Kernel Panic not syncing, Attempted to kill init

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

Hello

I have prepare portable gentoo distribution on pendrive. I had to include my own custom initramfs because I needed to wait until USB ready.
This is how it looks like:

joanandk · Apprentice Joined: 12 Feb 2017 Posts: 169

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

You are right. Better to double check.

This is output from IBM run from livecd:

joanandk · Apprentice Joined: 12 Feb 2017 Posts: 169

In my script, I have

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

I will try your tip!

but now little update:
Problem is definitely with initramfs. I removed initramfs file from /boot dir.
executed command
grub-mkconfig -o /boot/grub/grub.cfg (root=sda.. appeared instead of uuid in grub.cfg)
and put sda instead of uuid into /etc/fstab
Then all PCs boot correctly even old ACER 5100.

NeddySeagoon · Posted: Mon Dec 04, 2017 4:03 pm Post subject:

joanandk,

You do not need an initrd to boot from USB.

There is a selection of kernel parameters you can use.

rootwait waits for the root filesystem to appear. It will wait forever with no error message, so don't use it for debugging.
rootdelay=<seconds> waits for the given number of seconds then goes ahead anyway.
If the kernel isn't right, it panics in the normal way and the error can help with the fix.

My netbook uses

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

NeddySeagoon · Posted: Mon Dec 04, 2017 4:34 pm Post subject:

pablocool,

Then I misunderstood the problem.

I roll my own initrd and put it together with a kernel provided script.

Its a bit more that you need as it does raid, lvm and separate /usr and /var.
You can chop out the excess.

PARTUUID is better than UUID on the kernel line. The kernel understands PARTUUID=root=...
No initrd required.

PARTUUID is a property of a partition.
UUID is a property of a filesystem.

joanandk · Apprentice Joined: 12 Feb 2017 Posts: 169

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

@joanandk Thank you:) I know LABEL approach, it is definitely nicer than UUID but UUID is not an issue. Read below

@NeddySeagoon that tutorial is pretty cool! How could I had missed that?!

Anyway Guys, I wanted to check what is going on from unpacking initramfs. When booting things go so fast I couldnt notice errors. Only this stopping kernel panic message. I have no idea how to save terminal output but until any FS is ready where to store files before kernel panic? So I used really shame and awful method - I recorded it with phone...

Being really nasty phone method shown me something like

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

https://wiki.gentoo.org/wiki/GCC_optimization#-march

NeddySeagoon · Posted: Tue Dec 05, 2017 9:35 am Post subject:

pablocool,

I don't know what gcc uses for -march with

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

I grabbed make.conf from gentoo livecd. I thought livecd must be totally generic.
My investigation also led me to assumption that

pablocool · n00b Joined: 27 Jul 2017 Posts: 58

mtune=generic solved issue

I'd like to report this important message to author of this wiki

https://wiki.gentoo.org/wiki/Install_Gentoo_on_a_bootable_USB_stick

do you know how to do that?

BR
Paweł

NeddySeagoon · Posted: Fri Dec 08, 2017 9:29 am Post subject:

pablocool,

Make a Wiki account and log in.

Go to the Wiki page
If you know the change to make, you edit the page :)
If not, click on the discussion tab and start a discussion. The wiki will notify contributors to the page about changes to the page or discussion.

Welcome to being a contributing member of the Gentoo community.
I hope its the first of many.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.