on a fresh Arch Linux installation i had difficulties with the graphics drivers. In the process i have installed a lot of different drivers to somehow get the display working. Now i need to determine which driver X is using. How to do that?The installed packages include xf86-video-intel, xf86-video-nouveau, nvidia, xorg-drivers. To solve a strange issue to launch any graphical desktop manager i had to replace nividia-libgl with mesa-libgl.Graphics: Intel HD Graphics 4000 / Nvidia GT 750MThe content of Xorg.0.log is: http://pastebin.com/YwiMZmG6Thanks in advance :)
Determine which graphics driver Xorg uses
xorg;drivers;graphics
You can check the Xorg startup log file, usually /var/log/Xorg.0.log and look at which modules it is loading.  By default Xorg can try to autodetect but you can manually force a driver by putting a Device stanza in an Xorg conf file.  Here is what the Xorg startup log will look like for an nvidia card and the nvidia proprietary driver.[  3702.470] (II) xfree86: Adding drm device (/dev/dri/card0)[  3702.472] (--) PCI:*(0:3:0:0) 10de:1184:3842:3774 rev 161, Mem @ 0xfa000000/16777216, 0xd8000000/134217728, 0xd6000000/33554432, I/O @ 0x0000cc00/128, BIOS @ 0x????????/524288[  3702.472] (II) LoadModule: glx[  3702.473] (II) Loading /usr/lib64/opengl/nvidia/extensions/libglx.so[  3702.476] (II) Module glx: vendor=NVIDIA Corporation[  3702.476]    compiled for 4.0.2, module version = 1.0.0[  3702.476]    Module class: X.Org Server Extension[  3702.476] (II) NVIDIA GLX Module  355.11  Wed Aug 26 16:02:11 PDT 2015[  3702.476] (II) LoadModule: nvidia[  3702.476] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so[  3702.476] (II) Module nvidia: vendor=NVIDIA Corporation[  3702.476]    compiled for 4.0.2, module version = 1.0.0[  3702.476]    Module class: X.Org Video Driver[  3702.476] (II) NVIDIA dlloader X Driver  355.11  Wed Aug 26 15:38:55 PDT 2015[  3702.476] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs[  3702.476] (++) using VT number 7