UI running very slow on unmatched board with R7 AMD GPU card

Hi All,

We are trying to up UI with Radeon R7 240 GPU card on unmatched board. The ubuntu running on “Ubuntu 22.04.1 LTS 5.15.0-1026-generic”. The GPU card is detected as PCI device and amdgpu driver running successfully. When we have connected display on HDMI port of GPU card, the UI running very slow.

  • Specification of Radeon R7 240 GPU card:

  • Memory Configuration 2GB DDR3

  • Stream Processors 320

  • Engine Clock Up to 780 MHz

  • Compute Performance 499 GFLOPS

ubuntu@ubuntu:~$ sudo lshw -c video
description: VGA compatible controller
product: Oland PRO [Radeon R7 240/340 / Radeon 520]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:07:00.0
logical name: /dev/fb0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=amdgpu latency=0 mode=1920x1080
resolution=1920,1080 visual=truecolor xres=1920 yres=1080
resources: iomemory:200-1ff irq:94 memory:2000000000-200fffffff
memory:60500000-6053ffff ioport:0(size=256) memory:60540000-6055ffff

Does anyone have observed this type of similar issue with GPU card on unmatched board? Could you please guide us that how we can improve UI performance on our setup?


AMD RX550 is working fine

1 Like

Perhaps the video card and driver are working fine, and the problem is just that the board isn’t as fast as you expected. The cpu doesn’t have L2 cache prefetch, so non-dma block moves are slower than on similar processors. Also, the DDR system doesn’t have good throughput, so anything touching a lot of memory will be slow. Maybe try running a simpler GUI that places less demands on the cpu?

Hi Literming,

Do you have tested ubuntu release on unmatched board with AMD RX550?



We have tried same setup using basic graphical disk image with Xfce4 desktop environment for unmatched board, it works very smooth.
We have also connected same GPU card on x86 desktop machine with Ubuntu. And over there it works pretty well. So, GPU card’s hardware capability are pretty fine for our test case.

Is there anything that we might miss while testing with “Ubuntu 22.04.1 LTS 5.15.0-1026-generic” ubuntu image for unmatched board?