Comment # 5 on bug 100375 from Michel Dänzer

(In reply to Edward O'Callaghan from comment #4)
> The actual root causes is that if a page flip is in progress something races
> on that fd and causes the null ptr deref:

How did you determine that it's related to a page flip (or amdgpu in the first
place)? I don't see the connection between that and set_root.