Created attachment 129957 [details]
no more cafedead but only fbdev

Hi Alex,
just finished to made the test.
removed the mesa the issue continue be there if radeon driver is present
i use the radeon card on 8x pcie . 
but the news is i can use on 8x the fbdev video and i see there is not cafedead
on drm 

thanks to this i can send you this this log .
the issue on 8x probably is because of this (the black screen) hope can help.

if are needed some more logs please ask i will try to help how i can