[Bug 104072] [GFX] Connecting three monitors one of them lost video signal

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104072

--- Comment #1 from Octavio <octaviox.hernandez.lopez at intel.com> ---
Tests steps:

Plug two external monitors, one of the is not displaying video signal 
unplug the second one, it turns on the first monitor, plug again the monitor
don't reproduce video signal

======================================
        Graphic stack
======================================

======================================
             Software
======================================
kernel version              : 4.14.0-drm-tip-ww47-commit-f710441+
hostname                    : KBL-01
architecture                : x86_64
os version                  : Ubuntu 17.04
os codename                 : zesty
kernel driver               : i915
bios revision               : 1.46
bios release date           : 09/20/2016
ksc                         : 1.36
hardware acceleration       : enabled
swap partition              : enabled on (/dev/sda2)

======================================
        Graphic drivers
======================================
mesa                        : 17.4.0-devel (git-ce221cbbcf
modesetting                 : enabled
modesetting compiled for    : 1.19.99.1 X.Org Video Driver
libdrm                      : 2.4.88
vaapi (intel-driver)        : Intel i965 driver for Intel(R) Sandybridge Mobile
- 2.0.1.pre1 (2.0.0.pre2-11-g35fc70f)
cairo                       : 1.15.9
intel-gpu-tools (tag)       : intel-gpu-tools-1.20-117-gf8f6db9c
intel-gpu-tools (commit)    : f8f6db9c

======================================
             Hardware
======================================
motherboard model          : 4243G52
motherboard id             : 4243G52
form factor                : Notebook
manufacturer               : LENOVO
cpu family                 : Core i5
cpu family id              : 6
cpu information            : Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz
gpu card                   : Intel Corporation 2nd Generation Core Processor
Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
memory ram                 : 3.74 GB
max memory ram             : 16 GB
display resolution         : 1920x1080
cpu thread                 : 4
cpu core                   : 2
cpu model                  : 42
cpu stepping               : 7
socket                     : ZIF Socket
signature                  : Type 0, Family 6, Model 42, Stepping 7
hard drive                 : 447GiB (480GB)
current cd clock frequency : 400000 kHz
maximum cd clock frequency : 400000 kHz
displays connected         : LVDS-1

======================================
             Firmware
======================================

======================================
             kernel parameters
======================================
quiet splash drm.debug=0xe resume=/dev/sda2

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