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chandujr 7 Aug, 2023 @ 12:18pm
[SOLVED] Space Engine on AMD Graphics - Low Performance?
I have an Asus Strix G15 AMD Advantage Edition laptop with R9 5980HX processor and RX6800M graphics card with 12GB of VRAM running Nobara Linux. I tried the game using Proton-GE and Proton Experimental. I can only play in "Low" settings in in-game Graphics options. When I switch to "Medium", it lags a lot. What could be the problem? I've also enabled MangoHud using GOverlay and it is globally enabled. But interestingly the HUD is not showing when I run the game. I'm guessing that the game isn't running on the discrete graphics.

People at r/spaceengine sent me here. They also mentioned that this is not a DirectX game but an OpenGL one. Have any of you faced similar problems?

Update: Fractional scaling in Display settings was the culprit. I changed it to 100% and now I can play the game in Ultra settings smoothly.
Last edited by chandujr; 8 Aug, 2023 @ 8:05am
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Marlock 7 Aug, 2023 @ 1:06pm 
if that cpu has builtin graphics it might indeed be used by default instead of the dedicated gpu chip

ArchWiki is a great resource even for other distros:
https://wiki.archlinux.org/title/PRIME#For_open_source_drivers_-_PRIME

try playing after adding this into steam > library > the game > properties > launch parameters:
DRI_PRIME=1 %command%
#1
chandujr 8 Aug, 2023 @ 8:04am 
I was able to fix this by changing the fractional scaling to 100% in my Display settings. Now I'm able to play in Ultra settings.
#2
Marlock 8 Aug, 2023 @ 8:10pm 
Originally posted by chandujr:
I was able to fix this by changing the fractional scaling to 100% in my Display settings. Now I'm able to play in Ultra settings.
makes sense...
direct multiple scaling (100% 200% 300%) is computationally cheap (double each pixel)

fractional scaling (125% 150% etc) is computationally expensive (interpolation, edge detection, whatnot)
#3
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Steam for Linux > AMD Graphics Cards > Topic Details
Date Posted: 7 Aug, 2023 @ 12:18pm
Posts: 3

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