For 4.8 you need SDK version 0.6.0.1! No previous version will work properly.
Are you using Nvidia? -> Downgrade driver to 350.12
Is your tracking camera or rift or both plugged into an USB 3 port -> plug into USB 2
If it still doesn’t work, come back here 
I checked all of that first and everything was up to date, i also tried both USB 3.0 and 2.0 but i did not try rolling back my NVidia driver so i will give it a try tonight - Thanks!
I actually ended up doing a reformat of my OS drive since i had a hard drive fail a few months ago and it had some old install path references which might have been effecting my Visual Studio install.
Still not working!
I rolled back the video card drivers, did a full reformat of my OS disk, disabled SLI, re-updated the firmware and swapped the usb and HDMI positions
I also just noticed that Direct to HMD does not work at all on any apps for the headset, it only comes on when it’s in Extended mode…
The blue light on the camera comes on every time in Direct mode but the light on the headset stays orange.
Any ideas? Below are my system specs:
**- Core i7 980 @ 3.33ghz
I noticed that when I use 4.8.1 (haven’t tried with other versions) and have blueprints open, VR preview doesn’t show anything on my Rift DK2, but as soon as I close down all blueprint windows, it works as it should. Now I don’t remember which runtime version I have and I’m not currently at work to check it out, but this might be worth trying.
CharlestonS, I have no idea. Maybe of your graphics cards are unsupported. Can you try your Rift on another system with a more recent card (I know it works with a GTX 660 and of course 970/980)?
I and a friend suffer the same problem, I have old card (560 TI) but works without inconvenience in U4.7
Did you try to manually deactivate the CPU graphics in the device manager?
I’m not sure if I understand you, if you mean about integrated in motherboard I’d already deactivated direct in the BIOS, in the device manager just appears the Nvidia adaptor
Looks like the fault is if there are a widget viewport (overlay) active
So the DK2 now works in other VR apps just fine in Direct mode and now when i try to run VR Preview in UE4 it actually crashes with an error log which is below, any ideas - I noticed that it is referencing *D:* but i don’t have a D: drive…
Fatal error: [File: D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 651]
Rendering thread exception:
Assertion failed: ViewFamily.RenderTarget->GetRenderTargetTexture() [File: D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Plugins\Runtime\OculusRift\Source\OculusRift\Private\OculusRiftRender.cpp] [Line: 141]
KERNELBASE.dll {0x000007fefd43b3dd} + 0 bytes
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() {0x000007fee5f47c0f} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FOutputDevice::Logf__VA() {0x000007fee5e010b8} + 159 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FDebug::AssertFailed() {0x000007fee5dd1e72} + 65 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-OculusRift.dll!OculusRift::FViewExtension::PreRenderViewFamily_RenderThread() {0x000007fed54fad45} + 0 bytes
UE4Editor-Renderer.dll!RenderViewFamily_RenderThread() {0x000007fee1620f30} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Renderer.dll!TGraphTask<FRendererModule::BeginRenderingViewFamily'::17’::EURCMacro_FDrawSceneCommand>::ExecuteTask() {0x000007fee15e1321} + 18 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FTaskThread::ProcessTasks() {0x000007fee5c8651e} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FTaskThread::ProcessTasksUntilQuit() {0x000007fee5c8674d} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-RenderCore.dll!RenderingThreadMain() {0x000007fef34a5d3b} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-RenderCore.dll!FRenderingThread::Run() {0x000007fef34a624f} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FRunnableThreadWin::Run() {0x000007fee5f469e8} + 0 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() {0x000007fee5f3188d} + 8 bytes d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
kernel32.dll {0x00000000773b59cd} + 0 bytes
ntdll.dll {0x00000000775eb981} + 0 bytes
ntdll.dll {0x00000000775eb981} + 0 bytes
really strange. have you compiled from source or do you use the launcher version?
(the “d:” comes from epic and their buildservers, nothing to worry about)
Glad to hear that the D: is an Epic thing but yeah, i use the launcher version and i need it to work without a compile version.
Everything was fine up until 4.8 came along.
mmm… strange… running out of ideas
can you compile a new “blank” project with shipping configuration and alt+enter into rift mode? maybe this works and it’s “just” an issue with the vr preview…?
I’m having the same problem. How do I install the older nvidia 350.12 driver?
I tried rolling back to a previous driver but I cannot even tell which one I have installed right now.
This what I see in Device Manager:
When I go to the Nvidia website to find drivers it won’t even let me download them!?
After all the time I’ve wasted trying to fix this I think It would just be faster for me to redo my project in Unreal 4.7
I’m actually getting a similar error, using 4.8.2 compiled from Github.
One day I came into the office, and the Oculus Runtime just started crashing. It would have nothing but a black screen, and when I’d click that black screen… the runtime would crash and I’d get “57493-Public TCID:158609 is not responding”. I boiled this issue down to a problem with the latest Nvidia drivers, and had to roll back all the way to GeForce 347.88 before it would work correctly again.
Despite that, UE 4.8.0 refused to load anything VR related (neither Preview nor Standalone), continually crashing with this error:
I updated UE to 4.8.2, and it gives the same error.
Opening projects in previous versions of the engine seems to work. For example, a project I have in 4.7.6 works just fine.
I wouldn’t bother rolling back the drivers, it didn’t do anything for me - I think this is just an issue that either Epic or Oculus have to address.
But if you do want to roll back your drivers you can find the legacy Nvidia drivers here - http://www.geforce.com/drivers/beta-legacy
After you have the drivers downloaded you would want to go to** Control panel** > Uninstall Program and look for Nvidia Graphics Driver then uninstall it.
**Restart **your computer then Install the legacy driver then Restart again.
As stated in my post, rolling back the Nvidia drivers did not solve UE 4.8.x crashes.
Instead, it solved a different problem I was having, a crash in the Oculus Runtime 0.6: “57493-Public TCID:158609 is not responding”.
The Unreal 4.8 error is the following, and yes, it’s probably a fix for Epic:
Rolling back your Unreal project to use version 4.7.6 should alleviate the issue.
you may have already alluded to trying this, but when i ran into this problem as well (or similar), I put the DK2 in the first video port (happens to be DVI), and then when UE4 didn’t recognize the DK2, i ran the demo scene. demo scene ran fine, so closed out, and then opened UE4 after which it worked. this was in extended mode. not really sure of the logic here, but that sequence worked on different two machines.
yeah, rolling back the drivers did nothing but make me even more frustrated than I already was. I wasted 3 nights in a row staying up late after work trying out all the suggested fixes I found online.
All I got was bluescreens, and Unreal crashing every time I retried to open my Project done in 4.8
I’m just going to go back and recreate my project with 4.7