/usr/share/gnome-session/hardware-compatibility is in gnome-session-bin 3.18.1.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | ##
## This file contains a list of blacklist/whitelist regular expressions for
## renderer strings.
##
## The regular expressions are case-insensitive POSIX Extended Regular
## Expressions. See regex(7) for details.
##
## Syntax:
## - Comment lines start with '#'
## - Lines starting with '+' are whitelisting.
## - Lines starting with '-' are blacklisting.
## - Lines not starting with '#', '+', '-' are ignored.
##
# Intel 830-865
-Intel\(R\) 8[[:digit:]]{2,2}[^[:digit:]]
# Intel IGD
-Intel IGD
# Pre-R300 radeon
-Mesa DRI R[12]00[^[:digit:]]
-Mesa DRI R[12]00$
# Old Mesa software GL renderer
-software rasterizer
# Gallium has softpipe; we explicitly enable llvmpipe
-softpipe
# nouveau vieux NV25 doesn't work too well
-Mesa DRI nv25
|