Hardware AMD R9 380
Fedora 28 fresh install
kernel panic on kernel-4.17.2-200.fc28.x86_64
[   79.036493] WARNING: CPU: 0 PID: 1076 at
drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132
generic_reg_update_ex+0x12c/0x160 [amdgpu]
[   79.036497] Modules linked in: fuse w83627ehf hwmon_vid snd_hda_codec_hdmi
snd_hda_intel snd_hda_codec snd_hda_core joydev coretemp snd_hwdep snd_seq
snd_seq_device snd_pcm iTCO_wdt gpio_ich iTCO_vendor_support snd_timer snd
soundcore lpc_ich asus_atk0110 shpchp amdkfd amd_iommu_v2 amdgpu chash
gpu_sched i2c_algo_bit drm_kms_helper ttm drm serio_raw 8021q ata_generic garp
mrp stp llc pata_acpi atl1c dm_multipath sunrpc

Booted on kernel-4.18.9-200.fc28.x86_64
but HDMI sound 'unconnected'