The only thing I can advise is pick up from the archive of Arch the 4.19 kernel, choose the last edition, or build one from AUR
aur/linux-lts419 4.19.176-1 (12) (0.40)
The LTS 4.19 Linux kernel and modules
aur/linux-lts419-headers 4.19.176-1 (12) (0.40)
Headers and scripts for building modules for the LTS 4.19 Linux kernel
aur/linux-lts419-docs 4.19.176-1 (12) (0.40)
Documentation for the LTS 4.19 Linux kernel
There are many lts kernels to choose but you should try the ones that are still actively updated
There must be some piece of hw in there, maybe gfx related that is no longer supported. Arch generally doesn't disable things from kernel.org, only modify it to make it work with arch.