Questions tagged [kernel-panic]

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59
votes
7answers
105k 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 ...
50
votes
2answers
16k 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?
24
votes
5answers
122k 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 ...
19
votes
3answers
2k 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?
18
votes
2answers
17k 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 ...
13
votes
8answers
40k views

How to early configure Linux kernel to reboot on panic?

You can put "panic=N" on the kernel command line to make the system reboot N seconds after a panic. But is there a config option to specify this (other than the default kernel command line option) ...
12
votes
2answers
6k views

How to scroll up after a kernel panic?

While tinkering with a Linux VM I regularly get kernel panics, that push up all the helpful output with stuff I don't understand and that is probably not helpful to me. The panics mostly occur during ...
9
votes
4answers
3k views

Why can't linux kernel boot on my new Intel i7-6500U CPU?

It' hard to isolate the CPU, I know, but the errors I'm seeing suggest that's the issue. This is definitely not a malfunctioning/broken hardware problem. I've been running Windows 10 all day for the ...
8
votes
2answers
15k views

Kernel Panic dumps no log files

I was playing a game on Steam and all a sudden I got a kernel panic. I manually shut down the computer and booted back into Linux Mint 17.1 (Cinnamon) 64-bit, and went to go check through my log files ...
8
votes
1answer
2k 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 ...
8
votes
2answers
2k 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
620 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 ...
7
votes
5answers
13k 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: [...
7
votes
2answers
16k views

perf interrupt took too long but perf not being installed

I just now checked my dmesg because my server starts to crash now and then. There I read the following line: perf interrupt took too long (2528 > 2500), lowering kernel.perf_event_max_sample_rate ...
7
votes
3answers
6k views

Log files for kernel panic on Arch Linux

I have recently updated my Arch Linux machine. Since then, I have been getting kernel panics here and there. (the screen freezes and the status lights on my keyboard are blinking) It seems to happen ...
6
votes
4answers
10k 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 --...
6
votes
2answers
157 views

amd-vi completion wait loop and other errors/messages in my attempt to install Arch Linux on blank SSD

Update 2019-05-21 19:37 EST: My motherboard is on the latest BIOS available, released 2019-03-06, but still has the install problems described below. Update: I burned the Arch ISO to a CD then tried ...
6
votes
1answer
3k 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 ...
6
votes
1answer
358 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
2k views

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

Can a user shove the cause of a kernel panic to the screen?
4
votes
3answers
2k 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
2answers
778 views

Can I make Qemu exit with failure on kernel panic?

I'm trying to add Qemu to my continuous integration pipeline to test various initrd artifacts. I've already discovered that I can run Qemu like this: qemu-system-x86_64 \ -machine q35 \ -...
4
votes
1answer
4k views

How to analyze a kernel panic messages from crash to diagnose problem?

My CentOS 6.8 server is crashing every few days and I'm trying to figure out why. I'm using kernel version 2.6.32-642.1.1.el6.x86_64. So far, I've installed the program, crash, to help me sift ...
4
votes
2answers
1k views

Too many Kernel Panic (6) and Linux installations problems in same computer

I have a Lenovo Thinkpad L440. Core i7 4GB RAM 1TB HDD Windows 7 64 bits installed though right now it has Windows 10. I made space in disk to install Linux Mint. Left: 20~ GB for / 8~ GB for swap ...
4
votes
2answers
34k 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 2013-05-...
4
votes
1answer
338 views

How to solve this kernel bug on OS start?

I just installed a new fresh Ubuntu 12.04.5 on a Dell laptop, I had 14.04 but as I really love 12.04 stability I decided to get back to it. I have a Windows installed alongside which I just keep to ...
4
votes
1answer
1k views

Booting “Linux from Scratch” doesn't bring up # prompt

I have been following A Minimal Linux System from Scratch in order to build a Linux with a small footprint (10MB or less). I'm fairly certain that there were no errors up until the last point, where ...
4
votes
1answer
5k 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. ...
4
votes
1answer
660 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
2answers
5k 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
1answer
14k views

rcu_sched detected stall on CPU

Seen multiple rcu_sched stall messages in a customer device and it gets crashed/hung. Under this condition, the device is not accessible via SSH or 3G. Kernel version is 3.2.54. "rcu_sched detected ...
3
votes
1answer
6k views

Kernel 4.8.7 failure on cpufreq - CentOS 7

After upgrading my CentOS 7 kernel from 3.10.0 to 4.8.7, while rebooting the system I will get the following lines: [ 0.641455] cpufreq: cpufreq_online: Failed to initialize policy for cpu: 0 (-19)...
3
votes
1answer
1k views

Kernel panic after upgrading from wheezy to jessie

I upgraded my system from wheezy to jessie, However, I am not able to boot using the latest kernel that was installed with jessie. I get following error: Loading, please wait... /init: conf/conf.d/...
3
votes
4answers
10k 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
579 views

Linux Slackware ( Broken - kernel panic )

I wanted to update my system (Slackware current) which was in multilib. Before updating, I tried to remove all packages (compat32 and multilib). Big mistake !!! This have broken some crucial symlinks ...
3
votes
1answer
735 views

Removal of HDD causes kernel panic

I recently added a 2nd HDD to a system and then proceeded to do a clean install on to this 2nd HDD of CentOS 6.5. The original system was CentOS 5.9. My plan was to leave the original HDD in place so ...
3
votes
1answer
6k 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
1answer
805 views

How do I detect that my system has auto-rebooted after a kernel panic?

I'm using Linux in embedded systems, and want to configure the system to automatically reboot after a kernel panic. However, when the system comes back up, it's important for me to detect and log the ...
3
votes
2answers
2k 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 ...
3
votes
0answers
389 views

FIPS integrity test failed on RHEL 7.5 with 4.X kernel

I have a Dell PowerEdge R7425 with Intel NVME P4500/P4510 NVME drives. On the 3.10 kernel, the NVME drives throw I/O errors very frequently, and these errors have led to a system halt once already. ...
3
votes
1answer
5k views

How to debug what driver causes a kernel-panic?

After: Fixing recursive fault but reboot is needed on x3850 x6 SLES12 Q: I was thinking that if I get a kernel panic on a linux server, how can I debug, what driver causes the kernel-panic? In my ...
3
votes
1answer
198 views

Kernel panic using logelevel or quiet

I am using an embedded device with onboard storage (mmcblk0). The system is using UEFI (and GRUB), on mmcblk0 I have a GPT partition with 3 partition: root, configurations, swap. My command to boot ...
3
votes
0answers
840 views

Kernel panic - not syncing: Attempted to kill init! during early boot

I am getting Kernel panic - not syncing: Attempted to kill init! during early boot on my Fedora Linux system. Root and home filesystems cannot have been mounted since both are encrypted and I have ...
3
votes
0answers
2k views

How do I fix error “Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block” and “LZMA data is corrupt”

I recently bought a new computer and I am experiencing problems while trying to install Linux. Things I have tried: A variety of distributions: Ubuntu; Elementary OS; Crunchbang++; Manjaro; and ...
3
votes
0answers
626 views

Running a btrfs RAID 5 array on Arch Linux

For two weeks, I've been trying to run my Raspberry Pi (model B) as root from a btrfs RAID 5 without success. The RAID runs on three 1TB disks /dev/sda, /dev/sdb and /dev/sdc. The three disks were ...
2
votes
3answers
6k 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
2answers
7k 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
5k 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
4k 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
1answer
452 views

Ubuntu 18.04 server installation gets stuck at 66% while running'update-grub'

I am trying to install Ubuntu server but it always gets stuck at the last stage while updating grub.I cancelled the process and rebooted my system, it took me to the grub command prompt grub> . I ...