[SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

kramlegan · 2014-08-15 05:54:30

I am hoping I am just missing something simple with this.

After upgrading my laptop today from 3.15 to 3.16 my network adapter and Xorg stopped working.

Network adapter is giving me the error:
timed out wating for device sys-subsytem-net-devices-ens5.sevice
And Xorg is giving me:
(EE) No devices detected
(EE) no screens found

Well I have been googling around and checking out the Arch forums and came across a thread with the same Xorg error. When I was typing my response to it I realized:

uname -a
Linux MacBook 3.15.8-1-ARCH #1 SMP PREEMPT Fri Aug 1 08:51:42 CEST 2014 x84_64 GNU/Linux

What did I miss that the new kernel is not loading?

I am using Grub2 as a boot loader.

Last edited by kramlegan (2014-08-15 14:42:00)

ewaller · 2014-08-15 06:14:50

I assume you rebooted.
Was your boot partition mounted on the /boot mount point when you upgraded the kernel? If not, the new kernel was written to /boot by pacman, but the boot partition would remain unchanged. Note that if it was not mounted, you should be able to look in /boot and see the new kernel. Then, if you mount the boot partition and you look in /boot, you will see the contents of your (unmodified) boot partition, and your new kernel (in the /boot directory) will be hidden and that branch replaced.

If you are not sure, post the output of mount and the contents of your /etc/fstab file.

Last edited by ewaller (2014-08-15 06:15:09)

kramlegan · 2014-08-15 06:41:15

Thank you for your reply.

/boot was not mounted.

I cannot easily post the output of mount and /etc/fstab since networking is now not working on this box and it is quite a bit of information to type out. Ugh.

in fstab (summarized) I have
/
/home
swap

and mount has no boot or /boot entry ($mount |grep boot)

So how do I fix this issue? Will copying what I have in "unmounted" /boot to partition /boot simply fix this?

(I am assuming not running the updated kernel is why networking and Xorg is not working now correct?)

ewaller · 2014-08-15 13:15:17

The easiest way is to mount the boot partition and then re-install linux using sudo pacman -S linux
It should install from the cache -- you should not need a network connection.

kramlegan · 2014-08-15 14:06:30

I am unable to mount the boot partition now.

I get the error
mount: unknown filesystem type 'vfat'

It looks like it has to do with running the incorrect kernel.
https://bbs.archlinux.org/viewtopic.php?id=28437

the key is that the kernel is updated ( e.g. from 2.23 -> 2.24 ). 
the  vfat kernel module reside in difference directory (/lib/modules/XXXx-2.24/)after update.
but the kernel version in /proc  is the old one ,  until you reboot.

if you don't reboot, when load the vfat module, the insmod will search the  /lib/modules/`uname -r` , which can found nothing to load.  well,  what you get is nothing but some string like
# modprobe vfat

Any other suggestions on how to fix this?

Strike0 · 2014-08-15 14:25:12

If still booted, you can downgrade to the previous kernel

# pacman -U /var/cache/pacman/pkg/linux...

and mount /boot then before upgrading again.

kramlegan · 2014-08-15 14:40:58

This worked!

After downgrating
mounting /boot
upgrading again

Thank you everyone! I am back up and running.

ewaller · 2014-08-15 14:41:49

Strike0's suggest might well work. It will restore the correct modules for the kernel that is running.

A more direct solution would be to use a chroot enviorment.

Strike0 · 2014-08-15 19:49:10

kramlegan: You better check before next update where your /boot entry in fstab went on holiday to. In post #3 you don't list it at least.

kramlegan · 2014-08-15 20:22:40

Thank you for the reminder. I added /boot back to fstab.....rebooted and it is there now. Should be good to go. Thanks again.

Strike0 · 2014-08-16 13:30:42

You're welcome. While this is a fresh thread, let me add: I don't know why you removed the /boot mount in the first place, but if you prefer it like that there are a number of ways. For example you could specify a bash alias which takes care of mounting, updating and unmounting. Or: mount /boot just read-only. This way updates including your bootloader/kernel/mkinitcpio will fail initially, but you see it error out and can remount "rw" to repeat.

kramlegan · 2014-08-16 14:47:32

To be honest I did not add it to fstab when I did the install....I questioned if it needed to be there and forgot to research/go back and add it. Looks like I answered my own question.

rebootl · 2014-08-16 14:55:23

Also, in case you didn't do it yet, you may want to remove remaining files on the _unmounted_ /boot directory, to avoid future confusion.

Regards

Last edited by rebootl (2014-08-16 14:55:51)

Arch Linux

#1 2014-08-15 05:54:30

[SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#2 2014-08-15 06:14:50

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#3 2014-08-15 06:41:15

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#4 2014-08-15 13:15:17

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#5 2014-08-15 14:06:30

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#6 2014-08-15 14:25:12

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#7 2014-08-15 14:40:58

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#8 2014-08-15 14:41:49

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#9 2014-08-15 19:49:10

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#10 2014-08-15 20:22:40

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#11 2014-08-16 13:30:42

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#12 2014-08-16 14:47:32

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

#13 2014-08-16 14:55:23

Re: [SOLVED] upgraded linux 3.15.8-1 to 3.16.1-1 but uname showing 3.15

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