<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [ILK]igt/kms_render/gpu-blit randomly causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67243#c17">Comment # 17</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [ILK]igt/kms_render/gpu-blit randomly causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67243">bug 67243</a> from <a class="email" href="mailto:imre.deak@gmail.com" title="Imre Deak <imre.deak@gmail.com>"> Imre Deak</a> <pre>Created <a href="attachment.cgi?id=85190" name="attach_85190" title="debug ironlake_crtc_disable">attachment 85190</a> <a href="attachment.cgi?id=85190&action=edit" title="debug ironlake_crtc_disable">[details]</a> <a href='page.cgi?id=splinter.html&bug=67243&attachment=85190'>[review]</a> debug ironlake_crtc_disable (In reply to <a href="show_bug.cgi?id=67243#c16">comment #16</a>) > Test patch 1, 1+2, 1+2+3, 1+2+3+4, 1+2+3+4+5, It still happens. Thanks, that narrows it down to a: fb = kmstest_create_fb2(); drmModeSetCrtc(fb); kmstest_remove_fb(fb); loop. And considering your dmesg that seems to point to somewhere in ironlake_crtc_disable() when calling kmstest_remove_fb(). I attached a kernel patch to add debug info to ironlake_crtc_disable(). I noticed only now that you are missing some useful debugging options from your kernel .config, please enable them (and I suggest keeping them on for the future too): CONFIG_LOCKUP_DETECTOR CONFIG_DETECT_HUNG_TASK CONFIG_PROVE_LOCKING Then please run the test again with all the disable patches 1-5 applied and the attached kernel patch, and provide a new dmesg log (with drm.debug=0xf and including everything starting from boot-up) and the output from the test.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>