Arch Linux

nikaido

Member

Registered: 2016-12-01

Posts: 11

Kernel Panic on first boot

[    0.604352] Call Trace:
[    0.604418]   [<ffffffff812fdf50] dump_stack+0x63/0x83
[    0.604489]   [<ffffffff81175de5] panic+0xe4/0x266
[    0.604557]   [<ffffffff81b235b2>] mount_block_root+0x28a/0x2c5
[    0.604626]   [<ffffffff81b228db>] ? set_debug_rodata+0x12/0x12
[    0.604695]   [<ffffffff81b23652>] mount_root+0x65/0x68
[    0.604762]   [<ffffffff81b23784>] prepare_namespace+0x12f/0x167
[    0.604832]   [<ffffffff81b231e0>] kernel_init_freeable+0x1e2/0x1f9
[    0.604904]   [<ffffffff815eb17e>] kernel_init+0xe/0x100
[    0.604972]   [<ffffffff815eb17e>] ret_from_fork+0x1f/0x40
[    0.605041]   [<ffffffff815eb170>] ? rest_init+0x90/0x90
[    0.605120] Kernel Offset: disabled
[    0.605182] ---[ end Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

So, I just installed Arch onto my laptop's slave drive (/dev/sdb) using the installation guide in the wiki, then I went to the distro controlling the laptop's Grub bootup (LXLE on /dev/sda) and updated grub using the update-grub command and got this error when I tried to boot into Arch. When that didn't work I tried the grub-mkconfig -o /boot/grub/grub.cfg command and got the same error.

Any help would be appreciated.

Last edited by nikaido (2016-12-04 02:14:57)

alex.theoto

Member

From: Athens Greece

Registered: 2014-11-30

Posts: 307

Re: Kernel Panic on first boot

At grub-mkconfig, verify that you point the right partitions.
First re-create your mbr, install os_prober and then update with grub-mkconfig.

EDIT: Is it bios of uefi system?

Last edited by alex.theoto (2016-12-04 13:43:20)

Pineman13

Member

Registered: 2016-12-04

Posts: 26

Re: Kernel Panic on first boot

I'm no kernel-guy myself, but why don't you try and boot from whichever installation media(a USB stick) you used to install Arch and try fixing grub from there?
Mount your LXLE /boot partition(for instance at /mnt/boot)
Attempt

grub-install --boot-directory=/mnt/boot /dev/sda

and then do

grub-mkconfig -o /mnt/boot/grub/grub.cfg

That should fix it for you. If on that step grub will somehow fail to detect your other system(LXLE), you will need to manually add it to the grub.cfg

nikaido

Member

Registered: 2016-12-01

Posts: 11

Re: Kernel Panic on first boot

EDIT: Is it bios of uefi system?

Bios. My Aspire E5-573 has both a Legacy (traditional bios) and a UEFI setting. Currently using firmware version 1.31, still need to upgrade to 1.35.

Last edited by nikaido (2016-12-04 15:50:13)

seth

Member

Registered: 2012-09-03

Posts: 51,213

Re: Kernel Panic on first boot

look at the last line, google it - you'll also find results in this forum.
cause is usually either
* broken grub config
* root partition not flagged bootable
* bad installation (initramfs lacks or uses modules of another kernel version)

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nikaido

Member

Registered: 2016-12-01

Posts: 11

Re: Kernel Panic on first boot

Thank you for giving me a list of possible causes to investigate. It makes things a lot easier.