Fedora :: Kernel:Uhhuh. NMI Received For Unknown Reason B1 On CPU 0 Kernel
Mar 18, 2010
I've been using Fedora 12 for about a month, and i'm very happy with it. Even tough, there's only one thing that worries me, and is giving me problems at the same time. I'm getting an error from: syslog@localhost that says: kernel:Uhhuh. NMI received for unknown reason b1 on CPU 0 kernel: Dazed and confused, but trying to continue. Kernel: seems to be a problem, likely on the PCI Bus
I'm not able to reproduce the problem every time i want, but, sometimes happens when i activate the snow effect combined with the cube effect, using kwin. My computer and OS specifications are: Pentium IV HT(disabled) Nvidia Geforce 8400gs 2 Gb Ram DDR2 (1xGB, 2x512) Hard Drives: 2x80GB Using Fedora 12, KDE 4.4.1, with Nvidia privative drivers, nouveau disabled
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Feb 17, 2011
i have continue found below message on server rhel 4.5(ent) Uhhuh. NMI received for unknown reason 31 on CPU 0. Feb 14 16:15:01 fe2012 kernel: Dazed and confused, but trying to continue Feb 14 16:15:01 fe2012 kernel: Do you have a strange power saving mode enabled?
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May 20, 2010
Im having a hanging problem with a HP dl160g6. uname -a shows:
Linux mail.xxxxx 2.6.18-194.3.1.el5 #1 SMP Thu May 13 13:08:30 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
The server was working fine since November �09 until a month or 2 ago.Sometimes (almost daily now) the machine hangs and shows the front "health led" blinking red.The services do not respond,locally i can see the login screen but when attempt to logon it freezes (the same happens with ssh).2 weeks ago i open a case in HP and the support sugest that the problem is in the X server (??), since then the system starts in runlevel 3 but the problem continues. A week ago open another case, on Tuesday make a BIOS upgrade but today in the morning the server hangs again.
There�s no strange messages in log files but... after the Tuesday hungs (before the upgrade) i can see the error msg below (thanks to the change to console mode):
Uhhuh. NMI received for unknown reason 30.Dazed and confused, but trying to continue.Do you have a strange power saving mode enabled?
Uhhuh. NMI received for unknown reason 20.Dazed and confused, but trying to continue.Do you have a strange power saving mode enabled?
adding "nohpet" as kernel parameter does not work.
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Nov 25, 2010
My server started to throw the following errors at me:
Quote:Message from syslogd@ at Wed Nov 24 22:17:13 2010 ... server kernel: Uhhuh. NMI received for unknown reason 2d.
Message from syslogd@ at Wed Nov 24 22:17:13 2010 ... server kernel: Do you have a strange power saving mode enabled?
Message from syslogd@ at Wed Nov 24 22:17:13 2010 ... server kernel: Dazed and confused, but trying to continue
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Mar 4, 2010
I have just installed Fedora 11 to my laptop and it appears I am in trouble. I have received two kernel failure messages, which I post below. What are the consequences of these issues and how can I solve them ?
Message 1:
Message 2:
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Aug 20, 2011
i was compiling and installing the new linux kernel for my debian box, i ran the commands
# make oldconfig
# make clean
# make DEB_PKGVERSION=custom.3.0 deb-pkg
# cd ..
# dpkg -i *.deb
i tried to install the new kernel which was made into debian packages ready to be installed and after i ran that last command this is what came up
dpkg: error processing linux-firmware-image_custom.3.0_amd64.deb (--install):
package architecture (amd64) does not match system (i386)
dpkg: error processing linux-headers-3.0.3_custom.3.0_amd64.deb (--install):
package architecture (amd64) does not match system (i386)
[Code]....
where do i make this work, my architecture is an amd64 but for some reason it's only going to install this kernel on a i386 system.
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Jul 23, 2010
I just installed the DVD iso of Fedora 13...and did a "sudo yum update" after the installation got finished. After 3 hours of waiting, I restarted. I was greeted by Fedora with a kernel panic, right after it boots up.
Here's the message:
Code:
Kernel Panic - not syncing: VFS unable to mount root fs on unknown-block (0,0)
EDIT: Here's the content of grub.conf
Code:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
[code]....
What is peculiar on this grub.conf, is that the 2.6.33.6-147 boot conf is missing an initrd line...I looked in the /boot directory...and I found out that the initramfs file that matches the 2.6.33.3-147 kernel is also missing (i.e initramfs-2.6.33.3-147.fc13.i686.PAE.img).
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May 10, 2011
My Fedora 14 box is no longer starting. I am getting a message at startup - "Kernel panic - not syncing:
VFS: Unable to mount root fs on unknown-block(0,0)".
Unfortunately, I don't know what I did before I got the message. I mean, I have made various installations, including some kernel drivers (such as a wifi card and a sound card). Also I did need to update the kernel-devel package as a requirement for some install or other. I know that is not very helpful, but let's get to the important bit...
What does the message "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" mean? What has broken?
And how does on recover from it? I have been reading around, and of course I am able to boot the machine from a live CD, but I am not sure what I should do with grub.conf, what I should rebuild, how to do it and so on.
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively), swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead.
Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively) , swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead. Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Feb 1, 2010
I just installed a fresh copy of Fedora Core 12 on a system. I have a 1 GB swap partition, a 20 GB root partition and a 50 GB /video partition (for a mythtv system I am building).
Installation went fine, but upon the initial boot, I get:
Kernel panic - not syncing: vfs: unable to mount root fs on unknown block (0,0)
I can boot off the FC12 cd and go to the rescue option and get to a shell, but not sure where to go from
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Oct 14, 2010
I am running FC13 on a fairly old PC (PIII 500MHz, 384MB RAM, 10GB SCSI disk). It works fine using kernel 2.6.33.5-112.fc13.i686.PAE. After a series of recent updates the system now also has a new kernel 2.6.34.7-56.fc13.i686.PAE.
/boot/conf/grub.conf contains:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
code....
When I try and boot to the newer kernel I get an error like:
Kernel panic - not syncing VFS Unable to mount root fs on unknown block(0,0)
I read on the forum about a similar problem where the fix was to insert the line
initrd /initramfs-2.6.34.7-56.fc13.i686.PAE.img
but this file doesn't exist and so the boot then hangs with no messages, so I took this line out again. Here is contents of /boot:
$ ls -l
total 21148
-rw-r--r--. 1 root root 111391 May 27 04:06 config-2.6.33.5-112.fc13.i686.PAE
-rw-r--r--. 1 root root 112291 Sep 15 04:32 config-2.6.34.7-56.fc13.i686.PAE
drwxr-xr-x. 3 root root 1024 Jan 23 2010 efi
code....
As you may deduce from the above I haven't used the system much so the auto-update hasn't run for several months.
Any help on running / installing the newer kernel appreciated. Note that I am trying to install a wireless LAN card and am following instructions here: url
I got as far as
cd /lib/modules/`uname -r`
ls -l
which gave:
[root@localhost 2.6.33.5-112.fc13.i686.PAE]# ls -l
total 3300
lrwxrwxrwx. 1 root root 51 Jun 3 00:52 build -> ../../../usr/src/kernels/2.6.33.5-112.fc13.i686.PAE
drwxr-xr-x. 2 root root 4096 May 27 04:08 extra
drwxr-xr-x. 11 root root 4096 Jun 3 00:52 kernel
code.....
so I have the src files for the newer kernel not the one I am running. I thought it best to stop and think (and ask for help!) rather than break a working machine (but with no wireless LAN!)
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Dec 5, 2009
I have a Compaq Presario 8000 with an Nvidia Geforce FX 5950 Ultra on which a year ago I upgraded from Fedora 6 to Fedora 9, and this broke the Nvidia driver, since Fedora 9 was shipped with an X server incompatible with Nvidia. I went back to the 2d driver to get X working, and it sat that way for the past year. But recently I wanted to do some 3D work and decided to install Fedora 12, which hopefully has an X server that works with Nvidia.
I decided to do a cold install, re-partitioning my 80G hard drive at the same time. I backed up my data, ran the install CDs with no errors, and booted the system, with an immediate kernel panic: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Doing a Google search, I found over 8,000 hits for that message combined with the keyword Fedora. Several of the hits were on Bugzilla: [URL] I then booted the install disk, chose rescue mode and did - chroot /mnt/sysimage
[Code]....
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Sep 16, 2010
i'm using this guide videos - howto: debian linux kernel compilation, part 1 and the author says i need kernel 2.6.26 this version of kernel doesnt longer exist in kernel.org website and the only 2.6.26 i found is a patch here. should i use the patch? or download another version of kernel?
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Jan 18, 2010
My laptop has only 2GB of RAM so I don't think I need the PAE kernel, also there are some drivers that I want to install, they were built for non-PAE kernel.
So far I read that I have to change the :
/etc/sysconfig/kernel
---------
# UPDATEDEFAULT specifies if new-kernel-pkg should make
# new kernels the default
UPDATEDEFAULT=yes
[Code]....
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Jul 4, 2010
my problem is on installing nvidia driver on fc12 32bit but, first of all, as i understood the pae kernel requires more than 4gb of ram,i have a 2.2 ghz cpu with 2 gb ram,but when i run command:uname -r it answers: 2.6.31.5-127.PAE [i have fc12 32 bit] when we try to download linux we have a 32bit edition or 64bit edition,do we have an edition which is only for pae? or when we install for example the 32bit edition on a computer with more than 4gb of ram then the kernel automatically will change to be a pae kernel??
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Jul 13, 2009
I'm I seeing this wrong or is the initrd file in kernel-2.6.27.25-170.2.72.fc10.x86_64 a zero byte file and that's why I can't boot with it( get this "kernel panic not syncing VFS unable to mount root fs on known -block (0,0)" message)
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Apr 21, 2010
Trying to install virtualbox in F12 but fails when recompiling kernel module. Output of vbox-install log is:
Attempting to install using DKMS
removing old DKMS module vboxdrv version 3.1.6
Deleting module version: 3.1.6
completely from the DKMS tree.
Creating symlink /var/lib/dkms/vboxdrv/3.1.6/source ->
/usr/src/vboxdrv-3.1.6
DKMS: add Completed.
Error! Your kernel source for kernel 2.6.32.11-99.fc12.i686.PAE cannot be found
at
/lib/modules/2.6.32.11-99.fc12.i686.PAE/build or /lib/modules/2.6.32.11-99.fc12.
code....
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Nov 29, 2010
i want to compile the vanilla kernel 2.6.37-rc3, but i want to obtain a .rpm file. I found this guide long time ago (i used it many times) but it use src.rpm package and the contained kernel.spec file have many lines for adding patches. Someone know where can i download a kernel.spec for vanilla kernel or a guide to obtain an rpm file
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Feb 23, 2011
I have installed the fedora 14, but there is no kernel source tree.I read the doc "building a custom kernel".But I don't want to rebuild a new kernel.I just want to install the source tree of current kernel.Could someone tell me the way?
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Apr 23, 2011
i have tried going through this old post but its still not working ... tried googling but i do not seem to find any conclusive solution for this. [URL]i am getting this error during boot time:
Apr 23 15:43:57 ftp kernel: hda: status timeout: status=0xd0 { Busy }
Apr 23 15:43:57 ftp kernel: ide: failed opcode was: unknown
Apr 23 15:43:57 ftp kernel: hda: no DRQ after issuing MULTWRITE_EXT
Apr 23 15:43:57 ftp kernel: ide0: reset: success
there is no immediate effect due to this but after sometime the HDD goes in read-only mode. have tried changing bios setting from IDE to AHCI, did a disk check using hiren boot disk which did not give any errors.even now the error still persists. Linux 2.6.18-164.el5PAE #1 SMP Thu Sep 3 04:10:44 EDT 2009 i686 i686 i386 GNU/Linux CentOS release 5.4 (Final) i know i should probably upgrade my kernel but i see people with latest kernel also facing the same issue (mostly with samsung hdd but mine is seagate)
hdparm -I /dev/hda ------------
/dev/hda:
ATA device, with non-removable media
Model Number: ST380215AS
Serial Number: 6QZ6ENV1
[code]...
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Jun 12, 2009
there is an issue with the way the Linux Kernel addresses memory by default and the graphic drivers for my Asus G1Sn. I have a patch that I had compiled against a custom kernel for 2.6.27.xx how ever it does not work with the latest kernel in Fedora 11. It is beyond me to rewrite the patch to work with a different kernel.
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Feb 11, 2010
I use a pretty fresh installed RHEL 5.4, which should be very similar to Fedora. After the basic installation I installed xen and xen-kernel via yum with no errors. I can select the xen-kernel at boot time. But after booting the normal kernel shows up.
[root@noname boot]# uname -r
2.6.18-164.11.1.el5
My /boot/grub/menu.lst looks like:
default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
[code]....
I can't see anything wrong and I did not change/try anything.
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Jul 18, 2010
From F12 to F13. Is there anything I should remove before updating? I have few programs isntalled from source/binary installers in /usr for example. Would it cause problems?
And is there any chance to be able to switch from a 32 bit kernel to 64 bit kernel during the update? The hardware is capable of this.
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Aug 22, 2011
I used Backtrack 5 and Fedora, basically I'm trying to install my wireless card but I don't have these installed to make && sudo. I burned the iso images for backtrack and fedora and booted my computer from them but can't figure out how to install kernel-devel on backtrack for example. I dled yum onto my flash drive but can't figure out how to install it.
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Feb 22, 2010
What's the command for installing kernel headers for the currently installed kernel?
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Jul 30, 2011
I used make-kpkg to generate bzImage from 2.6.39-3-686. After update-grub and booting the new vmlinuz system. I get:
"kernel panic - not syncing:
VFS: unable to mount root fs on unknown block(0,0)".
grub.cfg shows new entry
'linux/boot/vmlinuz-2.6.39.3-686 root=/dev/sda1 ro quiet'
but previous working shows
'linux/boot/vmlinuz-2.6.32-5-686 root=UUID=210a363d-c0ed-4005-b6e8-bbc
aeb7abe54 ro quiet'
Am I missing a step? (or two?). Is it possible to do this from 2.6.32? Currently running Debian-6.0.2.1-i386-DVD-1, Squeeze, /release/current/ 20110626-15:45 on a SATA 1T hd.
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Feb 20, 2010
I just installed the latest kernel today and reinstalled the nvidia driver using " nvidia driver in F12 using the run method." [url]
I boot in X properly and then the automatic bug reporting tool icon showing witht he following error:
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Jul 26, 2010
If i use yum update option it upgrades to latest kernel but i only want to upgrade to kernel-2.6.31.6.
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Feb 2, 2010
I'm using Ubuntu 9.10 through Windows 7 and got this message today...
kernel panic- not syncing VFS: unable to mount root fs on unknown block (8,1)
Is there a way to fix this? (and I'm going to need really simple instructions here)
Also I tried to uninstall ubuntu in windows 7 and then reinstall but it will not let me. it says that an error has occurred: The system cannot find the file specified stdout=
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