Can't log in after kernel update

After updating kernel the log in screen doesn’t appear and PC is stuck at this (photo). I can access terminal. Please help

you never just update the kernel
you run a full system update - you should

do run the full system update again from there:
sudo pacman-mirrors -f
(or any other variant of updating the list of mirrors)
sudo pacman -Syu
to run the update

inxi -zv8
at least
in case you still need help - system info is needed in that case

run the update
Everything is up to date
There is nothing to do

How to move list up and down? The system info list is long

Ref: [HowTo] Use public command-line pastebin services without installing anything!

inxi -Farz | curl -F 'file=@-' https://0x0.st
mhwd-kernel -li | curl -F 'file=@-' https://0x0.st
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inxi -Fz8 | curl -F 'file=@-' https://0x0.st
post the link that comes

visiting that link, we will be able to see what you saw - all of it

https://0x0.st/8TS0.txt

Appears there was a mixup.

I asked for -Farz and Nachlese (originally) asked for -zv8

A typo in the previous message asked for -Fz8 which would not be valid.

Please try again using either

inxi -Farz | curl -F 'file=@-' https://0x0.st

Or

inxi -zv8 | curl -F 'file=@-' https://0x0.st

As well as

mhwd-kernel -li | curl -F 'file=@-' https://0x0.st

meine Güte - typo/falsches Kommando:
OMG - typo / wrong command:
inxi -zv8

https://0x0.st/8ay6.txt

What do you mean by:
can’t log in
?

You could run the command - so: you where logged in - no?

Normally I have the UI screen with log in, but for some reason the pc is stuck in the line at the photo. I can access terminal with ctrl+alt+F4

It appears that for some reason you have an RT kernel installed.

Is this intentional?

The realtime kernels are really only for situations like audio engineers.

Your nvidia drivers appear missing or unloaded… do you have the linux613-rt-nvidia package(s) installed? And/or have you done something other than using mhwd to install the drivers?

I would suggest to use regular kernels, and stick to LTS, unless you have some other reason.
(Thats 6.6 and 6.12 … probably getting rid of 613-rt)

sudo mhwd-kernel -i linux612

In whatever case you should then (re)install your drivers;

sudo mhwd -f -i pci video-nvidia
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so: the display manager doesn’t start - but the system is up and you can log in

see what @cscs said - why the -rt kernel?

boot another one - if you have another one
you definitely should have at least one alternate

Run the commands successfully.
Reboot
Still the same

How do I do that?

At grub menu select Advanced and then a different kernel.
Once booted into a different kernel you can run

sudo mhwd-kernel -r linux613-rt

What’s a grub menu?

Its the first thing that appears during the boot process.
It would look something like this:

If you dont see that for some reason then try holding Shift or tapping Esc during startup.

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if you don’t see it by default - hit ESC and you will

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Alright, done,
reboot now?