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#1 2017-11-03 18:01:47

chachi1
Member
Registered: 2017-11-03
Posts: 7

Kernel panic at boot

Since today, the kernel refuses to start, the official one linux-4.13.11-1 and also the linux-ck-core2 4.13.11-1. It says:    Unable to handle kernel null pointer dereference 0000000000000014 (here are the pics: https://ibb.co/nPK0dG and https://ibb.co/bNc0Cb ). I can enter into the recovery mode and everything is fine, I can access my disk and all. At first I thought it was a problem with the fstab file, and it was messed up indeed (it was a directory with a freepats.cfg file inside (?)). I fixed it with genfstab, but the problem remains. I've also tried reinstalling the kernel, but the problem remains. Please, what can I do to fix this?

EDIT: installed linux-lts, works just fine. I guess it's a bug in linux 4.13.11.

Last edited by chachi1 (2017-11-03 18:07:23)

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#2 2017-11-03 18:53:38

loqs
Member
Registered: 2014-03-06
Posts: 17,192

Re: Kernel panic at boot

Welcome to the arch linux forums chachi1.  What Kernel_parameters is the system using in particular is the elevator parameter being used?

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#3 2017-11-03 19:44:43

chachi1
Member
Registered: 2017-11-03
Posts: 7

Re: Kernel panic at boot

Thanks! I have these lines in /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="text acpi_sleep=nonvs elevator=bfq"
GRUB_CMDLINE_LINUX=""

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#4 2017-11-03 19:53:40

loqs
Member
Registered: 2014-03-06
Posts: 17,192

Re: Kernel panic at boot

elevator=bfq

That will cause an oops when the device is not block-mq enabled this issue has been present since 4.12.  https://bugzilla.kernel.org/show_bug.cgi?id=196695
See https://bbs.archlinux.org/viewtopic.php?id=111715&p=127 and the previous 2 pages for discussion relating to this for linux-ck.

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