<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [SKL] fbo-depth-array causes GPU hangs" href="https://bugs.freedesktop.org/show_bug.cgi?id=91062#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [SKL] fbo-depth-array causes GPU hangs" href="https://bugs.freedesktop.org/show_bug.cgi?id=91062">bug 91062</a> from <a class="email" href="mailto:neil@linux.intel.com" title="Neil Roberts <neil@linux.intel.com>"> Neil Roberts</a> <pre>As indicated by Ben in <a href="show_bug.cgi?id=91062#c2">comment 2</a>, I think the failure is related to the fact that it is creating a really large colour buffer (8192x8192) and has nothing to do with the depth/stencil buffer. I can replicate a hang by running the really simple test below: <a href="https://raw.githubusercontent.com/bpeel/piglit/big-window/tests/fbo/big-window.c">https://raw.githubusercontent.com/bpeel/piglit/big-window/tests/fbo/big-window.c</a> If I run it a few times (fewer than 20) then it consistently hangs. This doesn't use a depth or stencil buffer at all and just does a glClear on the large colour buffer. The width that it is using (8192) is a little bit special because that is the point at which Mesa will switch to using a linear buffer instead of tiling (see brw_tex_layout.c line 678). If I comment out that section so that it uses y-tiling anyway then it doesn't hang any more.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>