[Bug 85906] [BSW]igt/kms_setmode sporadically causes *ERROR* CPU pipe C FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85906

--- Comment #5 from Rami <ramix.ben.hassine at intel.com> ---
Reproduced on BSW with 4.3.0-rc2-drm-intel-nightly+

Hardware:
=========

Platform: Braswell M 
CPU : Intel(R) Celeron N3060 1.60GHz @ 1.6 GHz (family: 6, model: 76 stepping:
4)
SoC : BSW D0
QDF : K6XC
CRB : BRASWELL RVP Fab2
Mandatory Reworks : All 
Feature Reworks: F28, F32,F33 & F37
Optional reworks : O-01a


Software :
Linux distribution: Ubuntu 14.04 LTS 64 bits 
BIOS : BRAS.X64.B084.R00.1508310642
TXE FW : 2.0.0.2073
Ksc : 1.08

kernel 4.3.0-rc2-drm-intel-nightly+
commit 794e1cdfb84be003dbd287c69501c98ec280a89b
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Mon Sep 28 17:28:29 2015 +0300

    drm-intel-nightly: 2015y-09m-28d-14h-28m-11s UTC integration manifest

cairo: (HEAD, tag: 1.14.2) 93422b3cb5e0ef8104b8194c8873124ce2f5ea2d from
git://git.freedesktop.org/git/cairo
drm: (HEAD, tag: libdrm-2.4.64, tag: 2.4.64)
ab2fadabde3829b1ec56bd4756165dd9bd281488 from
git://git.freedesktop.org/git/mesa/drm
intel-driver: (HEAD, origin/master, origin/HEAD, master)
2a72f99d24714f2a58f400ef63b913d4cf9080b3 from
git://git.freedesktop.org/git/vaapi/intel-driver
libva: (HEAD, tag: libva-1.6.1, origin/v1.6-branch)
613eb962b45fbbd1526d751e88e0d8897af6c0e0 from
git://git.freedesktop.org/git/vaapi/libva
mesa: (HEAD, tag: mesa-10.6.7) 32efdc87cbf89cfe08ad9571cd756e27c803caa8 from
git://git.freedesktop.org/git/mesa/mesa
xf86-video-intel: (HEAD, origin/master, origin/HEAD, master)
f0fd4d500de03c30c7ce19915f85acadd1ca4e5d from
git://git.freedesktop.org/git/xorg/driver/xf86-video-intel
xserver: (HEAD, tag: xorg-server-1.17.2)
2123f7682d522619f101b05fb75efa75dabbe371 from
git://git.freedesktop.org/git/xorg/xserver

intel-gpu-tools: (HEAD, tag: intel-gpu-tools-1.12)
1f9e0550455be4b219954a026407dd23ec21b299 from
git://git.freedesktop.org/git/xorg/app/intel-gpu-tools

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