Red Hat Bugzilla – Bug 374411
Unusual kernel messages during boot
Last modified: 2009-11-02 05:14:46 EST
Description of problem:Unusual kernel messages during boot for Dell D610 running
Version-Release number of selected component (if applicable):
How reproducible:Every time
Steps to Reproduce:
1. Boot machine
Actual results:Kernel messages on screen:
Nov 9 17:37:27 localhost kernel: Uhhuh. NMI received for unknown reason a1
on CPU 0.
Nov 9 17:37:27 localhost kernel: You have some hardware problem, likely on
the PCI bus.
Nov 9 17:37:27 localhost kernel: Dazed and confused, but trying to continue
Expected results:Boot should not have these messages
Additional info:Machine is an unmodified Dell D610 laptop. Hardware profile is
This machine was running F7 until yesterday without any issues at all. There
were issues during install being unable to boot the installer - fix was
described as in http://smolts.org/wiki/System/Dell_Inc./Latitude_D620 and this
allowed the install to continue. I don't know if this is related to the bug
being reported here?
/var/log/messages file will be attached shortly.
Created attachment 253851 [details]
This morning I have updated to the new kernel 184.108.40.206-49.fc8. These boot
messages no longer appear!
I will leave this bug open and do further tests this evening. If the boot
messages do not get seen again then I will close this bug.
I also notice that during shutdown there is a message:
Stopping irqbalance - failed
Is this related to the above kernel issues?
I realised my comment #3 is a dumb one! This machine has only one core - but
this failed message when stopping irqalance was reported previously in
development versions (bz 355231) before f8 was released. Therefore ignore #3
Same message kernel being dazed and confused in pops
up now and then in Dell Inspiron 6000
Have received this through FC6, FC7 and now FC8 but no
error so far with kernel 220.127.116.11-49.fc8
Started to receive this in FC6 after I did some hack to get
smoother dvd playback,I cant remember the exact steps i did
nor can I guarantee that this is not an actually HW failure
since I got flammable battery with the laptop.
I was fast enough to remove the battery before the computer
turned on fire, but not fast enough for my hard drive so other
things than the hard drive might have gotten damaged.
Did not need to do the hack in FC7 since dvd playback was smooth..
But the kernel still reported now and then being dazed..
I have always made message == HW failing due to damage done by flammable battery
But this could be related to kernel + motherboard + DVD/CD drive in Dell Laptops
since the first time I received it was after I did some hack to get smoother dvd
Hope this helps....
Thanks for closing this bug - for me it is indeed resolved with the newer kernel
I am getting the same messages on Dell Latitude 810.
Feb 9 23:04:45 kernel: Uhhuh. NMI received for unknown reason b0 on C
Feb 9 23:04:45 kernel: You have some hardware problem, likely on the
Feb 9 23:04:45 kernel: Dazed and confused, but trying to continue
My laptop hang and needs to be hard rebooted. I am using 18.104.22.168-85.fc8 #1 SMP
Fri Dec 7 15:49:59 EST 2007 i686 i686 i386 GNU/Linux
I have not had any further problems with F8 - am currently running
22.214.171.124-115.fc8. The previous kernel was fine also.
Confirmed again on Dell Inspiron 6000
Simple grep through /var/log/messages shows it's still present...
Feb 8 04:55:55 localhost kernel: Uhhuh. NMI received for unknown reason b0 on
Feb 8 04:55:55 localhost kernel: You have some hardware problem, likely on the
Feb 8 04:55:55 localhost kernel: Dazed and confused, but trying to continue
One thing we all have in common ( Me Mike and Mether ) we all have Dell Laptops!
It would be good to get some info on how to debug this further to be able to
nail down the cause of this.
I gladly would like to know if my hardware actually is failing or if this is an
Johannbg to isolate this I installed windows XP ( I know its a bad idea ) and it
seems there is no issue if I use it for hours. System works fine. So looks like
something related to Linux only.
We are using Fedora Core 7 with 2.6.21 kernel and facing a issue in booting.
We have our PCI device on PCI slot and getting below message when system is booting
Uhhuh. NMI received for unknown reason a1 on CPU 0.
You have some hardware problem, likely on the PCI bus.
Dazed and confused, but trying to continue
what could be reason for above display ?