If you have installed with “nomodeset”, perhaps you do not have the AMD graphics drivers installed.
I look after a couple of iMacs with similar embedded graphics chipsets. They use the “amdgpu” driver.
Code:
rayh@yoga3:~> bla01 inxi -G
12Graphics: 12Device-1 AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] 12driver amdgpu 12v kernel
12Device-2 Apple 12type USB 12driver uvcvideo
12Display 12server X.org 1.20.3 12driver amdgpu,ati 12unloaded fbdev,modesetting,vesa 12tty N/A
12Message Advanced graphics data unavailable in consn AMdole. Try -G --display
rayh@yoga3:~>
rayh@yoga3:~> bla01 sudo /usr/sbin/hwinfo --gfxcard
18: PCI 100.0: 0300 VGA compatible controller (VGA)
[Created at pci.386]
Unique ID: VCu0.Zl1HExY7WWD
Parent ID: vSkL.+UHC75sgwM8
SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
SysFS BusID: 0000:01:00.0
Hardware Class: graphics card
Model: "Apple Radeon Pro 570"
Vendor: pci 0x1002 "ATI Technologies Inc"
Device: pci 0x67df "Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]"
SubVendor: pci 0x106b "Apple Inc."
SubDevice: pci 0x0163 "Radeon Pro 570"
Revision: 0xc5
Driver: "amdgpu"
Driver Modules: "amdgpu"
Memory Range: 0xc0000000-0xcfffffff (ro,non-prefetchable)
Memory Range: 0xd0000000-0xd01fffff (ro,non-prefetchable)
I/O Ports: 0x3000-0x3fff (rw)
Memory Range: 0x92600000-0x9263ffff (rw,non-prefetchable)
Memory Range: 0x92640000-0x9265ffff (ro,non-prefetchable,disabled)
IRQ: 40 (1202429 events)
Module Alias: "pci:v00001002d000067DFsv0000106Bsd00000163bc03sc00i00"
Driver Info #0:
Driver Status: amdgpu is active
Driver Activation Cmd: "modprobe amdgpu"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #13 (PCI bridge)
Primary display adapter: #18
rayh@yoga3:~>
(“bla01” is just a ssk connection yo a remote iMac)
Here is a list of the relevant packages installed -- you can either use this zypper command or the YaST Software Manager to check and install them I do not know if this is optimal for you, it is just whart is installed on a working Leap-15.2 system with an AMD RX570 chipset
Code:
# zypper in libvulkan1 libvulkan_radeon libdrm_amdgpu1 libdrm_radeon1 libvdpau_radeonsi xf86-video-amdgpu
#
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