Desperately waiting for RX 550 2GB support

This is a Linux issue but must have an unofficial driver for it

Interesting thing is that my 4GB RX 550 works but my 2GB RX 550 don't

I have two rigs (each of them have 6 RX 550 2GB) work unfortunately with Windows...
My only 4GB RX 550 works with 6 other 8GB RX 580 on the same rig.