Created attachment 119436 [details]
dmesg log file

Regression : 
------------
Not sure.

Setup:
------
Hardware
Platform: SKY LAKE Y A0 
CPU : Intel(R) Core(TM) m5-6Y57 CPU @ 1.10GHz (family: 6, model: 78  stepping: 3)
MCP : SKL-Y  D0 2+2 (ou ULX-D1)
QDF : QJA4 
CPU : SKL D0
Chipset PCH: Sunrise Point LP C1       
CRB : SKY LAKE Y LPDDR3 RVP3 CRB FAB2
Reworks : All Mandatories

Software
Linux : Ubuntu 15.04 64 bits
BIOS : SKLSE2R1.R00.X100.B01.1509220551
ME FW : 11.0.0.1179
Ksc (EC FW): 1.19

kernel 4.3.0-rc7-nightly+
commit 86ba603f327626055fe1436112b3786eaaaf7fb1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Sat Oct 31 09:27:21 2015 +0100

    drm-intel-nightly: 2015y-10m-31d-08h-26m-39s UTC integration manifest

cairo: 1.14.2
drm: libdrm-2.4.65
intel-driver: 1.6.1
libva: libva-1.6.1
mesa: mesa-11.0.4
xf86-video-intel: 2.99.917
xserver: xorg-server-1.17.2
intel-gpu-tools: master, bfea74a9f64a900bcb90f946b38746781017449f 

Steps:
------
1. # ./kms_flip --run-subtest flip-vs-expired-vblank-interruptible
2. # ./kms_flip --run-subtest flip-vs-expired-vblank
3. # ./kms_flip --run-subtest flip-vs-expired-vblank-interruptible

Actual result:
---------------
At the steps 1 and 2 the tests pass, but at the step 3 the test fail.

Expected result:
----------------
At the step 3 the result is pass.

Program output:
---------------
IGT-Version: 1.12-gbfea74a (x86_64) (Linux: 4.3.0-rc7-nightly+ x86_64)
Using monotonic timestamps
Beginning flip-vs-expired-vblank-interruptible on crtc 21, connector 32
  3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
...................................................................................................................................................................................................................................................................................Test assertion failure function run_test_step, file kms_flip.c:907:
Failed assertion: gettime_us() - start < 500
Last errno: 4, Interrupted system call
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [run_test_on_crtc_set.constprop.12+0x1e6a]
  #2 [run_test+0x26a]
  #3 [main+0x42d]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest flip-vs-expired-vblank-interruptible failed.
**** DEBUG ****
Test requirement passed: (flags & TEST_HANG) == 0 || !is_hung(drm_fd)
Test requirement passed: modes
Beginning flip-vs-expired-vblank-interruptible on crtc 21, connector 32
igt_create_fb_with_bo_size(width=3200, height=1800, format=0x34325258 [bpp=32], tiling=0x0, size=0)
igt_create_fb_with_bo_size(handle=2, pitch=12800)
igt_create_fb_with_bo_size(width=3200, height=1800, format=0x34325258 [bpp=32], tiling=0x0, size=0)
igt_create_fb_with_bo_size(handle=3, pitch=12800)
igt_create_fb_with_bo_size(width=3200, height=1800, format=0x34325258 [bpp=32], tiling=0x100000000000001, size=0)
igt_create_fb_with_bo_size(handle=4, pitch=16384)
  3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
Test assertion failure function run_test_step, file kms_flip.c:907:
Failed assertion: gettime_us() - start < 500
Last errno: 4, Interrupted system call
****  END  ****
Subtest flip-vs-expired-vblank-interruptible: FAIL (4.828s)