<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT SKL] GPU death starting with first symptom: WARNING backtrace: "DC6 already programmed to be enabled."" href="https://bugs.freedesktop.org/show_bug.cgi?id=93768#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT SKL] GPU death starting with first symptom: WARNING backtrace: "DC6 already programmed to be enabled."" href="https://bugs.freedesktop.org/show_bug.cgi?id=93768">bug 93768</a> from <a class="email" href="mailto:patrik.r.jakobsson@gmail.com" title="Patrik Jakobsson <patrik.r.jakobsson@gmail.com>"> Patrik Jakobsson</a> <pre>It seems we're accessing DC_STATE_EN with PG0 off. The DMC should trap and fix this but apparently fails. Looks like it's not waiting for PG0 to come back up. The result is that we mess up the DMC hw state bits and get unexpected results. Reading DC_STATE_EN with PG0 off gives me all bits as 1's. We could poll until we get sensible data from the register or perhaps just manually power on PG0.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>