Trouble with amdgpu driver

Rig: Xeon E3-1230 (no graphic), AMD RX 480. Kernel: 4.4.140-62-default.
I was running the amdgpu-pro driver successfully for more than year, but since the last few weeks, i think since the 4.4.13x kernels, the amdgpu-pro kernel modul will not build any longer. I’ll ask this in another thread.

Right now there is no kernel modul running for amd.

vos@linux-urgh:~> /sbin/lspci -nnk |grep -A3 VGA
01:00.0 **VGA** compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/580] [1002:67df] (rev c7)
        Subsystem: PC Partner Limited / Sapphire Technology Radeon RX 470/480 [174b:e347]
01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 580] [1002:aaf0]
        Subsystem: PC Partner Limited / Sapphire Technology Device [174b:aaf0]

Also lsmod isn’t showing anything amd related.

After modprobe amdgpu it changes to

**linux-urgh:~ #** lsmod    
Module                  Size  Used by
amdkfd                139264  1  
amd_iommu_v2           20480  1 amdkfd
amdgpu                684032  0  
ttm                   106496  1 amdgpu
drm_kms_helper        155648  1 amdgpu
drm                   397312  3 ttm,drm_kms_helper,amdgpu
fb_sys_fops            16384  1 drm_kms_helper


But the output of /sbin/lspci -nnk |grep -A3 VGA still looks like above, no kernel modul running.
After a reboot the amd moduls also disappeard again from lsmod.

How can the amd kernel driver be insert permanently?
The biggest problem is, that the resolution right now is 1024x768 and i want to go back to FullHD.

Thx for reading.