Created attachment 144926 [details]
journalctl -b0 output on kernel 5.3.0-rc2 from ubuntu mainline repository, with
a system with rx 540 gpu

kernel 5.3.0-rc1 was just fine and was just fixed a long lasted regression on
rx 540 gpu, updating to 5.3.0-rc2 causes gpu to be disabled after launching a
single application with it, gpu works fine until application is closed, then
DRI_PRIME=1 doesn't work