Ytdyklly

I'm using fedora 28 because it seems that is the only distro where that detects the rx560x correctly. Nonethe ess, I noticed that the performance when using the discrete GPU is significantly worse than using the integrated one.

My machine configuration is:
ACER nitro 5 an515-42,
8gb ram,
APU ryzen 2500u with vega 8 integraded graphics card,
RX 560X AMD discrete graphics card.

This is the output of the lspci command

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15d0

00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Device 15d1

00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h 

(Models 00h-0fh) PCIe Dummy Host Bridge

00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3

00:01.6 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3

00:01.7 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3

00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h 

(Models 00h-0fh) PCIe Dummy Host Bridge

00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15db

00:08.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15dc

00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller 

(rev 61)

00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge 

(rev 51)

00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15e8

00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15e9

00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ea

00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15eb

00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ec

00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ed

00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ee

00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ef

01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] 

Baffin [Radeon RX 460/560D / Pro 450/455/460/555/555X/560/560X] (rev 

c0)

02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. 

RTL8411B PCI Express Card Reader (rev 01)

02:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. 

RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 12)

03:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless 

Network Adapter (rev 32)

04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. 

[AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] 

(rev c4)

04:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 

15de

04:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] 

Device 15df

04:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15e0

04:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15e1

04:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Device 15e3

05:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA 

Controller [AHCI mode] (rev 61)

As can be seen by the xrandr --listdevices command, both cards are recognized

Providers: number : 2

Provider 0: id: 0x7a cap: 0xf, Source Output, Sink Output, Source 

Offload, Sink Offload crtcs: 4 outputs: 2 associated providers: 1 

name:modesetting

Provider 1: id: 0x44 cap: 0x5, Source Output, Source Offload crtcs: 5 

outputs: 0 associated providers: 1 name:modesetting

But when running applications using the discrete GPU the performance is slower. One example is running

DRI_PRIME=0 glmark2

That one uses the integraded GPU and I obtained a performance of around 2000 fps, but running:

DRI_PRIME=1 glmark2

Gives me a performance of around 500 fps, that should not be the case becase it is the discrete GPU.

This can be confirmed by the following outputs:

$ DRI_PRIME=0 glxinfo | grep "OpenGL renderer"

OpenGL renderer string: AMD RAVEN (DRM 3.26.0 / 4.18.7- 

200.fc28.x86_64, LLVM 6.0.1)

$ DRI_PRIME=1 glxinfo | grep "OpenGL renderer"

OpenGL renderer string: AMD Radeon (TM) RX Graphics (POLARIS11 / DRM 

3.26.0 / 4.18.7-200.fc28.x86_64, LLVM 6.0.1)

I also attach the ouput of the command dmesg | grep amdgpu

[    2.967193] [drm] amdgpu kernel modesetting enabled.

[    2.983335] amdgpu 0000:01:00.0: enabling device (0002 -> 0003)

[    3.049189] amdgpu 0000:01:00.0: VRAM: 4096M 0x000000F400000000 - 

0x000000F4FFFFFFFF (4096M used)

[    3.049190] amdgpu 0000:01:00.0: GTT: 256M 0x0000000000000000 - 

 0x000000000FFFFFFF

 [    3.049332] [drm] amdgpu: 4096M of VRAM memory ready

 [    3.049333] [drm] amdgpu: 4096M of GTT memory ready.

 [    3.140025] [drm:dc_create [amdgpu]] *ERROR* DC: Number of 

 connectors is zero!

 [    3.277785] [drm] Initialized amdgpu 3.26.0 20150101 for 

 0000:01:00.0 on minor 0

 [    3.278060] fb: switching to amdgpudrmfb from EFI VGA

 [    3.278487] amdgpu 0000:04:00.0: VRAM: 1024M 0x000000F400000000 - 

 0x000000F43FFFFFFF (1024M used)

 [    3.278489] amdgpu 0000:04:00.0: GTT: 1024M 0x000000F500000000 - 

 0x000000F53FFFFFFF

 [    3.278533] [drm] amdgpu: 1024M of VRAM memory ready

 [    3.278534] [drm] amdgpu: 3072M of GTT memory ready.

 [    3.468197] amdgpu: [powerplay] dpm has been enabled

 [    3.468480] [drm:construct [amdgpu]] *ERROR* construct: Invalid 

 Connector ObjectID from Adapter Service for connector index:2! type 0 

 expected 3

 [    3.468545] [drm:construct [amdgpu]] *ERROR* construct: Invalid 

 Connector ObjectID from Adapter Service for connector index:3! type 0 

 expected 3

 [    3.525127] fbcon: amdgpudrmfb (fb0) is primary device

 [    3.566614] amdgpu 0000:04:00.0: fb0: amdgpudrmfb frame buffer 

 device

 [    3.572124] amdgpu 0000:04:00.0: ring 0(gfx) uses VM inv eng 4 on 

 hub 0

 [    3.572125] amdgpu 0000:04:00.0: ring 1(comp_1.0.0) uses VM inv 

 eng 5 on hub 0

 [    3.572127] amdgpu 0000:04:00.0: ring 2(comp_1.1.0) uses VM inv 

 eng 6 on hub 0

 [    3.572128] amdgpu 0000:04:00.0: ring 3(comp_1.2.0) uses VM inv 

 eng 7 on hub 0

 [    3.572129] amdgpu 0000:04:00.0: ring 4(comp_1.3.0) uses VM inv 

 eng 8 on hub 0

 [    3.572131] amdgpu 0000:04:00.0: ring 5(comp_1.0.1) uses VM inv 

 eng 9 on hub 0

 [    3.572132] amdgpu 0000:04:00.0: ring 6(comp_1.1.1) uses VM inv 

 eng 10 on hub 0

 [    3.572133] amdgpu 0000:04:00.0: ring 7(comp_1.2.1) uses VM inv 

 eng 11 on hub 0

 [    3.572134] amdgpu 0000:04:00.0: ring 8(comp_1.3.1) uses VM inv 

 eng 12 on hub 0

 [    3.572136] amdgpu 0000:04:00.0: ring 9(kiq_2.1.0) uses VM inv eng 

 13 on hub 0

 [    3.572137] amdgpu 0000:04:00.0: ring 10(sdma0) uses VM inv eng 4 

 on hub 1

 [    3.572138] amdgpu 0000:04:00.0: ring 11(vcn_dec) uses VM inv eng 5 on hub 1

 [    3.572140] amdgpu 0000:04:00.0: ring 12(vcn_enc0) uses VM inv eng 6 on 

hub 1

 [    3.572141] amdgpu 0000:04:00.0: ring 13(vcn_enc1) uses VM inv eng 7 on 

hub 1

[    3.579107] [drm] Initialized amdgpu 3.26.0 20150101 for 0000:04:00.0 

on minor 1

[    5.202665] audit: type=1130 audit(1537458205.475:67): pid=1 uid=0 

auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 

msg='unit=systemd-backlight@backlight:amdgpu_bl1 comm="systemd" 

exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'

[   15.013231] amdgpu 0000:01:00.0: GPU pci config reset

[   19.678936] amdgpu: [powerplay] dpm has been enabled

[   26.341565] amdgpu 0000:01:00.0: GPU pci config reset

[   59.533544] amdgpu: [powerplay] dpm has been enabled

[   65.786402] amdgpu 0000:01:00.0: GPU pci config reset

[  167.130594] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 

1us * 10 tries - optc1_lock line:628

[  167.130677] WARNING: CPU: 3 PID: 1899 at 

drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 

generic_reg_wait+0xe7/0x160 [amdgpu]

[  167.130704]  snd_hda_codec irqbypass videobuf2_memops crct10dif_pclmul 

btusb videobuf2_v4l2 snd_hda_core btrtl crc32_pclmul btbcm 

videobuf2_common btintel ath snd_hwdep bluetooth snd_seq videodev 

ghash_clmulni_intel snd_seq_device cfg80211 joydev snd_pcm media 

ecdh_generic sp5100_tco snd_timer k10temp i2c_piix4 rtsx_pci_ms rfkill 

snd 

memstick soundcore wmi video pinctrl_amd acer_wireless pcc_cpufreq 

acpi_cpufreq amdkfd amd_iommu_v2 amdgpu chash i2c_algo_bit gpu_sched 

drm_kms_helper rtsx_pci_sdmmc mmc_core ttm crc32c_intel serio_raw drm 

r8169 rtsx_pci mii i2c_hid

[  167.130774] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]

[  167.130850]  optc1_lock+0xa0/0xb0 [amdgpu]

[  167.130897]  dcn10_pipe_control_lock.part.28+0x4a/0x70 [amdgpu]

[  167.130944]  dcn10_apply_ctx_for_surface+0xee/0x1210 [amdgpu]

[  167.130994]  ? hubbub1_verify_allow_pstate_change_high+0xdd/0x180 

[amdgpu]

[  167.131040]  ? dcn10_verify_allow_pstate_change_high+0x1d/0x240 

[amdgpu]

[  167.131085]  ? dcn10_set_bandwidth+0x275/0x2d0 [amdgpu]

[  167.131129]  dc_commit_state+0x269/0x580 [amdgpu]

[  167.131171]  ? set_freesync_on_streams.part.6+0x4d/0x250 [amdgpu]

[  167.131213]  ? mod_freesync_set_user_enable+0x11f/0x150 [amdgpu]

[  167.131260]  amdgpu_dm_atomic_commit_tail+0x37c/0xd70 [amdgpu]

[  167.131298]  ? amdgpu_bo_pin_restricted+0xd6/0x300 [amdgpu]

[  167.131441]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]

[  167.493997] [drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* 

hwss_edp_wait_for_hpd_ready: wait timed out!

[  992.949753] amdgpu: [powerplay] dpm has been enabled

[  999.815690] amdgpu 0000:01:00.0: GPU pci config reset

[ 1097.603835] amdgpu: [powerplay] dpm has been enabled

[ 1105.675220] amdgpu 0000:01:00.0: GPU pci config reset

[ 1138.629401] amdgpu: [powerplay] dpm has been enabled

[ 1157.490886] amdgpu 0000:01:00.0: GPU pci config reset

[ 1167.629670] amdgpu: [powerplay] dpm has been enabled

[ 1188.641935] amdgpu 0000:01:00.0: GPU pci config reset

[ 1237.003085] amdgpu: [powerplay] dpm has been enabled

[ 1243.811986] amdgpu 0000:01:00.0: GPU pci config reset

[ 1287.684082] amdgpu: [powerplay] dpm has been enabled

[ 1332.291087] amdgpu 0000:01:00.0: GPU pci config reset

[ 1511.066683] amdgpu: [powerplay] dpm has been enabled

[ 1520.167710] amdgpu 0000:01:00.0: GPU pci config reset

[ 1605.023196] amdgpu: [powerplay] dpm has been enabled

[ 1611.134239] amdgpu 0000:01:00.0: GPU pci config reset

[ 1930.739920] amdgpu: [powerplay] dpm has been enabled

[ 2105.711880] amdgpu 0000:01:00.0: GPU pci config reset

[ 2440.536121] amdgpu: [powerplay] dpm has been enabled

[ 2447.470108] amdgpu 0000:01:00.0: GPU pci config reset

[ 2453.329765] amdgpu: [powerplay] dpm has been enabled

[ 2489.324912] amdgpu 0000:01:00.0: GPU pci config reset

[ 3732.604342] amdgpu: [powerplay] dpm has been enabled

[ 3744.199117] amdgpu 0000:01:00.0: GPU pci config reset

[ 3747.717927] amdgpu: [powerplay] dpm has been enabled

[ 3900.960469] amdgpu 0000:01:00.0: GPU pci config reset

[ 4876.333471] amdgpu: [powerplay] dpm has been enabled

[ 4883.356467] amdgpu 0000:01:00.0: GPU pci config reset

[ 5597.531838] amdgpu: [powerplay] dpm has been enabled

[ 5604.423794] amdgpu 0000:01:00.0: GPU pci config reset

[ 5606.860546] amdgpu: [powerplay] dpm has been enabled

[ 5613.824859] amdgpu 0000:01:00.0: GPU pci config reset

[ 5619.323471] amdgpu: [powerplay] dpm has been enabled

[ 5625.588060] amdgpu 0000:01:00.0: GPU pci config reset

Any help regarding this will be highly appreciated!

I regard the same issue as you on the Arch Linux (mesa-git, llvm-svn, linux 4.18.12 (even running 4.19.x or mainline 4.20rcx)). Stable linux kernel isn't, I would say, optimized for our gpu yet. Luckily, there is a temporary solution. I tried linux-amd-wip-git (drm-next-4.21-wip) which has the latest amd patches (there are also other kernels which have them like linux-drm-fixes-git (drm-fixes), depends on you which you pick). Many games are unplayable on the stable kernel and most of them run better on the integrated gpu than on the discrete one as you are also saying. linux-amd-wip-git makes perform discrete gpu better than integrated one and I also get e.g. ~30 fps gain on the World Of Warcraft via wine and gallium nine/dxvk. Some games perform even better, every I tried do. We just have to wait for merge of these patches to the stable linux. At the end, at least we know it will be fixed.

I tried Linux 4.21 patches that were sent to mainline kernel repo and even linux-amd-wip-git and my VEGA 8 still does better then RX560X for me sadly. Same laptop as you have and Terraria runs much much better on VEGA 8 then RX560X on 4.21 and linux-amd-wip-git too. RX560X should run Skyrim at max on 60fps but yet even on linux-amd-wip-git i cannot play on Ultra and i have to run it on high and still cant reach 60fps.

glxgears reports around 7000 fps for VEGA8 and 3500 for RX560X.