<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [KBL LSPCON] Linux will reboot when installing with connect HDMI monitor (include PS175 LSPCON)" href="https://bugs.freedesktop.org/show_bug.cgi?id=105325#c18">Comment # 18</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [KBL LSPCON] Linux will reboot when installing with connect HDMI monitor (include PS175 LSPCON)" href="https://bugs.freedesktop.org/show_bug.cgi?id=105325">bug 105325</a> from <a class="email" href="mailto:jameshohuang@supermicro.com" title="James <jameshohuang@supermicro.com>"> James</a> <pre>Hi Shashank, PS175 vendor pointed the reset is caused by send DPCD command address: 0x00600 Data: 02 I check the code, and Linux will set D3 power when booting. #define DP_SET_POWER 0x600 # define DP_SET_POWER_D0 0x1 # define DP_SET_POWER_D3 0x2 void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) { int ret, i; /* Should have a valid DPCD by this point */ if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) return; if (mode != DRM_MODE_DPMS_ON) { if (downstream_hpd_needs_d0(intel_dp)) return; ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); } else { Is there any boot option we can skip DP set power d3?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>