system boots really slow with 4.9.x kernel or greater (tested on 4.14 rc7)

Submitted by com..@..il.com

Assigned to Default DRI bug account

Link to original bug (#103550)

Description

Created attachment 135213
journalctl output

Booting fedora with kernel 4.8 (4.8.16-300.fc25.x86_64 specifically) works fine but with any other kernel 4.9 and greater the boot process is really slow when the gui starts to load or when logging in or out or rebooting. There are several amdgpu [powerplay] errors in journalctl. I'm adding a journalctl attachment booting with kernel-4.14.0-0.rc7.git2.1.fc28.x86_64.

Attachment 135213, "journalctl output":
journalctl-b-0-output.txt