<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb] Frequent framerate drops" href="https://bugs.freedesktop.org/show_bug.cgi?id=81682#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb] Frequent framerate drops" href="https://bugs.freedesktop.org/show_bug.cgi?id=81682">bug 81682</a> from <a class="email" href="mailto:bugsfreedesktop@emeraldreverie.org" title="Greg Sutcliffe <bugsfreedesktop@emeraldreverie.org>"> Greg Sutcliffe</a> <pre>Thanks Chris, with your help on IRC I got a custom kernel and the overlay working. In case it matters, I'm using 3.16.0-rc6-290399-gd4990be with i915 builtin. Running Space Hulk, typically the GPU seems to sit at 1000-1100MHz and consumes ~1100mW power. When the issue strikes, all the graphs show a substantial drop - power drops to 600mW, freq to 650MHz and frame rate goes through the floor. Interestingly the purple CPU graph in the top right shows an uptick in usage at the same time (typically jumping from 100-120% busy to 200-240% busy, but has been as high as 500% busy), but I can't find a separate process that might be responsible for that. Top reports the game, firefox, and intel-gpu-overlay as the top three process during such a slowdown. I've taken a few screenshots using my mobile phone - terrible, I know, but since the overlay is outside the normal display system, my usual screenshot tools can't capture it. Happy to re-do them if there's a better way to capture the images. I've also attached my xorg config and kernel module config for i915, in case it's useful. What's next to investigate?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>