Retropie or retro gaming on a Fujitsu Futro S550-2 or anything else with a ATI Radeon Xpress X1250 on Linux

I did not find anything about this topic. You will however find a lot of CPU benchmarks and that Freifunk uses this as a crypto offloader device but nothing about the integrated graphics. According to various tests and benchmarks, the Radeon Xpress X1250 should be able to pull off ~200 fps at Quake 3 in 1024x768. That might have been the case with the Windows driver. However on Linux the only driver supporting this card nowadays is the open source radeon driver.

I tried running glxgears on Ubuntu which gave a solid 35 fps. That is pretty bad. glxinfo revealed that hardware acceleration is active and it's not software rendering. Also updating the driver to the latest one didn't help. I still gave Retropie a try. Solid 30% CPU when running an arcade game on MAME but it feels like 5 fps or something. Even a Raspberry Pi 1 is better than this.

So in short, don't waste your time trying to run OpenGL applications on Linux. Even hardware accelerated desktop might be too much.