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Bug #13480

Massive FPS drop on Dune

Added by Jajcus over 7 years ago. Updated over 7 years ago.

Status:
Confirmed
Severity:
Normal
Assignee:
-
Category:
Camera
Target version:
-
Start date:
12/22/2016
% Done:

10%

Version:
1.2.2
Platform:
Linux
Expansion:
Language:
English (US)
Mod Related:
No
Votes:
Arrow u r green
Arrow d r red

Description

I was playing my career game, sent a big station to Duna orbit, then tried to land a first outpost on the surface. That was hardly possible as the FPS dropped to unplayable levels as soon I was low enough over the planet. I couldn't play unless I pointed camera into the sky.

I have integrated graphics, so I do not expect great performance, but the game was totally playable until this point. I get 56 FPS in the Space Center, 15 FPS near the huge space station orbiting duna… and 5FPS on Duna surface.

I reproduced the problem on vanilla KSP (only HyperEdit to put craft on Duna, mod removed then). Craft on the launchpad: 56 FPS, craft on Duna: 5FPS.
-force-glcore, -force-glcore33 launch options do not help. Graphics preferences are already set to minimum (I played with something better before the problem hit me).

save.zip (12.1 KB) save.zip game save Jajcus, 12/22/2016 07:06 PM
KSP.log (240 KB) KSP.log log file Jajcus, 12/22/2016 07:06 PM
Player.log (569 KB) Player.log log file Jajcus, 12/22/2016 07:06 PM

History

#1 Updated by Jajcus over 7 years ago

Forgot to include my specs:

CPU: Intel(R) Core(TM) i5-6267U
GPU: Intel(R) Iris Graphics 550

PLD Linux
kernel 4.8.6
OpenGL driver: Mesa 13.0.2

#2 Updated by Jajcus over 7 years ago

Oh… and I run the 64-bit KSP.

#3 Updated by Jajcus over 7 years ago

I have found a workaround:

UNSUPPORTED_LEGACY_SHADER_TERRAIN = True

in settings.cfg. Looks quite bad, but FPS is back to 56 – playable, at least.

#4 Updated by cobbaut over 7 years ago

  • Status changed from New to Confirmed
  • % Done changed from 0 to 10

I have the same issue. Getting less than 5 fps on the Duna surface.
Even after removing all mods, removing settings.cfg and "rm -rf ~/.config/unity3d" the issue remains.

The simplest 7-parts craft on Duna gets less than 5 fps, even the static covering Kerbalheads stays for 15-20 seconds. Switching to map mode makes the problem disappear, switching back to the Duna surface immediately drops to less than 5fps.

I have no problem landing 30-parts crafts on Minmus.

I tried almost every solution from the KSP forums, lowering graphics settings does not help at all.

"UNSUPPORTED_LEGACY_SHADER_TERRAIN = True" works, but is awful to look at.

Steam KSP 1.2.2 on Linux Debian Sid, 8GB RAM, SSD, i7-4750HQ 2GHz, XFCE desktop with all other programs closed.

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