Chrome Version       : Chromium 53.0.2785.143 Built on Ubuntu , running on Ubuntu 16.04, Google Chrome 54.0.2840.71
URLs (if applicable) : 
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari: NA
    Firefox:Ok
         IE: NA

What steps will reproduce the problem?
(1) connect external monitors
(2) run display setupscript
 #!/bin/bash
xrandr --output HDMI1 --off
xrandr --output DP1 --off
xrandr --output HDMI1 --auto --rotate left --scale 2x2 --pos 0x0
xrandr --output eDP1 --mode 3840x2160 --rate 60 --pos 2160x2160
xrandr --output DP1 --mode 1920x1080 --rate 60 --scale 2x2 --pos 6000x0
(3) launch chromium / chrome

What is the expected result?
broswer launches

What happens instead?
entire xorg crashes

Please provide any additional information below. Attach a screenshot if
possible.
xorg crashes also if you try to launch the browswer when already connected to the monitors.

os: ubuntu 16.04 4.4.0-45-generic
desktop environment: xfce, window manager i3

system specs:

H/W path         Device           Class          Description
============================================================
                                  system         Dell Precision M3800 (Dell Precision M3800)
/0                                bus            Dell Precision M3800
/0/0                              memory         64KiB BIOS
/0/2f                             processor      Intel(R) Core(TM) i7-4712HQ CPU @ 2.30GHz
/0/2f/4                           memory         256KiB L1 cache
/0/2f/5                           memory         1MiB L2 cache
/0/2f/6                           memory         6MiB L3 cache
/0/7                              memory         16GiB System Memory
/0/7/0                            memory         8GiB SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
/0/7/1                            memory         8GiB SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
/0/100                            bridge         Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller
/0/100/1                          bridge         Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 C
/0/100/1/0                        generic        Illegal Vendor ID
/0/100/2                          display        4th Gen Core Processor Integrated Graphics Controller
/0/100/3                          multimedia     Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controll
/0/100/4                          generic        Intel Corporation
/0/100/14                         bus            8 Series/C220 Series Chipset Family USB xHCI
/0/100/14/0      usb4             bus            xHCI Host Controller
/0/100/14/0/2                     generic        USB 10/100/1000 LAN
/0/100/14/1      usb3             bus            xHCI Host Controller
/0/100/14/1/4                     bus            USB2.0 Hub
/0/100/14/1/4/1                   input          USB Keyboard
/0/100/14/1/4/2                   input          Dell MS116 USB Optical Mouse
/0/100/14/1/6                     input          Touchscreen
/0/100/14/1/9                     communication  Bluetooth wireless interface
/0/100/14/1/b                     multimedia     Integrated_Webcam_HD
/0/100/16                         communication  8 Series/C220 Series Chipset Family MEI Controller #1
/0/100/1a                         bus            8 Series/C220 Series Chipset Family USB EHCI #2
/0/100/1a/1      usb1             bus            EHCI Host Controller
/0/100/1a/1/1                     bus            USB hub
/0/100/1b                         multimedia     8 Series/C220 Series Chipset High Definition Audio Contr
/0/100/1c                         bridge         8 Series/C220 Series Chipset Family PCI Express Root Por
/0/100/1c.2                       bridge         8 Series/C220 Series Chipset Family PCI Express Root Por
/0/100/1c.2/0    wlp6s0           network        Wireless 7260
/0/100/1c.3                       bridge         8 Series/C220 Series Chipset Family PCI Express Root Por
/0/100/1c.3/0                     generic        RTS5249 PCI Express Card Reader
/0/100/1c.4                       bridge         8 Series/C220 Series Chipset Family PCI Express Root Por
/0/100/1d                         bus            8 Series/C220 Series Chipset Family USB EHCI #1
/0/100/1d/1      usb2             bus            EHCI Host Controller
/0/100/1d/1/1                     bus            USB hub
/0/100/1f                         bridge         HM87 Express LPC Controller
/0/100/1f.2                       storage        8 Series/C220 Series Chipset Family 6-port SATA Controll
/0/100/1f.3                       bus            8 Series/C220 Series Chipset Family SMBus Controller
/0/100/1f.6                       generic        8 Series Chipset Family Thermal Management Controller
/0/1             scsi1            storage        
/0/1/0.0.0       /dev/sda         disk           256GB SanDisk X110 MSA
/0/1/0.0.0/1     /dev/sda1        volume         222GiB EXT4 volume
/0/1/0.0.0/2     /dev/sda2        volume         15GiB Extended partition
/0/1/0.0.0/2/5   /dev/sda5        volume         15GiB Linux swap / Solaris partition
/1                                power          DELL Y758W53
/2               veth77ad184      network        Ethernet interface
/3               enx9cebe82176da  network        Ethernet interface