using rhgb causes Failed to acquire modesetting permission error

Hello,

I have recently reinstalled the rpmfusion nvidia drivers on Fedora 28. Strangely enough, now if rhgb is left as boot parameter, 9 times out of 10 logging in to gnome shell fails with Failed to acquire modesetting permission error. Removing rhgb from boot line makes the problem go away.
Any ideas what might be causing this? Before the reinstall I could use rhgb without issues.
nvidia-bug-report.log.gz (78.7 KB)