Comment # 29 on bug 108577 from Duncan Roe

(In reply to Roman Li from comment #25)
> Created attachment 142374 [details]
> the latest FBC fixes
> 
> Duncan, you can also try 'the latest FBC fixes' to check whether they fix
> your issue.

I applied the patchset to Linux 4.19 (stable commit
84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d). Some lines were offset as per
attachment 142384 [details].
The black screen remained.