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Submitted by Redsandro

Assigned to Default DRI bug account

Link to original bug (#111123)

Description

I'm having issues using hardware accelerated graphics on my AMD Ryzen 5 3400G with A300M-STX mainboard and A300 chipset by ASRock.

That's the AMD Ryzen 5 3400G with Radeon Vega Graphics (family: 0x17, model: 0x18, stepping: 0x1)

When attaching an UHD (4k) monitor over the DisplayPort, everything works as expected as long as I am running an older kernel that doesn't support the APU video hardware. E.g. 4.15 or 4.18.

When I use 5.0, 5.1 or 5.2 kernel, the same display connection that worked fine before doesn't work anymore. The image keeps disappearing, shaking, distorting and creating green pixel noise, as if the cable is bad quality.

When starting those same kernels with nomodeset from GRUB, the image is stable again, but the hardware acceleration is disabled.

HDMI works fine on a HD display (1920x1080) but also no picture on UHD.

HWE Kernel 5.0.0.20.21~18.04.1 does have hardware rendering, but shows the following:

[    1.296083] kfd kfd: DID 15d8 is missing in supported_devices<br>
[    1.296084] kfd kfd: kgd2kfd_probe failed<br>
```<br>
<br>
So I used Ukuu to install 5.2.0-RC7.<br>
<br>
```<br>
$ uname -a<br>
Linux abu 5.2.0-050200rc7-generic #201906300430 SMP Sun Jun 30 04:32:31 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux<br>
<br>
$ lspci | grep -i vga<br>
04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Picasso (rev c8)<br>
<br>
$ glxinfo  | grep Extended -A11<br>
Extended renderer info (GLX_MESA_query_renderer):<br>
    Vendor: X.Org (0x1002)<br>
    Device: AMD RAVEN (DRM 3.32.0, 5.2.0-050200rc7-generic, LLVM 8.0.1) (0x15d8)<br>
    Version: 19.2.0<br>
    Accelerated: yes<br>
    Video memory: 2048MB<br>
    Unified memory: no<br>
    Preferred profile: core (0x1)<br>
    Max core profile version: 4.5<br>
    Max compat profile version: 4.5<br>
    Max GLES1 profile version: 1.1<br>
    Max GLES[23] profile version: 3.2<br>
<br>
$ dmesg | grep -i amdgpu | grep -v ring<br>
[    1.202002] [drm] amdgpu kernel modesetting enabled.<br>
[    1.202142] amdgpu 0000:04:00.0: remove_conflicting_pci_framebuffers: bar 0: 0xe0000000 -> 0xefffffff<br>
[    1.202143] amdgpu 0000:04:00.0: remove_conflicting_pci_framebuffers: bar 2: 0xf0000000 -> 0xf01fffff<br>
[    1.202144] amdgpu 0000:04:00.0: remove_conflicting_pci_framebuffers: bar 5: 0xfcc00000 -> 0xfcc7ffff<br>
[    1.202146] fb0: switching to amdgpudrmfb from EFI VGA<br>
[    1.202220] amdgpu 0000:04:00.0: vgaarb: deactivate vga console<br>
[    1.202253] amdgpu 0000:04:00.0: enabling device (0006 -> 0007)<br>
[    1.202474] amdgpu 0000:04:00.0: VRAM: 2048M 0x000000F400000000 - 0x000000F47FFFFFFF (2048M used)<br>
[    1.202475] amdgpu 0000:04:00.0: GART: 1024M 0x0000000000000000 - 0x000000003FFFFFFF<br>
[    1.202476] amdgpu 0000:04:00.0: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF<br>
[    1.202577] [drm] amdgpu: 2048M of VRAM memory ready<br>
[    1.202578] [drm] amdgpu: 3072M of GTT memory ready.<br>
[    1.509190] fbcon: amdgpudrmfb (fb0) is primary device<br>
[    1.559664] amdgpu 0000:04:00.0: fb0: amdgpudrmfb frame buffer device<br>
[    1.584215] [drm] Initialized amdgpu 3.32.0 20150101 for 0000:04:00.0 on minor 0<br>
```<br>
<br>
Tested on Linux Mint 19.1.