<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - UE4Editor crash after pressing "play" with radeon southern island card (7850 HD)" href="https://bugs.freedesktop.org/show_bug.cgi?id=101325#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - UE4Editor crash after pressing "play" with radeon southern island card (7850 HD)" href="https://bugs.freedesktop.org/show_bug.cgi?id=101325">bug 101325</a> from <a class="email" href="mailto:julien.isorce@gmail.com" title="Julien Isorce <julien.isorce@gmail.com>"> Julien Isorce</a> <pre>Hi Luke, I can reproduce the ring stalled issue using your apitrace 100% of the time. In apitrace output I could notice: warning: extension `GL_EXT_gpu_shader4' unsupported in fragment shader message: api issue 4: FBO incomplete: no attachments and default width or height is 0 [-1] message: api performance issue 5: using glBufferSubData(buffer 1599, offset 0, size 288) to update a GL_STATIC_DRAW buffer message: shader compiler issue 2: LLVM diagnostic (remark): <unknown>:0:0: 895 instructions in function message: shader compiler issue 3: too many identical messages; ignoring Using GALLIUM_DDEBUG and check_vm I could get some msg like: [1;32mPS - Constant buffer slot 4 (GPU list):ESC[0m ESC[1;33mSQ_BUF_RSRC_WORD0ESC[0m <- 0x000de0e0 ESC[1;33mSQ_BUF_RSRC_WORD1ESC[0m <- BASE_ADDRESS_HI = 0 STRIDE = 7200 (0x1c20) CACHE_SWIZZLE = 0 SWIZZLE_ENABLE = 0 ESC[1;33mSQ_BUF_RSRC_WORD2ESC[0m <- 0x4000c007 ESC[1;33mSQ_BUF_RSRC_WORD3ESC[0m <- DST_SEL_X = SQ_SEL_X DST_SEL_Y = SQ_SEL_0 DST_SEL_Z = SQ_SEL_0 DST_SEL_W = SQ_SEL_1 NUM_FORMAT = BUF_NUM_FORMAT_UNORM DATA_FORMAT = BUF_DATA_FORMAT_INVALID ELEMENT_SIZE = 2 INDEX_STRIDE = 2 ADD_TID_ENABLE = 1 ATC = 0 HASH_ENABLE = 0 HEAP = 0 MTYPE = 2 TYPE = SQ_RSRC_BUF_RSVD_2 USER_VM_ENABLE = 0 USER_VM_MODE = 1 NV = 0 !!!!! This slot was corrupted in GPU memory !!!!! I am using lastest git mesa, xserver, ddx, llvm and amd-staging-4.9 kernel. Similar result with amdgpu though it does not detect the gpu hang, all I can see is with radeontop, the graphic pipe is stuck at 100% for ever, but no error in dmesg. And indeed R600_DEBUG=nowc does not help in that case. I have the feeling that this is a llvm issue due to exotic shaders but only maintainers will be able to help you at this point. Providing this is 100% reproductible on SI chip class (at least) on both radeon and amdgpu drivers, it would be intersting to know if it happens on a more recent graphic card too.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>