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27
votes
2answers
939 views

What's the difference between a kernel oops and a kernel panic?

I know what a kernel panic is, but I've also seen the term "kernel oops". I'd always thought they were the same, but maybe not. So: What is a kernel oops, and how is it different from a kernel panic? ...
14
votes
3answers
660 views

What is a “kernel panic”?

What does it mean when your computer has a "kernel panic"? Does it equate to the windows BsoD? Also, what methods, tips, tricks are available to the user when a kernel panic strikes?
8
votes
3answers
4k views

How to cause kernel panic with a single command?

Is it possible to cause a kernel panic with a single command line? What would be the most straightforward such command for a sudoing user and what would it be for a regular user, if any? Scenarios ...
8
votes
2answers
4k views

How to investigate cause of total hang?

My Arch machine sometimes hangs, suddenly not responding in any way to the mouse or the keyboard. The cursor is frozen. Ctrl-Alt-Backsp won't stop X11, and ctrl-alt-del does exactly nothing. The ...
8
votes
2answers
781 views

Kernel Panic because of RAM stick?

one of my RAM sticks causes a Kernel Panic on my Ubuntu 10.10 (something like "not syncing" with a lot of memory adresses shown on screen). It's definitely this one RAM stick and not its socket ...
8
votes
2answers
547 views

Any relatively new binary distro causes kernel panics

I'm having trouble using any relatively new binary distro on this machine. The last binary distro to work without issue was Ubuntu 8.04. I'm currently using Gentoo with the latest 3.2.1 kernel and ...
6
votes
4answers
13k views

Determining cause of Linux kernel panic

I'm running an Ubuntu 12.04 derivative (amd64) and I've been having really strange issues recently. Out of the blue, seemingly, X will freeze completely for a while (1-3 minutes?) and then the system ...
6
votes
1answer
896 views

Trouble Logging Kernel Panic for Debugging

I'm running Ubuntu 12.04 on AWS/EC2 and having a large number of hosts going belly up. I'm trying to enable kernel dumping, but when I simulate a kernel panic, there's no .crash file written anywhere ...
6
votes
1answer
225 views

Untraceable stability problem of 3.6.8 kernel on ASUS P53E

Randomly, but not later than after 10 hours of work, the laptop freezes. Just freezes. Knowing that not all hardware errors are reported back to the user I tried the netconsole. Unfortunately the ...
5
votes
5answers
237 views

Is there a way to shove kernel-panic to the screen?

I know this may seem, well stupid, but can a user shove the cause of a kernel panic to the screen?
4
votes
3answers
514 views

Does the linux kernel (specifically 2.6 onwards) have any recursive function?

Given the limited fixed size of kernel stack, my guess is that although theoretically we might have a recursive function if its recursion doesn't go too deep, pragmatism would suggest to do away with ...
4
votes
1answer
916 views

How can I use netconsole to help solve a kernel panic?

When I try to use a raid as root, my system panics. I want to read the kernel output right before the panic, but can't scroll up. After Googling a bit, I wanted to try netconsole. but I get no output ...
4
votes
1answer
189 views

Using a custom name for root device in GRUB

I'm working on old distro ( slackware 8.1 ) using a kernel 2.4.37.9 and I have the following problem. I want to use a custom name for boot device, say for example /dev/root1, which can replace the ...
3
votes
4answers
4k views

Configure reboot on Linux kernel panic

You can put "panic=N" on the kernel command line to make the system reboot N seconds after a panic. Is there a config option to specify this (other than the default kernel command line option)?
3
votes
3answers
156 views

Random restarts caused by a machine check exception

My laptop restarts randomly about twice a day. It shows the following error log before the restart. . Unfortunately I don't have an idea how to decode the Machine Check Exception (MCE). mcelog ...
3
votes
4answers
2k views

How to determine which module taints the kernel?

My kernel keeps panicking when connected to a certain wireless network. I'd like to send a bug report but my kernel is apparently tainted. From /var/log/messages: Apr 17 21:28:22 Eiger kernel: ...
3
votes
2answers
2k views

Kernel Panic - Can't find root filesystem / error mounting /dev/root

From here: http://fedoraproject.org/wiki/Common_kernel_problems#Can.27t_find_root_filesystem_.2F_error_mounting_.2Fdev.2Froot A lot of these bugs end up being a broken initrd due to bugs in ...
3
votes
2answers
1k views

kernel panic Hardware Error - what hardware is responsible?

I'm having kernel panics every other day. below is a transcript of a photo of the console. How do I determine what hardware is responsible for the problem? (or is it software) Ubuntu 12.04 LTS ...
3
votes
1answer
3k views

How to understand the kernel panic core dump output?

This is the output I get when I run one of my applications: Kernel bug detected[#1]: Cpu 0 $ 0 : 00000000 00000000 0fffff00 0fffff00 $ 4 : c6800000 850b7780 8b0043c0 00000040 $ 8 : 000004ac ...
3
votes
2answers
642 views

Ubuntu 10.04 can't boot, kernel panic

I downloaded pcap source compiled it and got a lib ending in libsomething.so.1.21.1. I tried to find how to install a lib online and in my impatience did the following sudo .install-sh /lib ...
2
votes
2answers
311 views

Where is 'kernel panic' used?

Is the name kernel panic being used outside of Linux-based systems?
2
votes
3answers
275 views

Intentional kernel panic under Linux?

Is there any way to cause a kernel panic under Linux? I've heard of echo c > /proc/sysrq-trigger but it seems to just freeze, and I'm not sure it's a kernel panic. Is there any C program I can ...
2
votes
1answer
2k views

Hotplug area too small error

I have VM running under RHEL6, which is running under HyperV. It has a lot of important soft installed, but does not have suffocating workload (~10% CPU is used). It's been really unstable recently ...
2
votes
2answers
217 views

Troubleshooting kernel panic — next steps after analyzing `crash` dump

I'm running an Ubuntu 12.04 machine with an Intel i7 CPU. Every now and then, it freezes up completely -- the machine and display stay on for a minute or so, the audio that was playing (if any ...
2
votes
1answer
149 views

Know when a memory address is aligned or unaligned

Im getting kernel oops because ppp driver is trying to access to unaligned address (there is a pointer pointing to unaligned address). Im not sure about the meaning of unaligned address. It means not ...
2
votes
1answer
735 views

Fedora 19 (Schrödinger's cat) gets stuck on boot

When I installed Fedora, it did not have the Schrödinger's cat boot option, but then I installed a bunch of updates and now it is there. What is even more annoying is that it is the default boot ...
2
votes
1answer
385 views

Kernel panic in Fedora 18 after updating to kernel-3.9

I'm really a beginner in Linux, I've installed Fedora 18 and did yum update to update my system. I got a bunch of updates (around 350 MB download), among them is kernel-3.9.4-200.fc18.x86_64. Now, ...
2
votes
2answers
2k views

How to repair system if kernel panic?

I've just updated packages: 2013-05-23 11:15:34 startup archives unpack 2013-05-23 11:15:35 upgrade locales:all 2.13-38 2.17-3 2013-05-23 11:15:35 status half-configured locales:all 2.13-38 ...
2
votes
1answer
42 views

Kernel Panic on 3.14.0-gentoo on an IBM 9228LGA / SMP Stack Trace

So I've spent the past weekend trying to get this IBM Xeon server up and running. I also took this opportunity to try and get a bootable GPT/Grub2/BIOS setup going. I am able to get the kernel ...
2
votes
2answers
136 views

How to edit grub2 to use kdump?

I was following http://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes and in step 2 I need to add the line to grub.cfg, but grub.cfg is a shell I do not know how to edit it, most ...
2
votes
1answer
1k views

How to debug Linux kernel panic?

I am trying to debug a kernel panic. Panic message says unable to handle kernel paging request for address 40025694. At the time of panic it was executing ldreq r10, [lr, #-4] @ get SWI instruction. ...
2
votes
0answers
148 views

What changed between kernels 3.7 and 3.9 that affects LVM/RAID root file systems?

I'm trying to fix a (very messy) system that the user hosed by running a kernel upgrade from 3.7.10 to 3.9.6. the root file system is on an LVM volume on top of a software RAID array. The boot manager ...
2
votes
0answers
681 views

How to troubleshoot kernel panic on boot

I'm trying to run Debian Linux on a Nokia IP710 firewall, but I can't get it to boot correctly: kernel panic every time. The firewall has a Pentium III 1Ghz and 512MB RAM. It has no vga, a very ...
1
vote
1answer
63 views

What are the ways to improve system stability and prevent data loss in conditions of frequent hard reboots and/or kernel panics?

Suppose we are working in environment where you can't be sure that your computer won't just suddenly shut off. What measures can be taken to improve system's (unix) resist to such failures? And how to ...
1
vote
1answer
3k views

Linux Mint does not shut down

Sometimes (very rarely actually) I have a problem that when I try to shut down my desktop, it will freeze with the following screen and I can only shut it down by pressing the power button for 8 ...
1
vote
1answer
2k views

What to do after a kernel panic on AIX?

There was a "kernel panic" - at least sort of. errpt | head IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION A6DF45AA 1205044411 I O RMCdaemon The daemon is started. 67145A39 1205044111 ...
1
vote
1answer
3k views

RAMDISK incomplete write error kernel panic

I am building Linux Kernel 2.6.36.4 on a Dell Laptop which has Linux Kernel 2.6.35.11 running. BTW I got the source from kernel.org. The source had few syntax errors which I fixed in the process and ...
1
vote
1answer
66 views

Behavior of filesystem when mount option has been specified as error=panic

Background I have a debian system on which I have something like the following in the fstab file. /dev/sda1 / ext3 defaults,noatime,errors=panic 0 0 The option I wish to focus on is the ...
1
vote
1answer
351 views

XBMCbuntu freezes at random intervals

I have a Gateway GM5474 which is running XBMCbuntu on a 500GB Hard drive (the originial I believe or maybe slightly newer hard drive). Little background: The system is still stock, and I was having ...
1
vote
2answers
1k views

Linux Mint 64-bit Kernel Panic on Boot

I'm trying to install 64-bit Maya on the new Macbook Pro with Retina Display using a Bootcamp partition. The trouble is that I get a kernel panic similar to the one below on live cd boot or usb boot. ...
1
vote
1answer
833 views

Red Hat Kernel Upgrade problem

I'm using a Red Hat 4 Enterprise Linux. But, when I upgrade the kernel, an error occurred. And after, when computer is booting with new kernel (red hat enterprıse 2.6.9-100.el), I receive the ...
1
vote
1answer
257 views

Debian 7 - Kernel Panic after libc6 update

I installed and configured Debian 7.2 Wheezy AMD64 few days ago, I spent days configuring everything out and installing useful apps etc, so finally I tried to install Wine. And what happened? ...
1
vote
0answers
118 views

IOMMU causing freezes, disabling causes USB to not work

I'm somewhat new to linux, but I'm running a Xubuntu machine that I recently built. Since I started it up, I had noticed frequent freezes, where both the screen (if plugged in) and any SSH session ...
1
vote
0answers
121 views

May have broken a Debian installation: 'sudo dpkg --configure -a' won't run

I did an apt-get upgrade on my Jessie vps, hosted by DigitalOcean. As many people know, DigitalOcean provides kernels from the host, rather than allowing the VM to boot from its own kernel image. ...
1
vote
1answer
91 views

Kernelpanic Fedora 18 with kernel 3.9.2-200

Since upgrading to kernel 3.9 I now get this error every time at start up: BUG: unable to handle kernel NULL pointer dereferences at (null) IP[<ffff8800ca93bfcd>] 0xffff8800ca93bfcc PGD 0 ...
1
vote
0answers
70 views

What kind of crash would crashdump fail to capture?

A freshly built machine running Ubuntu 12.10 64bit is hanging under seemingly random conditions. To debug this I've installed linux-crashdump, confirmed that the second kernel is loaded and a ...
1
vote
0answers
343 views

Editing isolinux leads to kernel panic error in Centos Live CD

I downloaded a CentOS Live CD and tried to customize features on it. The CD boots fine if I use it "as-is". If I edit "isolinux.cfg" to edit the change the title of the CD or the automatic boot time, ...
1
vote
0answers
498 views

Fedora 17 not booting

I just got GRUB to properly set the resolution, thanks to this wonderful answer. After selecting Fedora 17 and waiting a bit, this displays: [ 0.752888] [Firmware Bug]: powernow-k8: No compatible ...
0
votes
1answer
121 views

Arch installation and swap partition

to install Arch on a PC I have to make partition of the HDD boot swap / The swap is used by virtual memory, right? What's up if I make a too small or a too big swap partition? Could I have as ...
0
votes
1answer
69 views

Why does boot from SD card with my custom kernel result in “VFS: Cannot open root device”?

I'm using an embedded board ARM9 SAM9G25. I want to boot from SD card. When I build a linux kernel with a built-in rootfs (initramfs) then it boots. I want to separate the kernel from rootfs and I ...