LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Distributions > Fedora
User Name
Password
Fedora This forum is for the discussion of the Fedora Project.

Notices



Reply
 
Search this Thread
Old 02-21-2012, 12:05 AM   #1
Pedroski
Senior Member
 
Registered: Jan 2002
Location: Nanjing, China
Distribution: Ubuntu 14.04
Posts: 1,384

Rep: Reputation: 42
kernel-debug


I have a bug, which I reported to Redhat bugzilla. Everytime I unplug the dsl cable, my laptop crashes.

https://bugzilla.redhat.com/show_bug.cgi?id=781217

They said I might try to run the kernel-debug package. I don't know what that is or how to run it.

Any tips out there?
 
Old 02-21-2012, 07:33 PM   #2
unSpawn
Moderator
 
Registered: May 2001
Posts: 27,679
Blog Entries: 54

Rep: Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954
Thanks for reporting a bug. Run 'yum install kernel-debug' to install the debug version for your current kernel.
 
Old 02-21-2012, 08:14 PM   #3
Pedroski
Senior Member
 
Registered: Jan 2002
Location: Nanjing, China
Distribution: Ubuntu 14.04
Posts: 1,384

Original Poster
Rep: Reputation: 42
Thanks!

Will that cure this? Or what should I do? I really don't know what I should do with kernel-debug. Read the man page?

F 16 is the worst version of Fedora I ever installed! I never had so many crashes!
 
Old 02-21-2012, 09:18 PM   #4
syg00
LQ Veteran
 
Registered: Aug 2003
Location: Australia
Distribution: Lots ...
Posts: 12,487

Rep: Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077
Installing the package provides kernel, config, initramfs. I only install it for debug (dump) purposes, but presumably it also creates the entry in the boot menu (never really looked ...). Simply boot it.

I would be surprised if it helped, but ya gotta try ...
 
Old 02-22-2012, 12:55 AM   #5
unSpawn
Moderator
 
Registered: May 2001
Posts: 27,679
Blog Entries: 54

Rep: Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954
Quote:
Originally Posted by Pedroski View Post
Will that cure this? (..) I really don't know what I should do with kernel-debug.
No, it will not cure this. If you 'yum info kernel-debug' it displays the purpose of the package in short. As posted in the ticket they want the 'dmesg' output to begin with.


Quote:
Originally Posted by Pedroski View Post
F 16 is the worst version of Fedora I ever installed! I never had so many crashes!
What kind of crashes? The reasons are important to know.
 
Old 02-22-2012, 07:27 AM   #6
Pedroski
Senior Member
 
Registered: Jan 2002
Location: Nanjing, China
Distribution: Ubuntu 14.04
Posts: 1,384

Original Poster
Rep: Reputation: 42
unplug the dsl cable, laptop crashes, or rather, freezes, only the power button can switch it off.

use an overhead projector, laptop won't switch off, screen stays alight.

I have posted what they asked for in bugzilla, but I am none the wiser, and the bug goes on! I have updated almost every day, hoping it would go away! This affects the laptop such that, the only way to get Fedora, or Ubuntu to boot after a crash, is to start Windows. Windows must do a basic reset of the hardware I presume. Then reboot and Linux works! This is a case of Windows saves Linux! I never use Windows, but I left it on the laptop just in case. Good thing I did!
 
Old 02-22-2012, 07:01 PM   #7
unSpawn
Moderator
 
Registered: May 2001
Posts: 27,679
Blog Entries: 54

Rep: Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954
Quote:
Originally Posted by Pedroski View Post
I have posted what they asked for in bugzilla
No, you have not posted the 'dmesg' output running the debug kernel. That is what they asked for.
 
Old 02-22-2012, 07:15 PM   #8
Pedroski
Senior Member
 
Registered: Jan 2002
Location: Nanjing, China
Distribution: Ubuntu 14.04
Posts: 1,384

Original Poster
Rep: Reputation: 42
Ok, that wasn't clear to me.

Neither is 'we need to see the backtrace when it crashes.' What do they want?
 
Old 02-22-2012, 07:27 PM   #9
unSpawn
Moderator
 
Registered: May 2001
Posts: 27,679
Blog Entries: 54

Rep: Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954Reputation: 2954
Quote:
Originally Posted by Pedroski View Post
Ok, that wasn't clear to me.

Neither is 'we need to see the backtrace when it crashes.' What do they want?
See http://www.64k-tec.de/2010/10/gettin...-kernel-panic/ the "Post the panic" part for what a kernel panic will looks like. They'd like that output. (Also see http://www.mulix.org/lectures/kernel...el_oopsing.pdf for an example of what a kernel OOPS might involve but don't let yourself be intimidated by that as it's just an example.) If it's not a kernel issue they'll want you to move to the application level but let's not get ahead of things.
 
Old 02-22-2012, 08:02 PM   #10
Pedroski
Senior Member
 
Registered: Jan 2002
Location: Nanjing, China
Distribution: Ubuntu 14.04
Posts: 1,384

Original Poster
Rep: Reputation: 42
Thanks, I'll get the debug kernel running later today, then unplug the dsl cable, then post the dmesg again.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
debug kernel with gdb bestyharis Linux - Newbie 3 11-02-2011 06:41 PM
hello how debug the kernel with ddd? mjalalynia Linux - Software 1 08-27-2008 05:57 AM
how debug kernel with ddd? how debug the kernel with ddd? mjalalynia Linux - Kernel 2 08-25-2008 07:50 AM
RHEL5 debug kernel unixhack Linux - Kernel 3 12-14-2006 10:27 AM
Driver working with Debug kernel Not with Normal kernel saranjothy Linux - Wireless Networking 1 03-05-2006 10:22 AM


All times are GMT -5. The time now is 08:05 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration