If it helps, I'm running with the specs below (albeit at 720p med/low settings) getting a fairly stable 30fps with no major stuttering or crashes, so based on your PC info you should be good compared to mine in terms of performance:

OS: Ubuntu 18.04.4 LTS
KERNEL: 5.3.0-42-generic
CPU: Intel Core i7-4710MQ @ 2.50GHz
GPU: NVIDIA GeForce GTX 860M
GPU DRIVER: NVIDIA 440.64
RAM: 8 GB

It might also be worth joining the public beta in Steam (Black Mesa properties > Mesa > public beta), which I seem to recall joining due to various performance related issues/crashes in Early Access.

I'm currently on the Xen chapter as I've been playing this a while on and off (24hrs total playthrough but only 1hr after the full release of the game).

I tried your advice
Beta subscription did help - a bit
But after a while of playing it got stuttery again
:(

Do you have any mods installed? I generally see advice on the Black Mesa Steam forums to uninstall those.

Have you tried reinstalling the game and/or verifying the integrity of the game files?

P.S.
I have yet to play the game myself, so I don't have first-hand experience with running the game.

Last edited by s8as8a on 20 Mar 2020 at 9:51 am UTC

No , no mods whatsoever.
Tried integrity check - no issues there.

I am getting slightly better performance by playing the windows version with proton, you should give it a try.
You need to set the following launch option to get it working tough;

%command% -oldgameui

Quoting: razing32No , no mods whatsoever.
Tried integrity check - no issues there.

Maybe it's just one graphical feature you're enabling that's causing the slowdown (possibly because of using software rendering) (and it happens to not be in the beginning train part)? Have you tried turning them all on the lowest possible settings and then increasing them one by one (while you're at the part that causes stuttering for you)? I know it's annoying, but it might help you find the problem.

Last edited by s8as8a on 21 Mar 2020 at 1:50 am UTC