ok lets try reinstall kernels and graphics:
uninstall graphics:
sudo mhwd -r pci video-linux
sudo mhwd -r pci video-modesetting
sudo mhwd -r pci video-vesa
reinstall kernel:
sudo mhwd-kernel -i linux515
install graphics:
sudo mhwd -i pci video-linux
sudo mhwd -i pci video-modesetting
sudo mhwd -i pci video-vesa
run these commands:
sudo update-grub
sudo mkinitcpio -P
systemctl reboot
if you still get stuck at the black screen after reboot, run this:
sudo systemctl restart gdm
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