echo c > /proc/sysrq-trigger doesn't reboot the system The 2019 Stack Overflow Developer Survey Results Are In Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election ResultsHow to configure the Linux kernel to reboot on panic?No /proc/sys/fs/binfmt_misc/CLR on my system?sysrq-trigger doesn't accept parameter 'g'kernel: “echo 0 > /proc/sys/kernel/hung_task_timeout_secs”Debugging a “brutal” system hang (no longer responds to Alt+SysRq+B)Does sysrq work when the kernel panic occurs?Reconnecting the systemBoot Debian and Gentoo with Grub. Kernel Panic!Is there a way to automatically save the system state when kernel panic occurs?Crypto CBC module doesn't show up in /proc/crypto
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echo c > /proc/sysrq-trigger doesn't reboot the system
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election ResultsHow to configure the Linux kernel to reboot on panic?No /proc/sys/fs/binfmt_misc/CLR on my system?sysrq-trigger doesn't accept parameter 'g'kernel: “echo 0 > /proc/sys/kernel/hung_task_timeout_secs”Debugging a “brutal” system hang (no longer responds to Alt+SysRq+B)Does sysrq work when the kernel panic occurs?Reconnecting the systemBoot Debian and Gentoo with Grub. Kernel Panic!Is there a way to automatically save the system state when kernel panic occurs?Crypto CBC module doesn't show up in /proc/crypto
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I am trying to collect a core dump in result of kernel panic. Installed and configured kdump, but when executing echo c > /proc/sysrq-trigger, everything just hangs and the reboot doesn't happen. I don't even get any output in the result of running the command. RAM size is 4GB.
The following is the output of `kdump-config show'
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.panic_on_oops=1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0x
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.9.0-dev
kdump initrd:
/var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.9.0-dev
current state: ready to kdump
kexec command:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.9.0-dev root=UUID=b395d695-7bb2-408b-a61b-b5188fc5b900 ro resume=UUID=19e8dc56-ff6d-40de-84ec-b9abd7399591 debug net.ifnames=0 biosdevname=0 ignore_loglevel intel_iommu=on,igfx_off intremap=no_x2apic_optout irqpoll noirqdistrib nr_cpus=1 nousb systemd.unit=kdump-tools.service" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz
Ubuntu 16.04. Kernel 4.9.0
kernel kernel-panic core-dump kdump
edited Aug 13 '18 at 12:45
muru
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
bumped to the homepage by Community♦ yesterday
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I am trying to collect a core dump in result of kernel panic. Installed and configured kdump, but when executing echo c > /proc/sysrq-trigger, everything just hangs and the reboot doesn't happen. I don't even get any output in the result of running the command. RAM size is 4GB.
The following is the output of `kdump-config show'
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.panic_on_oops=1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0x
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.9.0-dev
kdump initrd:
/var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.9.0-dev
current state: ready to kdump
kexec command:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.9.0-dev root=UUID=b395d695-7bb2-408b-a61b-b5188fc5b900 ro resume=UUID=19e8dc56-ff6d-40de-84ec-b9abd7399591 debug net.ifnames=0 biosdevname=0 ignore_loglevel intel_iommu=on,igfx_off intremap=no_x2apic_optout irqpoll noirqdistrib nr_cpus=1 nousb systemd.unit=kdump-tools.service" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz
Ubuntu 16.04. Kernel 4.9.0
kernel kernel-panic core-dump kdump
edited Aug 13 '18 at 12:45
muru
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
bumped to the homepage by Community♦ yesterday
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11
add a comment |
I am trying to collect a core dump in result of kernel panic. Installed and configured kdump, but when executing echo c > /proc/sysrq-trigger, everything just hangs and the reboot doesn't happen. I don't even get any output in the result of running the command. RAM size is 4GB.
The following is the output of `kdump-config show'
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.panic_on_oops=1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0x
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.9.0-dev
kdump initrd:
/var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.9.0-dev
current state: ready to kdump
kexec command:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.9.0-dev root=UUID=b395d695-7bb2-408b-a61b-b5188fc5b900 ro resume=UUID=19e8dc56-ff6d-40de-84ec-b9abd7399591 debug net.ifnames=0 biosdevname=0 ignore_loglevel intel_iommu=on,igfx_off intremap=no_x2apic_optout irqpoll noirqdistrib nr_cpus=1 nousb systemd.unit=kdump-tools.service" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz
Ubuntu 16.04. Kernel 4.9.0
kernel kernel-panic core-dump kdump
edited Aug 13 '18 at 12:45
muru
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
I am trying to collect a core dump in result of kernel panic. Installed and configured kdump, but when executing echo c > /proc/sysrq-trigger, everything just hangs and the reboot doesn't happen. I don't even get any output in the result of running the command. RAM size is 4GB.
The following is the output of `kdump-config show'
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.panic_on_oops=1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0x
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.9.0-dev
kdump initrd:
/var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.9.0-dev
current state: ready to kdump
kexec command:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.9.0-dev root=UUID=b395d695-7bb2-408b-a61b-b5188fc5b900 ro resume=UUID=19e8dc56-ff6d-40de-84ec-b9abd7399591 debug net.ifnames=0 biosdevname=0 ignore_loglevel intel_iommu=on,igfx_off intremap=no_x2apic_optout irqpoll noirqdistrib nr_cpus=1 nousb systemd.unit=kdump-tools.service" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz
Ubuntu 16.04. Kernel 4.9.0
kernel kernel-panic core-dump kdump
kernel kernel-panic core-dump kdump
edited Aug 13 '18 at 12:45
muru
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
edited Aug 13 '18 at 12:45
muru
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
edited Aug 13 '18 at 12:45
muru
37.6k589165
edited Aug 13 '18 at 12:45
muru
37.6k589165
edited Aug 13 '18 at 12:45
muru
37.6k589165
37.6k589165
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
asked May 15 '18 at 20:44
Mr.SrJeneaMr.SrJenea
1
1
bumped to the homepage by Community♦ yesterday
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ yesterday
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11
add a comment |
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11
add a comment |
1 Answer
1
active
oldest
votes
I had the similar issue on Ubuntu 16.04. This set of commands helped me:
sudo -s
kdump-config load
kdump-config unload
answered Aug 13 '18 at 12:38
SBoySBoy
1
add a comment |
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I had the similar issue on Ubuntu 16.04. This set of commands helped me:
sudo -s
kdump-config load
kdump-config unload
answered Aug 13 '18 at 12:38
SBoySBoy
1
add a comment |
I had the similar issue on Ubuntu 16.04. This set of commands helped me:
sudo -s
kdump-config load
kdump-config unload
answered Aug 13 '18 at 12:38
SBoySBoy
1
add a comment |
I had the similar issue on Ubuntu 16.04. This set of commands helped me:
sudo -s
kdump-config load
kdump-config unload
answered Aug 13 '18 at 12:38
SBoySBoy
1
I had the similar issue on Ubuntu 16.04. This set of commands helped me:
sudo -s
kdump-config load
kdump-config unload
answered Aug 13 '18 at 12:38
SBoySBoy
1
answered Aug 13 '18 at 12:38
SBoySBoy
1
answered Aug 13 '18 at 12:38
SBoySBoy
1
answered Aug 13 '18 at 12:38
SBoySBoy
1
1
add a comment |
add a comment |
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-core-dump, kdump, kernel, kernel-panic
It's probably trying to boot the kdump kernel/initrd and freezing while doing so... To troubleshoot that, you probably need to look at the console attached to the machine to see where it is failing... Is this a machine to which you have physical access to? Or a virtual machine? Or do you somehow have access to a serial console (for example, if it's a server in a colocation)?
– filbranden
May 15 '18 at 22:56
I have a physical access to it
– Mr.SrJenea
May 15 '18 at 23:11