xorg failed to run

[spermwhale_warrior]

Here is the report. I use the latest modular-xorg from the binaries. How could I know the package an executable like ' X ' does belong to ? And ask the details of an already installed package ?
Here is /var/Xorg.0.log : https://drive.google.com/file/d/0B-_...it?usp=sharing

1 X.Org X Server 1.10.3
2 Release Date: 2011-07-08
3 X Protocol Version 11, Revision 0
4 Build Operating System: NetBSD/amd64 -
5 Current Operating System: NetBSD saada.mehdi 6.1.4 NetBSD 6.1.4 (GENERIC) amd64
6 Build Date: 01 August 2011 01:01:00AM

7 Current version of pixman: 0.23.2
8 Before reporting problems, check http://wiki.X.Org
9 to make sure that you have the latest version.
10 Markers: (--) probed, (**) from config file, (==) default setting,
11 (++) from command line, (!!) notice, (II) informational,
12 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
13 ==) Log file: "/var/log/Xorg.0.log", Time: Wed Aug 27 23:57:42 2014
14 (==) Using default built-in configuration (12 lines)
15 Using rom_base = 0xc0000 0x10000 (pci_rom=0)
16 (EE) AIGLX error: i915 does not export required DRI extension
17 (EE) AIGLX: reverting to software rendering
18 [mi] EQ overflowing. The server is probably stuck in an infinite loop.