DCS now supports OpenXR natively

[Qcumber]

9 minutes ago, mrsylvestre said:

Does that mean that the MT version of DCS.exe cannot work with Pico's streaming assistant?

Interesting. I've not been able to get DCS to work with SA for a while. I use VD by default but sometimes try SA for various reasons. Does ST work? I might have to give it a try. 

[VirusAM]

1 hour ago, mrsylvestre said:

Aha! Does that mean that the MT version of DCS.exe cannot work with Pico's streaming assistant? It is something that has been bugging me for some time, I think that back in May, I could run it with SA but when I tried recently, I could not make it work anymore (but then, perhaps I remember wrong and I used the single-threaded version at the time).

SteamVR is perfectly capable of using OpenXR runtime (how MT DCS needs to be run). 

I have not a Pico 4 at the moment (but i tried it in the past) so I cannot tell anything more

Edited October 10, 2023 by VirusAM

[ricktoberfest]

On 10/8/2023 at 10:58 AM, actually_fred said:

I've not tried forcing MT to OpenVR, but it definitely is possible to force it to the legacy Oculus API by sufficiently breaking your OpenXR configuration - DCS MT will always *try* to use OpenXR, but if it fails in the right way, it'll fall back to the Oculus API.

You can also force it by disabling openxr in the registry. (Or at least you could when MT first came out). I had this setup for awhile because the default openxr didn’t play well with my rift s. I think I was getting oculus and openxr fighting over asw. I stopped doing this awhile back when I realized I could enable turbo mode in the openxr menu and that disabled the openxr asw.  

[mrsylvestre]

On 10/10/2023 at 10:34 PM, VirusAM said:

SteamVR is perfectly capable of using OpenXR runtime (how MT DCS needs to be run). 

I have not a Pico 4 at the moment (but i tried it in the past) so I cannot tell anything more

 

Indeed, SteamVR can use its OpenXR runtime even when it is launched by Streaming Assistant : I just checked that the other, civilian, sim was working well in OpenXR through SA.

On a related note (somewhat out of this topic)

• For the sake of science, I reinstalled Streaming Assistant on my PC, crossing fingers for it not to break something else (thankfully it didn't). I normally use Virtual Desktop as streamer to the Pico 4.
• For some reason, Pico's Streaming Assistant and DCS (standalone) do not get along with each other anymore on my PC (it used to work back in May). DCS remains stuck on the first splash screen (the small one with the Eagle Dynamics indian logo at the bottom) until I kill SteamVR (even after waiting 20 minutes), then it continues loading and starts in 2D. This is with both versions of DCS, single- and multithreaded. Both work flawlessly in combination with Virtual Desktop.
• It seems that for some reason, when Streaming Assistant is used as streamer to the Pico 4, DCS gets into an endless loop attempting to open the VR rendering pipeline (it never gets to the Mig Hangar). Strange. Back to VD (performance tends to be better anyway)

[Qcumber]

52 minutes ago, mrsylvestre said:

Indeed, SteamVR can use its OpenXR runtime even when it is launched by Streaming Assistant : I just checked that the other, civilian, sim was working well in OpenXR through SA.

On a related note (somewhat out of this topic)

• For the sake of science, I reinstalled Streaming Assistant on my PC, crossing fingers for it not to break something else (thankfully it didn't). I normally use Virtual Desktop as streamer to the Pico 4.
• For some reason, Pico's Streaming Assistant and DCS (standalone) do not get along with each other anymore on my PC (it used to work back in May). DCS remains stuck on the first splash screen (the small one with the Eagle Dynamics indian logo at the bottom) until I kill SteamVR (even after waiting 20 minutes), then it continues loading and starts in 2D. This is with both versions of DCS, single- and multithreaded. Both work flawlessly in combination with Virtual Desktop.
• It seems that for some reason, when Streaming Assistant is used as streamer to the Pico 4, DCS gets into an endless loop attempting to open the VR rendering pipeline (it never gets to the Mig Hangar). Strange. Back to VD (performance tends to be better anyway)

I get these issues too.

[Sr.]

After a 5 month hiatus, I see it's still broken...

Cannot run ST OpenXR mode anymore, every @#&^ing time it launches SteamVr. MT VR is still ass. Spent the better part of an entire day simply waiting...

and waiting

 

and waiting

for anything, other than the Caucuses loading screen theme song. 

 

Can't imagine why I even bothered giving it another shot.

[mbucchia]

Not broken here. I run DCS ST with OpenXR for WMR on my G2 routinely. 

Edited October 15, 2023 by mbucchia

[dburne]

DCS -MT running great for me in Open XR.

[Chief_Biv]

22 hours ago, Sr. said:

After a 5 month hiatus, I see it's still broken...

Cannot run ST OpenXR mode anymore, every @#&^ing time it launches SteamVr. MT VR is still ass. Spent the better part of an entire day simply waiting...

and waiting

 

and waiting

for anything, other than the Caucuses loading screen theme song. 

 

Can't imagine why I even bothered giving it another shot.

Have you ensured that in your WMR settings you have unchecked the Launch in SteamVR check box. DCS MT should automatically load in OpenXR these days provided that this option is not set in WMR. You don’t need SteamVR if you have a G2. As others have said, DCS is not broken. There must be something else on your PC (which is a good spec). 

Edited October 16, 2023 by Chief_Biv

[Sr.]

2 hours ago, Chief_Biv said:

Have you ensured that in your WMR settings you have unchecked the Launch in SteamVR check box. DCS MT should automatically load in OpenXR these days provided that this option is not set in WMR. You don’t need SteamVR if you have a G2. As others have said, DCS is not broken. There must be something else on your PC (which is a good spec). 

 

Yep, haven't had that checked since the days of OpenComposite. Multithread does launch OpenXR but 9/10 times that's as far as it goes. I get to the selection menu, choose a mission or replay and just the aircraft loading screen with "progress" bar and music... yet the progress bar never moves. After about a minute of this, I can actually hear my PC/GPU fans spin down to idle. Meaning there's nothing happening requiring any attention from either fan control. After several more minutes of waiting, I simply click anywhere with the mouse and Windows displays "This application is not responding... click here to end process." Same as it's done since back in May/June(I think) after the patch that included the F-15E. It's been downhill ever since.

Note also, this is after a complete uninstall/Reinstall of DCS. Tried new installs of OB and currently Stable.

[Sr.]

Follow up:

After a rip and replace of the OpenXR toolkit, I can now launch ST mode as expected. Why this is, makes little sense to me if DCS "now supports OpenXR Natively."

And any previous attempt at running ST mode was done so without Steam running at all, let alone SVR.

MT still exhibits previously reported behavior, but like months ago, if I wait a certain amount of time then peak from under my HMD... I hear the fans spin up, then the sim takes off loading again.

 

clueless.

Edited October 16, 2023 by Sr.

[Chief_Biv]

Ok. I thought you said that DCS was loading SteamVR in ST. Unlike the MT version I think that you still have to force the ST version of DCS to use OpenXR. You need to attach that argument to the command line in your ST shortcut. There was a newer version for OpenXR Toolkit released in the last few months that was required to stop some crashes from occurring when using motion reprojection in MT (you can find that issue in other threads).

I have been suffering from long load times in VR after selecting a mission, particularly with a new aircraft module (newly selected module within each session). I have to ALT-TAB out of DCS, wait a while , and eventually DCS responds and then I can go back into DCS once I can see that the mission has loaded in the background. There are a number of other threads with people having similar sounding issues. There seems to be a recognised problem with the 12700 to 13900 intel CPU's. I am not aware of that also affecting 5800X3D CPU's. I had to turn off Intel's Hyper Threading in the BIOS to avoid constant crashes or VR stutters. Hopefully version 2.9 will fix some of these bugs. Despite the wait to load into a VR mission it's still worth the wait for me.

I cannot be sure if you are having the same problem. I don't have this waiting problem when in normal 2D mode and in  MT. Go figure. Do you have any problems in MT in 2D mode?

Edited October 17, 2023 by Chief_Biv

[Sr.]

9 hours ago, Chief_Biv said:

Ok. I thought you said that DCS was loading SteamVR in ST. Unlike the MT version I think that you still have to force the ST version of DCS to use OpenXR. You need to attach that argument to the command line in your ST shortcut. There was a newer version for OpenXR Toolkit released in the last few months that was required to stop some crashes from occurring when using motion reprojection in MT (you can find that issue in other threads).

I have been suffering from long load times in VR after selecting a mission, particularly with a new aircraft module (newly selected module within each session). I have to ALT-TAB out of DCS, wait a while , and eventually DCS responds and then I can go back into DCS once I can see that the mission has loaded in the background. There are a number of other threads with people having similar sounding issues. There seems to be a recognised problem with the 12700 to 13900 intel CPU's. I am not aware of that also affecting 5800X3D CPU's. I had to turn off Intel's Hyper Threading in the BIOS to avoid constant crashes or VR stutters. Hopefully version 2.9 will fix some of these bugs. Despite the wait to load into a VR mission it's still worth the wait for me.

I cannot be sure if you are having the same problem. I don't have this waiting problem when in normal 2D mode and in  MT. Go figure. Do you have any problems in MT in 2D mode?

 

Yes, ST mode was in fact loading in steam VR in spite of the force VR/openxr arguments and not having steam running at all. Sometimes I would see the oxr/wmr exploding triangles animation in the hmd, then the just dark screen...but nothing further in hmd. I could hear DCS music, Then I'd look at my monitor to see the typical VR view of the load hangar.

I do have the same load issue with 2D MT, but if I wait about 20 seconds after the mission load screen to appear, after the fans go to idle, I can click one time with the mouse and the fans spin up, load bar starts moving, then finishes or CTD. Still occasionally hang on the loading world detail section. Which usually flies by too fast to read it.

 

For me, this all began with the early access release of the F 15E.

Edited October 17, 2023 by Sr.

[WipeUout]

@Sr. This looks like a corrupted config file in your "Saved Games\DCS" folder.  

[Sr.]

10 hours ago, WipeUout said:

@Sr. This looks like a corrupted config file in your "Saved Games\DCS" folder.  

I had considered that. But after the fresh reinstall of stable, I also wiped away my Saved Games folder.

Same behavior.

[dburne]

2 hours ago, Sr. said:

I had considered that. But after the fresh reinstall of stable, I also wiped away my Saved Games folder.

Same behavior.

 

Yours is an issue somewhere with your setup, those can be quite troubling to identify and correct. Persevere, you will get it. Trust me, it is worth it.

[MAXsenna]

Note also, this is after a complete uninstall/Reinstall of DCS. Tried new installs of OB and currently Stable.

No point of doing that. A slow repair is much quicker, and makes it factory fresh.
Won't touch Saved Games, but I saw you renamed that one.

Cheers!


Sent from my SM-A536B using Tapatalk

[Sr.]

3 hours ago, dburne said:

 

Yours is an issue somewhere with your setup, those can be quite troubling to identify and correct. Persevere, you will get it. Trust me, it is worth it.

Any other day I would concur but, this all started the day I installed the early access of the F-15 patch.

2.8 I think.

[dburne]

8 hours ago, Sr. said:

Any other day I would concur but, this all started the day I installed the early access of the F-15 patch.

2.8 I think.

I have the F-15 as well. Have not flown it but have it.

[speed-of-heat]

10 hours ago, Sr. said:

Any other day I would concur but, this all started the day I installed the early access of the F-15 patch.

2.8 I think.

A couple of things you might want to check for, the first one , is that you aren't encountering a problem *similar* to this one:

the TLDR is, that DCS in MT can get "locked" on one "core" rather than spreading the load, the answer seems to be to disable the core affinity for the impacted core, (it seems to be 8 in the majority of cases but i found a similar issue with a different core on my CPU) as a diagnostic.

The second and i am sure you have done this is check that no other hygiene factors have been introduced, extra apps running in the background, or disk corruption, etc...

anyway best of luck 

[Sr.]

8 hours ago, speed-of-heat said:

A couple of things you might want to check for, the first one , is that you aren't encountering a problem *similar* to this one:

the TLDR is, that DCS in MT can get "locked" on one "core" rather than spreading the load, the answer seems to be to disable the core affinity for the impacted core, (it seems to be 8 in the majority of cases but i found a similar issue with a different core on my CPU) as a diagnostic.

The second and i am sure you have done this is check that no other hygiene factors have been introduced, extra apps running in the background, or disk corruption, etc...

anyway best of luck 

I gave that a look... while mine was mostly utilizing 4/8, disabling either of them is an immediate CTD.

[Hiob]

4 cores is the maximum DCS can utilize simultaniously right now if I'm not mistaken. So you where good. No point in disabling any then.

[Kayos]

Did anyone else get better performance turning off OpenXR when enabling DLSS?

[Sr.]

4 hours ago, Kayos said:

Did anyone else get better performance turning off OpenXR when enabling DLSS?

Now that I have fought my way into MT mode...

I think so. I haven't done any actual comparison but, I wanted to started some "testing" with base minimum goings on.

Right now I have OXR Toolkit disabled, OXRWMR resolution set at 150%, WMR 60Hz (I still prefer 60Hz to having to run any form of repro)

null

F-16 Take off, Caucuses. Low banking turns.

Visually absolutely stunning. It's almost TOO hi res in the cockpit. Frame rate never leaves 60.

I will note that now, even the standard clouds are more than good enough. No more emersion breaking, jaggedy lines where the clouds meet horizon of hilltops.

My in game settings: I honestly couldn't tell a difference between DLSS Perf/Quality slider at Balanced or Quality

 

null

Edited October 20, 2023 by Sr.

[Zebra1-1]

On 10/19/2023 at 7:07 PM, Sr. said:

Now that I have fought my way into MT mode...

I think so. I haven't done any actual comparison but, I wanted to started some "testing" with base minimum goings on.

Right now I have OXR Toolkit disabled, OXRWMR resolution set at 150%, WMR 60Hz (I still prefer 60Hz to having to run any form of repro)

null

F-16 Take off, Caucuses. Low banking turns.

Visually absolutely stunning. It's almost TOO hi res in the cockpit. Frame rate never leaves 60.

I will note that now, even the standard clouds are more than good enough. No more emersion breaking, jaggedy lines where the clouds meet horizon of hilltops.

My in game settings: I honestly couldn't tell a difference between DLSS Perf/Quality slider at Balanced or Quality

 

null

 

I would turn SSLR off.