to troubleshoot why Kernel Mode Setting is freezing my computer on bootup, and I get some messages from nouveau before it freezes when I pass the 'debug' parameter to the kernel commandline, but I'd like to see the log while I'm in a session.

So, how do I see the boot messages from a previous boot?Or are they scattered in different files?

If so, where can I see nouveau log messages or Kernel messages from a previous boot?

(the files in /var/log don't seem to mention nouveau at all, nor does journalctl, but on boot, there are messages stamped with "nouveau")

Last edited by jameh0 (2013-08-17 05:04:15)

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Life is very short, and there's no time for fussing and fighting, my friends.

boast

Member

Registered: 2010-09-28

Posts: 219

Re: [Solved] Where are boot log messages logged?

Should be in dmesg and journalctl

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Asus M4A785TD-V ;; Phenom II X4 @ 3.9GHz ;; Ripjaws 12GB DDR3-1600 ;; 128GB Samsung 830 ;; MSI GTX460 v2 w/ blob ;; Arch Linux + KDE 4.x

jameh0

Member

Registered: 2013-04-06

Posts: 40

Re: [Solved] Where are boot log messages logged?

dmesg only shows me messages from the current boot, not previous boots.

journalctl seems to only show systemd stuff? and not any mention of nouveau.

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Life is very short, and there's no time for fussing and fighting, my friends.

Max-P

Member

Registered: 2011-06-11

Posts: 164

Re: [Solved] Where are boot log messages logged?

Make sure to run journalctl as root, otherwise it will return much less information. If I run it as my normal user, I only get "systemd stuff" too.

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: [Solved] Where are boot log messages logged?

sudo journalctl --since="2013-07-16 18:17:16" --no-pager | grep drm

shows lines mentioning drm that have been logged since yesterday, 6.17 PM.