-> cat /var/log/Xorg.0.log
[    83.388]
X.Org X Server 1.17.1
Release Date: 2015-02-10
[    83.392] X Protocol Version 11, Revision 0
[    83.393] Build Operating System: Linux 3.19.2-1-ARCH i686
[    83.395] Current Operating System: Linux archpc 3.19.3-3-ARCH #1 SMP PREEMPT Wed Apr 8 14:24:22 CEST 2015 i686
[    83.395] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=08f32a0c-efb9-420c-84b2-4bcfc91e5943 rw quiet
[    83.398] Build Date: 14 April 2015  10:36:09AM
[    83.400]
[    83.402] Current version of pixman: 0.32.6
[    83.405]    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
[    83.405] Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    83.412] (==) Log file: "/var/log/Xorg.0.log", Time: Sun Apr 19 00:09:50 2015
[    83.414] (==) Using config directory: "/etc/X11/xorg.conf.d"
[    83.415] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    83.416] (==) No Layout section.  Using the first Screen section.
[    83.416] (**) |-->Screen "Screen0" (0)
[    83.416] (**) |   |-->Monitor "Monitor0"
[    83.417] (==) No device specified for screen "Screen0".
    Using the first device section listed.
[    83.417] (**) |   |-->Device "Nvidia card"
[    83.417] (==) Automatically adding devices
[    83.417] (==) Automatically enabling devices
[    83.417] (==) Automatically adding GPU devices
[    83.417] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/OTF/".
[    83.417]    Entry deleted from font path.
[    83.417]    (Run 'mkfontdir' on "/usr/share/fonts/OTF/").
[    83.417] (WW) The directory "/usr/share/fonts/Type1/" does not exist.
[    83.417]    Entry deleted from font path.
[    83.417] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/100dpi/".
[    83.417]    Entry deleted from font path.
[    83.417]    (Run 'mkfontdir' on "/usr/share/fonts/100dpi/").
[    83.418] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/75dpi/".
[    83.418]    Entry deleted from font path.
[    83.418]    (Run 'mkfontdir' on "/usr/share/fonts/75dpi/").
[    83.418] (==) FontPath set to:
    /usr/share/fonts/misc/,
    /usr/share/fonts/TTF/
[    83.418] (==) ModulePath set to "/usr/lib/xorg/modules"
[    83.418] (II) The server relies on udev to provide the list of input devices.
    If no devices become available, reconfigure udev or disable AutoAddDevices.
[    83.418] (II) Loader magic: 0x829e700
[    83.418] (II) Module ABI versions:
[    83.418]    X.Org ANSI C Emulation: 0.4
[    83.418]    X.Org Video Driver: 19.0
[    83.418]    X.Org XInput driver : 21.0
[    83.418]    X.Org Server Extension : 9.0
[    83.428] (II) systemd-logind: took control of session /org/freedesktop/login1/session/c2
[    83.429] (II) xfree86: Adding drm device (/dev/dri/card0)
[    83.431] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 8 paused 0
[    83.435] (--) PCI:*(0:1:0:0) 10de:0221:0000:0000 rev 161, Mem @ 0xe0000000/16777216, 0xd0000000/268435456, 0xe1000000/16777216, BIOS @ 0x????????/131072
[    83.436] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[    83.436] (II) LoadModule: "glx"
[    83.437] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[    83.448] (II) Module glx: vendor="X.Org Foundation"
[    83.448]    compiled for 1.17.1, module version = 1.0.0
[    83.448]    ABI class: X.Org Server Extension, version 9.0
[    83.449] (==) AIGLX enabled
[    83.449] (II) LoadModule: "nouveau"
[    83.449] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
[    83.451] (II) Module nouveau: vendor="X.Org Foundation"
[    83.451]    compiled for 1.17.0, module version = 1.0.11
[    83.451]    Module class: X.Org Video Driver
[    83.451]    ABI class: X.Org Video Driver, version 19.0
[    83.451] (II) NOUVEAU driver
[    83.451] (II) NOUVEAU driver for NVIDIA chipset families :
[    83.451]    RIVA TNT        (NV04)
[    83.451]    RIVA TNT2       (NV05)
[    83.451]    GeForce 256     (NV10)
[    83.451]    GeForce 2       (NV11, NV15)
[    83.451]    GeForce 4MX     (NV17, NV18)
[    83.452]    GeForce 3       (NV20)
[    83.452]    GeForce 4Ti     (NV25, NV28)
[    83.452]    GeForce FX      (NV3x)
[    83.452]    GeForce 6       (NV4x)
[    83.452]    GeForce 7       (G7x)
[    83.452]    GeForce 8       (G8x)
[    83.452]    GeForce GTX 200 (NVA0)
[    83.452]    GeForce GTX 400 (NVC0)
[    83.452] (--) using VT number 3

[    83.459] (II) [drm] nouveau interface version: 1.2.1
[    83.459] (II) Loading sub module "dri2"
[    83.459] (II) LoadModule: "dri2"
[    83.460] (II) Module "dri2" already built-in
[    83.460] (EE) NOUVEAU(0): [drm] failed to set drm interface version.
[    83.460] (EE) NOUVEAU(0): [drm] error opening the drm
[    83.460] (EE) NOUVEAU(0): 892:
[    83.460] (II) UnloadModule: "nouveau"
[    83.460] (EE) Screen(s) found, but none have a usable configuration.
[    83.460] (EE)
Fatal server error:
[    83.460] (EE) no screens found(EE)
[    83.461] (EE)
Please consult the The X.Org Foundation support
     at http://wiki.x.org
 for help.
[    83.461] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[    83.461] (EE)
[    83.538] (EE) Server terminated with error (1). Closing log file.