I submitted the bug report at https://bugs.freedesktop.org/show_bug.cgi?id=109245 . The dmesg log is attached to the bug report.
Daniel
On Mon, 7 Jan 2019 at 14:34, Ville Syrjälä ville.syrjala@linux.intel.com wrote:
On Sat, Jan 05, 2019 at 12:47:12AM +0100, Daniel Kamil Kozar wrote:
Hello. After upgrading the kernel to 4.20, I noticed that the boot time increased from about 5 seconds to 25 seconds. My machine is an Asus K53SV with an Intel i7-2630QM, i.e. Sandy Bridge. I have an external display connected to it via HDMI. If the display is unplugged when booting the machine, the boot time stays at its old value. The kernel log shows two messages like this :
[ 15.747206] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:39:pipe A] flip_done timed out [ 26.198968] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:39:pipe A] flip_done timed out
Hrm. With SNB I would be tempted to blame the LP3 watermarks, but 4.20 already has commit 21556350ade3 ("drm/i915: Disable LP3 watermarks on all SNB machines").
Can you file a bug at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Int... and attach the full dmesg from the boot with drm.debug=0xe passed to the kernel cmdline?
-- Ville Syrjälä Intel