Today I updated the system with yay. There were a lot of packages today, and it looked alright during update. But now I cannot boot. It stops with a blinking curser in left corner…I didn’t have any problems during the last year.
How is the best way to look into what happened, or can I simply downgrade again?
Right now I booted from live iso and mounted /mnt and /mnt/boot/efi and arch-chroot into /mnt
inxi -Fxxc0z | eos-sendlog
https://0x0.st/8s-L.txt
Has it been a YEAR since you updated?
If he’s got 6.10 kernel (seen in attachment) I think it’s been only around 6 months - and 6.10.10 was around 3 months ago. 
Although the real gurus will likely instruct otherwise, if I had issues after not updating for that long, first I’d be inclined to ensure my mirrors were up to date and try again.
But if that failed, I’d likely resort to doing a fresh system start from scratch (from latest ISO) … assuming I had been properly backing up my personal data via Vorta/Borg or some such. But I appreciate that there may be a simple solution that escapes my grasp.
6.10nis longer then 3 month I installed iso of a year updated fine for me
Had no other usb lol… after update blackscreen? No ctrl-alt-f3 for tty3?
No no, the system has been updated 3-4 times a week. But no problems for a year…so totally up to date and working until last update
This is information only, but I have noticed a LOT of apple hardware with issues in the last 2-3 days. I suggest regressing and/or waiting till it’s resolved before updating.
I don’t know a thing about the apple ecosystem, just noticed commonalities.
Can you go to tty? And df -h ? Above.10procent space left?
l’m not sure howto tty?
ctrl-alt-f3 or from grub / systemd-boot type e , add 3 in bootloader kernel line and boot with it
Df -h in tty gives
/dev/sda4 224G 150G (used) 63G 71% (used)
Can not see anything with 10%
also tried any linux-lts kernel ? since you are in tty, no chroot needed…
is the system plasma/sddm ?
it is xfce
Have not tried other than in chroot I did pacman -Syyu
With no change
ok i would try another display manager for now …
sudo pacman -S ly
sudo systemctl enable ly -f
all in tty mode :), look if that works works ootb, if you like it stil use matrix if possoble
Shall I try reboot after those two comands?
yes
Allright that worked! Now it did boot into a very minimal login screen. And now I’m in and it works. So it was my old display manager that made the problem?
yes you stil can keep ly 
but ehmm a greeter issue you need to reconfigure the greeter mostly
option is to move back to gtk-greeter or try reinstall slick greeter… at lightdm greeters causes sometimes issue, i think rename lightdm folder in /etc makes a new config atleast…when reinstall a greeter as example gtk-greeter … wil setup gtk-greeter
Okay
ehmmm try to keep ly look if it growth on you