[1993:1993:0526/215201.057406:WARNING:media/gpu/vaapi/vaapi_wrapper.cc:1648] drmGetDevices2() has not found any devices
[1993:1993:0526/215201.066758:WARNING:sandbox/policy/linux/sandbox_linux.cc:404] InitializeSandbox() called with multiple threads in process gpu-process.
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3882200) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x16x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3884180) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x16x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3883000) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=64x64x1
[1993:1993:0526/215201.399785:ERROR:gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc:1178] []Automatic fallback to software WebGL has been deprecated. Please use the --enable-unsafe-swiftshader flag to opt in to lower security guarantees for trusted content.
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa38e6c00) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=4x4x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa38e6f80) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=4x4x1
[1959:1959:0526/215201.418288:INFO:CONSOLE:10] "GL_RENDERER: ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver)", source: http://127.0.0.1:8080/poc.html (10)
[1959:1959:0526/215201.418385:INFO:CONSOLE:10] "GL_VENDOR:   Google Inc. (Google)", source: http://127.0.0.1:8080/poc.html (10)
[1993:1993:0526/215201.423242:ERROR:gpu/command_buffer/service/gl_utils.cc:430] [.WebGL-0x731eac1e9a80]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels
[POC-TRACE] flushStagedUpdatesImpl(this=0x7a7aa3898260) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=780x580x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x7a7aa3898260) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=780x580x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa38ed180) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=2048x2048x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3941c00) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=256x64x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa394b280) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=256x64x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3968e80) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3969900) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396a000) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=1x1x1
[1993:1993:0526/215201.683110:ERROR:gpu/command_buffer/service/gl_utils.cc:430] [.WebGL-0x731eac1e9a80]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels
[1959:1959:0526/215202.045760:INFO:CONSOLE:10] "1x1x1 RRI readback (expect 0,0,0,0): 0,0,0,0", source: http://127.0.0.1:8080/poc.html (10)
[POC-TRACE] ImageHelper::removeStagedUpdates(this=0x79eaa396a000, levels=[0,0]) mCurrentSingleClearValue.valid()=1  <-- cache NOT reset here
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396a000) PRIMED mCurrentSingleClearValue level=0 layer=0 count=4 extents=256x256x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396c680) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=32x16x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396ca00) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=32x16x1
[1959:1959:0526/215202.085985:INFO:CONSOLE:10] "Total bytes scanned : 1048576", source: http://127.0.0.1:8080/poc.html (10)
[1959:1959:0526/215202.086057:INFO:CONSOLE:10] "Non-zero bytes      : 0", source: http://127.0.0.1:8080/poc.html (10)
[1959:1959:0526/215202.086107:INFO:CONSOLE:10] "Sentinel pixels hit : 0 (CA FE BA BE)", source: http://127.0.0.1:8080/poc.html (10)
[1959:1959:0526/215202.086171:INFO:CONSOLE:10] ">>> NOT REPRODUCED: all pixels were zero (RRI clear was applied, or allocator zeroed memory).", source: http://127.0.0.1:8080/poc.html (10)
[POC-TRACE] *** flushStagedUpdates(this=0x79eaa38e6c00) DROPPING clear on level=0 (cached==staged); current VkImage extents=4x4x1 layers=1 ***
[1959:1959:0526/215202.111580:INFO:CONSOLE:132] "[]Automatic fallback to software WebGL has been deprecated. Please use the --enable-unsafe-swiftshader flag to opt in to lower security guarantees for trusted content.", source: http://127.0.0.1:8080/poc.html (132)
[1959:1959:0526/215202.112831:INFO:CONSOLE:132] "[.WebGL-0x731eac1e9a80]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels", source: http://127.0.0.1:8080/poc.html (132)
[1959:1959:0526/215202.113634:INFO:CONSOLE:132] "[.WebGL-0x731eac1e9a80]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels", source: http://127.0.0.1:8080/poc.html (132)
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396e280) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=32x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa396e600) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=32x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa392e480) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=2048x2048x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa392f980) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa392dd80) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=16x32x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3945e80) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=256x64x1
[POC-TRACE] flushStagedUpdatesImpl(this=0x79eaa3944d00) PRIMED mCurrentSingleClearValue level=0 layer=0 count=1 extents=256x64x1