Ubuntu 16.04 Kernel: Ubuntu 4.4.0-4.19-generic 4.4.1
There are seven WARNINGS in dmesg during boot. dmesg | grep "cut here" -A 1 [ 5.916356] ------------[ cut here ]------------ [ 5.916450] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12147 intel_atomic_check+0x307/0x6d0 [i915]() -- [ 5.917586] ------------[ cut here ]------------ [ 5.917661] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:11695 intel_plane_atomic_calc_changes+0x549/0x6b0 [i915]() -- [ 5.996083] ------------[ cut here ]------------ [ 5.996176] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12724 intel_modeset_check_state+0x556/0x910 [i915]() -- [ 6.100769] ------------[ cut here ]------------ [ 6.100853] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12147 intel_atomic_check+0x307/0x6d0 [i915]() -- [ 6.336057] ------------[ cut here ]------------ [ 6.336151] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12724 intel_modeset_check_state+0x556/0x910 [i915]() -- [ 6.338439] ------------[ cut here ]------------ [ 6.338516] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_fbdev.c:406 intel_fb_initial_config+0x2e4/0x5f0 [i915]() -- [ 6.342397] ------------[ cut here ]------------ [ 6.342413] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/drm_atomic_helper.c:682 drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]()
Happens also with mainline kernel 4.4.1-040401-generic.
Doesn't happen with mainline kernel 4.2.0-040200-generic.
Ubuntu 16.04
Kernel: Ubuntu 4.4.0-4.19-generic 4.4.1
There are seven WARNINGS in dmesg during boot. linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ display. c:12147 intel_atomic_ check+0x307/ 0x6d0 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ display. c:11695 intel_plane_ atomic_ calc_changes+ 0x549/0x6b0 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ display. c:12724 intel_modeset_ check_state+ 0x556/0x910 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ display. c:12147 intel_atomic_ check+0x307/ 0x6d0 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ display. c:12724 intel_modeset_ check_state+ 0x556/0x910 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ i915/intel_ fbdev.c: 406 intel_fb_ initial_ config+ 0x2e4/0x5f0 [i915]() linux-IIZPYL/ linux-4. 4.0/drivers/ gpu/drm/ drm_atomic_ helper. c:682 drm_atomic_ helper_ update_ legacy_ modeset_ state+0x26a/ 0x280 [drm_kms_helper]()
dmesg | grep "cut here" -A 1
[ 5.916356] ------------[ cut here ]------------
[ 5.916450] WARNING: CPU: 0 PID: 47 at /build/
--
[ 5.917586] ------------[ cut here ]------------
[ 5.917661] WARNING: CPU: 0 PID: 47 at /build/
--
[ 5.996083] ------------[ cut here ]------------
[ 5.996176] WARNING: CPU: 0 PID: 47 at /build/
--
[ 6.100769] ------------[ cut here ]------------
[ 6.100853] WARNING: CPU: 0 PID: 47 at /build/
--
[ 6.336057] ------------[ cut here ]------------
[ 6.336151] WARNING: CPU: 0 PID: 47 at /build/
--
[ 6.338439] ------------[ cut here ]------------
[ 6.338516] WARNING: CPU: 0 PID: 47 at /build/
--
[ 6.342397] ------------[ cut here ]------------
[ 6.342413] WARNING: CPU: 0 PID: 47 at /build/
Happens also with mainline kernel 4.4.1-040401- generic.
Doesn't happen with mainline kernel 4.2.0-040200- generic.