ATI FirePro 2260 doesn't work after the update 'drm-next-2018-12-14'

[Christian Zigotzky]

Hello,

An end user reportet that his ATI FirePro 2260 doesn't work anymore with 
the latest Git kernel. We are a first level Linux support and we usually 
compile Git kernels during the merge window time for testing. After the 
update 'drm-next-2018-12-14', his ATI FirePro 2260 doesn't work anymore. 
We removed the update 'drm-next-2018-12-14' and after that he reported 
that his ATI FirePro 2260 works again. Unfortunately we can't test 
because we don't have an ATI FirePro 2260. Please check the update. 
Currently we release test kernels without your latest updates for our 
end users.

Further information in the support thread: 
http://forum.hyperion-entertainment.com/viewtopic.php?f=58&t=4181&start=30#p46644

Cheers,
Christian