Add this on terminal and should be fine : export HSA_ENABLE_SDMA=0
Tried it. It didn't work. From what I have seen, this helps to initialize more than 4 gpus.
Can you use it like this? HSA_ENABLE_SDMA=0 ./tdxminer -a lyra2z -0 bla bla bla.... You get it, before the script to run the miner.
Woohoo! It works!
sudo HSA_ENABLE_SDMA=0 ~/Downloads/tdxminer-v0.2.2.2/tdxminer -a lyra2z -o stratum+tcp://eu.bsod.pw:2159 -u xxx -p x
All 4 are running fine. Thank you very much sayyiditow.