Re: lib32-vulkan-radeon is corrupt
Reply #1 –
https://wiki.artixlinux.org/Main/Troubleshooting#Invalid_or_corrupted_packages_.28PGP_signature.29
I also had the same issue, which persisted after reinstalling the keyrings and clearing the package cache. Steam was crashing when I forced the install with pacman -U or installed the multilib version. But, I did manage to get steam running when I changed the order of the mirrorlist, deleted and updated the sync database and installed the gremlins version of vulkan-radeon and lib32-vulkan-radeon.
sudo rm -rf /var/lib/pacman/sync
sudo pacman -Syuu
As for not being able to remove lib32-vulkan-radeon, I would uninstall steam with pacman -Rnsu and reinstall it.