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FS#68308 - Linux 5.9.1 doest not boot

Attached to Project: Arch Linux
Opened by Jamp (jamp) - Saturday, 17 October 2020, 21:23 GMT
Task Type Bug Report
Category Kernel
Status Assigned
Assigned To freswa (frederik)
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 1
Private No



My Asus I7 4700HQ notebook does not boot after upgrade from kernel v.5.8.14 to 5.9.1

The grub menu appears but then the fan start to speed up and nothing happens.
On the screen there is the "Loading Linux linux" message and the system remains stuck there
Switching console does not work so I think that it isn't a graphics interface problem. Trying to downgrade...

Additional info:
* package version(s)
* config and/or log files etc.
* link to upstream bug report, if any

Steps to reproduce:

upgrade to 5.9.1
This task depends upon

Comment by loqs (loqs) - Sunday, 18 October 2020, 01:41 GMT
Are the nvidia modules included in the initrd?
Comment by AK (Andreaskem) - Sunday, 18 October 2020, 08:58 GMT Comment by Jamp (jamp) - Sunday, 18 October 2020, 09:19 GMT
Apparently they aren't. I looked at /etc/mkinitcpio.conf and there is nothing related.
In the past I had problems with the Nvidia drivers but it never happened that the machine was completely inaccessible. I has been always able to login in text mode. Now the machine is apparently loaded (fan spins loud) but frozen.
I tried to downgrade by booting the usb flash, then chrooting to the mounted root partition and downgrading to the previous kernel (and everything related) version with pacman -U. Surprisingly the outcome with the downgraded kernel was the same. So maybe the problem is in something used to build the kernel. I was able to boot the machine by copying the kernel and the initramfs* files from the /boot of a virtual machine I had on another PC. Surprisingly again, for me, this is working fine.
Comment by Jamp (jamp) - Tuesday, 20 October 2020, 05:56 GMT
Thanks @AK, interesting link. So we must wait a month before upgrading the kernel.
At this point I'm somewhat surprised being apparently only one of the few that is complaining about this problem
and by the lack of any warning on arch's home page.
Comment by loqs (loqs) - Tuesday, 20 October 2020, 06:30 GMT
@jamp have a look at FS#68312 the symptoms do not match what you are reporting. If you blacklist the nvidia modules (nvidia nvidia-drm nvidia-modeset nvidia-uvm) or remove the package supplying those modules can you then boot a 5.9 kernel?
Comment by Jamp (jamp) - Tuesday, 20 October 2020, 07:50 GMT
@loqs I blacklisted the modules and upgraded again the kernel (blacklisting tested on the working system, before upgrading to 5.9.1) and the symptoms are as reported before so it is not a problem due to NVidia modules.
Booting 5.9.1 does not leave apparently any notice in the logs.
My system is an Asus N750JV.

Thank you