Samsung GearVR S7 again signal 11 crash

Development Rendering
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1

I have 2 Samsung S7, I try to run the same app on both, my S7 are

SM-G930A (AT&T version) Qualcomm MSM8996 Snapdragon 820, Adreno 530
Android Version: 6.0.1
VR service version: 2.5.38/253801000

and

SM-G930FD (International Version) Exynos 8890 Octa, Mali-T880 MP12
Android Version: 6.0.1
VR Service version: 2.4.29/242900000

With the same app, SM-G930FD one run without any issue, and SM-G930A one crash with a singal 11. Both of the machine can run the game when GearVR mode turn of (only 1 viewport rendering).

For the crash,

09-12 02:59:00.146: D/UE4(24387): AndroidEGL::ResetDisplay()
09-12 02:59:00.186: D/UE4(24387): [2016.09.11-17.59.00:193][  0]LogHMD: !!! Rendering thread is released! tid = 24433
09-12 02:59:00.186: D/UE4(24387): [2016.09.11-17.59.00:193][  0]LogHMD: !!! Rendering thread is acquired! tid = 24454
09-12 02:59:00.196: D/UE4(24387): AndroidEGL::ResetDisplay()
09-12 02:59:00.196: D/UE4(24387): [2016.09.11-17.59.00:204][  0]LogHMD: !!! Rendering thread is released! tid = 24454
09-12 02:59:00.196: D/UE4(24387): [2016.09.11-17.59.00:204][  0]LogHMD: Allocating Render Target textures
09-12 02:59:00.196: D/UE4(24387): [2016.09.11-17.59.00:204][  0]LogHMD: Allocated a new swap texture set (size 2048 x 1024)
09-12 02:59:00.196: D/UE4(24387): [2016.09.11-17.59.00:205][  0]LogHMD: Allocated textureSet 0xa1179180 (2048 x 1024), fr = 1
09-12 02:59:00.206: D/UE4(24387): [2016.09.11-17.59.00:208][  0]LogHMD: !!! Rendering thread is acquired! tid = 24456
09-12 02:59:00.286: D/UE4(24387): [2016.09.11-17.59.00:291][  0]LogRenderer: Reallocating scene render targets to support 2048x1024 (Frame:2).
09-12 02:59:00.326: D/UE4(24387): +++++++ EnterVRMode ++++++, tid = 24414
09-12 02:59:01.986: D/UE4(24387): [2016.09.11-17.59.01:990][  0]LogHMD:Warning: Skipping frame: No RenderContext set
09-12 02:59:01.986: D/UE4(24387): [2016.09.11-17.59.01:991][  0]LogHMD: EnterVRMode: Display 0x1, Window 0xEE672708, ShareCtx EE53F040
09-12 02:59:02.486: D/UE4(24387): ------- EnterVRMode -------, tid = 24414
09-12 02:59:02.866: D/UE4(24387): [2016.09.11-17.59.02:872][  0]LogHMD: Just mounted
09-12 02:59:03.376: D/UE4(24387): Signal 11 caught!

And by looking at log by PID, I got more info

09-12 03:52:34.736: W/TimeWarp(24387): WarpToScreen: No valid eye buffers
09-12 03:52:34.736: W/TimeWarp(24387): WarpToScreen: Nothing valid to draw
09-12 03:52:34.806: D/libEGL(650): eglInitialize EGLDisplay = 0x7fc5740278
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc040094a (IOCTL_KGSL_GPU_COMMAND) failed: errno 35 Resource deadlock would occur
09-12 03:52:34.826: W/Adreno-GSL(24387): <log_gpu_snapshot:384>: panel.gpuSnapshotPath is not set.not generating user snapshot
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc040094a (IOCTL_KGSL_GPU_COMMAND) failed: errno 35 Resource deadlock would occur
09-12 03:52:34.826: W/Adreno-GSL(24387): <log_gpu_snapshot:384>: panel.gpuSnapshotPath is not set.not generating user snapshot
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc040094a (IOCTL_KGSL_GPU_COMMAND) failed: errno 35 Resource deadlock would occur
09-12 03:52:34.826: W/Adreno-GSL(24387): <log_gpu_snapshot:384>: panel.gpuSnapshotPath is not set.not generating user snapshot
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc040094a (IOCTL_KGSL_GPU_COMMAND) failed: errno 35 Resource deadlock would occur
09-12 03:52:34.826: W/Adreno-GSL(24387): <log_gpu_snapshot:384>: panel.gpuSnapshotPath is not set.not generating user snapshot
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc040094a (IOCTL_KGSL_GPU_COMMAND) failed: errno 35 Resource deadlock would occur
09-12 03:52:34.826: W/Adreno-GSL(24387): <log_gpu_snapshot:384>: panel.gpuSnapshotPath is not set.not generating user snapshot
09-12 03:52:34.826: W/Adreno-GSL(24387): <gsl_ldd_control:475>: ioctl fd 38 code 0xc0140933 (IOCTL_KGSL_TIMESTAMP_EVENT) failed: errno 22 Invalid argument
09-12 03:52:34.826: W/Adreno-GSL(24387): <ioctl_kgsl_syncobj_create:2979>: (27, 10, 42240) fail 22 Invalid argument
09-12 03:52:34.826: W/TimeWarp(24387): eglCreateSyncKHR returned EGL_NO_SYNC_KHR
09-12 03:52:34.826: W/TimeWarp(24387): VSync 51755633: eye=1,late=0.1ms,over=0.0ms,CPU=70.0ms,GPU>=0.1
09-12 03:52:34.826: W/TimeWarp(24387): eglClientWaitSyncKHR returned EGL_FALSE
09-12 03:52:34.826: D/UE4(24387): Signal 11 caught!

Is the log showing some GPU driver issue? Can someone provide some direction to find out more what is going on?

2

Are you using any masked materials? It’s a known issue for snapdragon S7 and UE4:

If not are you using Fresnels on instanced static meshes? Then it’s also a known issue for snapdragon S7 and UE4:

Either way would not surprise me to find out there are more UE4 features that cause this driver crash on the snapdragon S7 devices :frowning:

3

Wow, that’s suck… I wonder what is the status of those issue since it is in Engine version 4.11 while I am using 4.12

4

So are you using one of those things? If so would be great if you could comment in the relevant answerhub to get some more friction there :wink:

5

Yes, the masked material, I will post what I found on that post