On Friday, 19 July 2019 06:28:56 BST jdm wrote:

> I have updated firmware line in kernel as this now includes a few extra
> lines so not loading all of the available firmware.

Some time ago I noticed warnings in dmesg which alerted me to the fact the 
radeon graphics was not finding all the firmware it needed/wanted.  I had used 
the gentoo radeon wiki page, but noticed the same graphics was now also 
covered in the amdgpu wike page.  Anyway, I responded to each dmesg complaint 
by adding the respective firmware in the kernel and a reboot resolved all 
problems.  In my case I was only getting a black screen trying to wake up the 
PC after a suspend in RAM, so not exactly the same problem, but similar 
enough.
-- 
Regards,

Mick

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