I completed the bisect, here is the result:
$ git bisect bad fdbc3b1f639bb2cbfb32c612b2699e0ba373317d fdbc3b1f639bb2cbfb32c612b2699e0ba373317d is the first bad commit $ git show commit fdbc3b1f639bb2cbfb32c612b2699e0ba373317d Author: Jani Nikula <jani.nik...@intel.com> Date: Tue Nov 12 17:10:13 2013 +0200 drm/i915/dp: set sink to power down mode on dp disable We used to put the local sink and any downstream sinks to power down mode at disable or dpms off using the DPCD SET_POWER register, until this was broken by commit e8cb455876fa8f67c6aba394d0a14b697bf04cc3 Author: Daniel Vetter <daniel.vet...@ffwll.ch> Date: Sun Jul 1 13:05:48 2012 +0200 drm/i915/dp: convert to encoder disable/enable Fix it. Signed-off-by: Jani Nikula <jani.nik...@intel.com> Reviewed-by: Todd Previte <tprev...@gmail.com> Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index eb8139d..0b2e842 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1774,7 +1774,7 @@ static void intel_disable_dp(struct intel_encoder *encoder) * ensure that we have vdd while we switch off the panel. */ ironlake_edp_panel_vdd_on(intel_dp); ironlake_edp_backlight_off(intel_dp); - intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); ironlake_edp_panel_off(intel_dp); /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1343543 Title: [Dell XPS 15 L502X] X stops responding to input after entering idle power saving (screen off) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1343543/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs