Hello
After update skypeforlinux to 8.5.76.55323 I've started to get xorg segfaults when connected to 2 external monitors via docking station.
My setup: Dell XPS 13 9360 + Dell DS1000 USB-C docking station + 2 external FullHD Dell monitors.
In xorg logs I can see:

[ 17917.757] (II) LoadModule: "modesetting"
[ 17917.757] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 17917.757] (II) Module modesetting: vendor="X.Org Foundation"
[ 17917.757] compiled for 1.18.4, module version = 1.18.4
[ 17917.757] Module class: X.Org Video Driver
[ 17917.757] ABI class: X.Org Video Driver, version 20.0
[ 17917.757] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 17917.759] (II) modeset(0): using drv /dev/dri/card0
[ 17917.759] (EE)
[ 17917.759] (EE) Backtrace:
[ 17917.759] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e) [0x55c4f0526b6e]
[ 17917.759] (EE) 1: /usr/lib/xorg/Xorg (0x55c4f0374000+0x1b6ef9) [0x55c4f052aef9]
[ 17917.759] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fb6199e2000+0x354b0) [0x7fb619a174b0]
[ 17917.759] (EE) 3: /usr/lib/x86_64-linux-gnu/libpciaccess.so.0 (pci_device_next+0x118) [0x7fb61afd1a38]
[ 17917.759] (EE) 4: /usr/lib/x86_64-linux-gnu/libpciaccess.so.0 (pci_device_find_by_slot+0x3b) [0x7fb61afd1abb]
[ 17917.759] (EE) 5: /usr/lib/x86_64-linux-gnu/libpciaccess.so.0 (pci_device_vgaarb_init+0xaf) [0x7fb61afd37af]
[ 17917.759] (EE) 6: /usr/lib/xorg/Xorg (0x55c4f0374000+0xb1a39) [0x55c4f0425a39]
[ 17917.759] (EE) 7: /usr/lib/xorg/Xorg (xf86BusConfig+0x62) [0x55c4f03fe7a2]
[ 17917.759] (EE) 8: /usr/lib/xorg/Xorg (InitOutput+0x968) [0x55c4f040cd58]
[ 17917.759] (EE) 9: /usr/lib/xorg/Xorg (0x55c4f0374000+0x57be4) [0x55c4f03cbbe4]
[ 17917.759] (EE) 10: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7fb619a02830]
[ 17917.759] (EE) 11: /usr/lib/xorg/Xorg (_start+0x29) [0x55c4f03b6049]
[ 17917.759] (EE)
[ 17917.759] (EE) Segmentation fault at address 0x0
[ 17917.759] (EE)
Fatal server error:
[ 17917.759] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 17917.759] (EE)
[ 17917.759] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
[ 17917.759] (EE) Please also check the log file at "/var/log/Xorg.1.log" for additional information.
[ 17917.759] (EE)
[ 17917.816] (EE) Server terminated with error (1). Closing log file.

I'm not facing this issue when I'm not connected to external monitors.

I'm running 4.10.0-33-generic and

xserver-xorg-core-hwe-16.04 - 1.19.3-1ubuntu1~16.04.2
xserver-xorg-hwe-16.04 - 7.7+16ubuntu3~16.04.1
xserver-xorg-video-vesa-hwe-16.04 - 2.3.4-1build3~16.04.1 

Here's my bug on launchpad (I don't believe I can get any help there because gogle says that libpciaccess.so.0  related segfaults is not something usual)
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1714122

It's my first bug about xorg. So please forgive if I've did anything wrong and sorry for my English. Any help will be much appreciated.