<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BXT] GPU HANG: ecode 9:2:0xbefffffe, in Main Thread [4018], reason: Hang on bsd ring," href="https://bugs.freedesktop.org/show_bug.cgi?id=106262#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BXT] GPU HANG: ecode 9:2:0xbefffffe, in Main Thread [4018], reason: Hang on bsd ring," href="https://bugs.freedesktop.org/show_bug.cgi?id=106262">bug 106262</a> from <a class="email" href="mailto:patrick.beaulieu@avigilon.com" title="Patrick Beaulieu <patrick.beaulieu@avigilon.com>"> Patrick Beaulieu</a> <pre>(In reply to Jani Nikula from <a href="show_bug.cgi?id=106262#c8">comment #8</a>) > (In reply to Patrick Beaulieu from <a href="show_bug.cgi?id=106262#c6">comment #6</a>) > > What is the official intel-gfx position on enable_rc6=0 and/or max_cstate=1 ? > > Should we be using these if the goal is maximum stability? > > enable_rc6 parameter has been removed upstream. In general, I can't > recommend anyone running non-default i915 parameters. Most of them are for > debugging, taint the kernel, and aren't properly tested. If you have issues, > we'll only support the default settings. How do you align that with errata from intel for certain platforms (baytail, possibly apollolake/broxton as well) that basically says "using low power states may hang your system due to hardware issue, we recommend max C1 and disable rc6" I won't paste the exact text since the doc is supposed to be confidential: But somebody has it up for reading. <a href="http://advci.eastasia.cloudapp.azure.com/wordpress/wp-content/uploads/2017/05/570005_Intel_Celeron_Processor_J1900_Sighting_Alert_4995585_Rev1_0.pdf#page=4">http://advci.eastasia.cloudapp.azure.com/wordpress/wp-content/uploads/2017/05/570005_Intel_Celeron_Processor_J1900_Sighting_Alert_4995585_Rev1_0.pdf#page=4</a> There are also numerous bugs/hangs filed in this project where the suggested and functioning workaround is enable_rc6=0 I see some are complaining about enable_rc6 being taken away already: <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [KBL] "enable_rc6" parameter deprecation brings back freezing" href="show_bug.cgi?id=105962">https://bugs.freedesktop.org/show_bug.cgi?id=105962</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>