[Bug 102563] New: [IGT][KBL] gem_exec_nop at headless is falling Failed, assertion: (n_headless) <= (1.0 + 0.1f) * n_display && (n_headless) >= (1.0 - 0.1f) * n_display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102563

            Bug ID: 102563
           Summary: [IGT][KBL] gem_exec_nop at headless is falling Failed,
                    assertion: (n_headless) <= (1.0 + 0.1f) * n_display &&
                    (n_headless) >= (1.0 - 0.1f) * n_display
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: armando.antoniox.mora.reos at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 134001
  --> https://bugs.freedesktop.org/attachment.cgi?id=134001&action=edit
dmesg log

The following test case is falling on KBL with latest configuration

=======================================
Test list
=======================================
igt at gem_exec_nop@headless


======================================
             Software
======================================
kernel version              : 4.13.0-drm-tip-ww36-commit-59fbfaa+
hostname                    : gfx-desktop
architecture                : x86_64
os version                  : Ubuntu 16.10
os codename                 : yakkety
kernel driver               : i915
bios revision               : 5.12
bios release date           : 09/12/2016
hardware acceleration       : disabled
swap partition              : enabled on (/dev/sda3)

======================================
        Graphic drivers
======================================
grep: /opt/X11R7/var/log/Xorg.0.log: No such file or directory
libdrm                      : 2.4.83
cairo                       : 1.15.9
intel-gpu-tools (tag)       : intel-gpu-tools-1.19-234-g490b386
intel-gpu-tools (commit)    : 490b386

======================================
             Hardware
======================================
platform                   : Kabylake-Nuc
motherboard model          : MS-B142
motherboard id             : MS-B1421
form factor                : Desktop
manufacturer               : Micro-StarInternationalCo.,Ltd.
cpu family                 : Core i7
cpu family id              : 6
cpu information            : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
gpu card                   : Intel Corporation Device 5916 (rev 02) (prog-if 00
[VGA controller])
memory ram                 : 15.55 GB
max memory ram             : 64 GB
cpu thread                 : 4
cpu core                   : 2
cpu model                  : 142
cpu stepping               : 9
socket                     : Other
signature                  : Type 0, Family 6, Model 142, Stepping 9
hard drive                 : 111GiB (120GB)
current cd clock frequency : 337500 kHz
maximum cd clock frequency : 675000 kHz
displays connected         : DP-1 HDMI-A-2

======================================
             Firmware
======================================
dmc fw loaded             : yes
dmc version               : 1.1
guc fw loaded             : SUCCESS
guc version wanted        : 9.14
guc version found         : 9.14
huc fw loaded             : yes

======================================
             kernel parameters
======================================
drm.debug=0x1e quiet splash i915.enable_guc_submission=2
i915.enable_guc_loading=2 i915.alpha_support=1

============================================
output sample
============================================
(gem_exec_nop:1434) INFO: Without a display connected (headless): 10.19us
(gem_exec_nop:1434) CRITICAL: Test assertion failure function headless, file
gem_exec_nop.c:185:
(gem_exec_nop:1434) CRITICAL: Failed assertion: (n_headless) <= (1.0 + 0.1f) *
n_display && (n_headless) >= (1.0 - 0.1f) * n_display
(gem_exec_nop:1434) CRITICAL: 'n_headless' != 'n_display' (0.000010 not within
10.000000% tolerance of 0.000003)
(gem_exec_nop:1434) igt-core-INFO: Stack trace:
(gem_exec_nop:1434) igt-core-INFO:   #0 [__igt_fail_assert+0x101]
(gem_exec_nop:1434) igt-core-INFO:   #1 [__real_main614+0x78d]
(gem_exec_nop:1434) igt-core-INFO:   #2 [__libc_csu_init+0x0]
****  END  ****
Subtest headless: FAIL (10.546s)

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