<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW Regression]4k resolution can't be found when connect machine with 4k monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=81895#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW Regression]4k resolution can't be found when connect machine with 4k monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=81895">bug 81895</a> from <a class="email" href="mailto:lei.a.liu@intel.com" title="liulei <lei.a.liu@intel.com>"> liulei</a> <pre>==Bisect results== ---------------------------- Bisect shows: 0e32b39ceed665bfa4a77a4bc307b6652b991632 is the first bad commit commit 0e32b39ceed665bfa4a77a4bc307b6652b991632 Author: Dave Airlie <<a href="mailto:airlied@redhat.com">airlied@redhat.com</a>> AuthorDate: Fri May 2 14:02:48 2014 +1000 Commit: Dave Airlie <<a href="mailto:airlied@redhat.com">airlied@redhat.com</a>> CommitDate: Tue Jul 22 11:20:26 2014 +1000 drm/i915: add DP 1.2 MST support (v0.7) This adds DP 1.2 MST support on Haswell systems. Notes: a) this reworks irq handling for DP MST ports, so that we can avoid the mode config locking in the current hpd handlers, as we need to process up/down msgs at a better time. Changes since v0.1: use PORT_PCH_HOTPLUG to detect short vs long pulses add a workqueue to deal with digital events as they can get blocked on the main workqueue beyong mode_config mutex fix a bunch of modeset checker warnings acks irqs in the driver cleanup the MST encoders Changes since v0.2: check irq status again in work handler move around bring up and tear down to fix DPMS on/off use path properties. Changes since v0.3: updates for mst apis more state checker fixes irq handling improvements fbcon handling support improved reference counting of link - fixes redocking. Changes since v0.4: handle gpu reset hpd reinit without oopsing check link status on HPD irqs fix suspend/resume Changes since v0.5: use proper functions to get max link/lane counts fix another checker backtrace - due to connectors disappearing. set output type in more places fro, unknown->displayport don't talk to devices if no HPD asserted check mst on short irqs only check link status properly rebase onto prepping irq changes. drop unsued force_act Changes since v0.6: cleanup unused struct entry. [airlied: fix some sparse warnings].</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>