I have a 2080 super, and my valve index work great in VR, so not a valve issue from my perspective. I7 7700k. My game is also not the steam version, it is the stand alone version.

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Encountered Vulkan validation layer error
general
error
/home/xplane/.local/share/Steam/ubuntu12_32/steamoverlayvulkanlayer.so: wrong ELF class: ELFCLASS32
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with PB 1150b3 less FPS

this with 1150b1
X-plane 11 with Open GL run in VR 35 – 40fps , without VR run 55 – 65fps
X-plane 11 with Vulkan without VR 70 – 90fps ( fantastic ), very smooth
x-plane 11 with Vulkan in Vr 50 – 65fps

this with 1150b3
X-plane 11 with Open GL run in VR 35 – 40fps , without VR run 55 – 65fps
X-plane 11 with Vulkan without VR 50 – 70fps ( less 20-25fps)
x-plane 11 with Vulkan in Vr 30 – 35fps ( less 20-25fps)

is 1150b3 a new test ?

My Specs: i7 4790K , RTX2070 , 32GB RAM, MSI Gaming5

Just tried the 10.50b1 via Steam, switched to Vulkan and I am getting 1fps on full detail and 20fps on max detail in VR with Vive 1. In the menu it seems to be locked to 45fps.

This is a Quaddro P6000 GPU.

What to do?

Something is _weird_ on your setup. Users with lesser systems are getting better results. When we get to perf, we have good tools to capture what’s going on.

One other thing I am sitting at Tampa airport ramp in the LR Barron with terminal buildings in front of me

now I have my reverb on with Vulcan enabled I release the parking brake and begin to turn the plane out to the taxi way. As I am turning the buildings go by just as they did in the open gl version stuttering as you make your 360 to hit taxi way.

Something is very wrong with this. I see LR will be looking into this performance problem some are having. I just wonder if all the happy posts are from AMD people.

How many 1080 ti users are having the same problems I am having
We need to start an x plane 1080 ti users forums

I am in the same boat.

i7 7700k water cooled 5ghz
16GB 3866 speed ram
1080 ti
Win 10-64bit
HP Reverb

I have spent $160.00 after 11.50 came out. Dumped my steam copy and purchased new copy from LR website.

Formatted one of my SSD and installed brand new copy of X Plane 11.50

Then I thought my cpu is at 5Ghz maybe I need faster ram. So I dropped 115.00 at newegg and went from 2400 speed to 3866 speed.

I do see a drop in cpu time it used to be 20ms per frame with new ram now down to 15ms and my CPU runs a few degrees hotter. This is not a bad thing because the ram is talking much quicker to the cpu. This is going to be great!!!!!

Now I am ready to go…. Ya Right fired up x plane and I get the exact same performance I did in the non vulkan x plane. 17 fps

not one frame extra when Vulkan is enabled. If I move AA 2 notches to the left I get around 32fps with vulkan enabled.

I mean come on I know it is NOT my system it has plenty of muscle the only addon I am using is orbx true earth Florida Nothing else.

Again I see NO performance gain AT ALL with Vulcan enabled.

Win7 support is not endet. You can still get updates until 2023.
And I doubt that XP11 will run on 7 in the future since LR isn’t able to test it and solve problems.
The worldwide market share of 7 is constant since a half year (about 25%).

Hi guys,
problem solved.
everything works fine and smooth.
with Vulkan in VR run 50 – 65 fps in high settings , absolutly fantastic ( ortho files and orbx ).
With Vulkan without VR 75 – 105 fps, brilliant , constantly and smooth.
thank so much for this Update.