<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW ULT] clonemode of eDP and HDMI causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67609#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW ULT] clonemode of eDP and HDMI causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67609">bug 67609</a> from <a class="email" href="mailto:cancan.feng@intel.com" title="cancan,feng <cancan.feng@intel.com>"> cancan,feng</a> <pre>(In reply to <a href="show_bug.cgi?id=67609#c3">comment #3</a>) > Have you checked for any output netconsole yet? A few old kernels? This machine can only use USB network adapter, with which netconsole can't work. > Optimistically this used to work and we can bisect the cause. Yeah,this is a regression. I bisected this: 4906557eb37b7fef84fad4304acef6dedf919880 is the first bad commit commit 4906557eb37b7fef84fad4304acef6dedf919880 Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>> Date: Thu Jul 11 18:45:05 2013 -0300 drm/i915: Hook PSR functionality PSR must be enabled after transcoder and port are running. And it is only available for HSW. v2: move enable/disable to intel_ddi v3: The spec suggests PSR should be disabled even before backlight (by pzanoni) v4: also disabling and enabling whenever panel is disabled/enabled. v5: make it last patch to avoid breaking whenever bisecting. So calling for update and force exit came to this patch along with enable/disable calls. v6: Remove unused and unecessary psr_enable/disable calls, as notice by Paulo. CC: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>> Signed-off-by: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>> [danvet: Drop the psr exit code in the busy ioctl since I didn't merge that part of the infrastructure yet - it needs more thought.] Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> :040000 040000 df6a542740e60b0ae2ea72ea72caf0e3aed17869 5c326989834a202dd43030eb 4b6d69e1eb804ba2 M drivers</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> </ul> </body> </html>