Thinkpad T440s cannot connect to displayport

Question

Hi, I just installed arch on a Thinkpad T440s and I've managed to configure most things to my liking, but for some reason I cannot recognize displays plugged into the mini displayport. No matter what I have plugged in, the output of
$ xrandr -q
is always:
Screen 0: minimum 8 x 8, current 1600 x 900, maximum 32767 x 32767
eDP1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
1600x900 60.01*+
1024x768 60.00
800x600 60.32 56.25
640x480 59.94
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
This also doesn't show the VGA port at all, which confuses me. I have the latest version of the xf86-video-intel driver installed. I also tried forcing output to DP1 with:
$ xrandr --addmode DP1 1600x900
$ xrandr --output DP1 --mode 1600x900
but this failed with output
xrandr: Configure crtc 1 failed
Any help would be greatly appreciated!

Answer 1

Hi proglodyte,
Sorry to hear the mini Displayport is still problematic. Requested info is below, though its vanilla defaults (i.e., no xorg.conf). Hope its helpful anyway.
cat /etc/mkinitcpio.conf
# vim:set ft=sh
# MODULES
# The following modules are loaded before any boot hooks are
# run. Advanced users may wish to specify all system modules
# in this array. For instance:
# MODULES="piix ide_disk reiserfs"
MODULES=""
# BINARIES
# This setting includes any additional binaries a given user may
# wish into the CPIO image. This is run last, so it may be used to
# override the actual binaries included by a given hook
# BINARIES are dependency parsed, so you may safely ignore libraries
BINARIES=""
# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in any way. This is useful for config files.
FILES=""
# HOOKS
# This is the most important setting in this file. The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added. Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
## This setup specifies all modules in the MODULES setting above.
## No raid, lvm2, or encrypted root is needed.
# HOOKS="base"
## This setup will autodetect all modules for your system and should
## work as a sane default
# HOOKS="base udev autodetect block filesystems"
## This setup will generate a 'full' image which supports most systems.
## No autodetection is done.
# HOOKS="base udev block filesystems"
## This setup assembles a pata mdadm array with an encrypted root FS.
## Note: See 'mkinitcpio -H mdadm' for more information on raid devices.
# HOOKS="base udev block mdadm encrypt filesystems"
## This setup loads an lvm2 volume group on a usb device.
# HOOKS="base udev block lvm2 filesystems"
## NOTE: If you have /usr on a separate partition, you MUST include the
# usr, fsck and shutdown hooks.
HOOKS="base udev autodetect modconf block filesystems keyboard fsck"
# COMPRESSION
# Use this to compress the initramfs image. By default, gzip compression
# is used. Use 'cat' to create an uncompressed image.
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"
# COMPRESSION_OPTIONS
# Additional options for the compressor
#COMPRESSION_OPTIONS=""
ls -R /etc/X11
/etc/X11/:
xinit xorg.conf.d
/etc/X11/xinit:
xinitrc xinitrc.d xserverrc
/etc/X11/xinit/xinitrc.d:
30-dbus
/etc/X11/xorg.conf.d:
90-evdev-trackpoint.conf
pacman -Qs intel
local/intel-dri 10.2.6-1
Mesa drivers for Intel
local/intel-ucode 20140624-1
Microcode update files for Intel CPUs
local/libva-intel-driver 1.3.2-1
VA-API implementation for Intel G45 and HD Graphics family
local/xf86-video-intel 2.99.914-4 (xorg-drivers xorg)
X.org Intel i810/i830/i915/945G/G965+ video drivers
Other things to consider are a faulty mini Displayport adaptor (best case) or mini Displayport itself (worst case) on your T440S.