<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Video cutout on Kaby Lake U processors." href="https://bugs.freedesktop.org/show_bug.cgi?id=107543#c35">Comment # 35</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Video cutout on Kaby Lake U processors." href="https://bugs.freedesktop.org/show_bug.cgi?id=107543">bug 107543</a> from <a class="email" href="mailto:mahesh1.kumar@intel.com" title="Mahesh Kumar <mahesh1.kumar@intel.com>"> Mahesh Kumar</a> <pre>Hi, As issue seems something to do with memory with high load or coming out of stand-by. I would like to rule-out one more variable by disabling memory c-states. which we can do by making WM latency 0 for level 1->7. for making latency 0 please write following #echo "2 0 0 0 0 0 0 0" > /sys/kernel/debug/dri/0/i915_pri_wm_latency This will disable all the lower memory C-states except level-0, rebooting system will restore default latency values. If issue is due to lower memory c-states, above will make issue hard to reproduce (or not reproducible). If this is helping with issue, we may need to get help from HW team for getting actual fix/WA for the issue. If this is not helping we may need to start debugging in different direction. Please attach complete dmesg logs for precious scenario <a href="show_bug.cgi?id=107543#c33">comment#33</a> & #34 & this scenario as well :)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>