Created attachment 105358 [details] Camera photo of locked up screen Prompted by a request in bug #82207 to re-test another bug in drm-intel-nighly (c30b73c) I was confronted with an early kernel lockup during boot happening when plymouth switches to the FB console to prompt for my LUKS password. Once that happens the screen just shows a few bright pixels and the system can only be rebooted by long-pressing the power button. I bisected the issue and came up with the following responsible commit: commit d91a2cb8e5104233c02bbde539bd4ee455ec12ac Author: Sonika Jindal <sonika.jindal@intel.com> Date: Fri Aug 22 14:06:04 2014 +0530 drm/i915: Add 180 degree primary plane rotation support System environment: -- chipset: QM87 -- system architecture: x86_64 -- xf86-video-intel/xserver/mesa/libdrm version: - xf86-video-intel: 2.99.914 (git commit f36b7a4aac86f5874c32d8f516ac1f00a6c8d8b3) - xserver: 1.15.1 - mesa: 10.1.3 - libdrm: 2.4.52 -- kernel version: drm-intel-nightly c30b73c -- Linux distribution: Kubuntu 14.04 -- Machine or mobo model: Lenovo ThinkPad T440p 20AN w/ Core i7-4800MQ -- Display connector: DVI, DisplayPort The red stripes in the first few lines of the screen are only present for some revisions, so they may be caused by a different commit.
Probably http://patchwork.freedesktop.org/patch/32484/
(In reply to comment #1) > Probably http://patchwork.freedesktop.org/patch/32484/ It's been merged now, please retest current drm-intel-nightly. commit b79c2e7e7121812df7f4451d8556a0cfc81487f1 Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Wed Aug 27 17:48:41 2014 +0300 drm/i915: Don't dereference fb when disabling primary plane
Confirmed that the freeze is gone.
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