I try to keep my VM setup minimal so my extensions don't pull in things I don't want when I compile them. My desktop is flwm, and I'm using Xorg 3d. I don't know if this helps or not:
tc@box:~$ xdpyinfo
name of display: :0.0
version number: 11.0
vendor string: The X.Org Foundation
vendor release number: 12006000
X.Org version: 1.20.6
maximum request size: 16777212 bytes
motion buffer size: 256
bitmap unit, bit order, padding: 32, LSBFirst, 32
image byte order: LSBFirst
number of supported pixmap formats: 7
supported pixmap formats:
depth 1, bits_per_pixel 1, scanline_pad 32
depth 4, bits_per_pixel 8, scanline_pad 32
depth 8, bits_per_pixel 8, scanline_pad 32
depth 15, bits_per_pixel 16, scanline_pad 32
depth 16, bits_per_pixel 16, scanline_pad 32
depth 24, bits_per_pixel 32, scanline_pad 32
depth 32, bits_per_pixel 32, scanline_pad 32
keycode range: minimum 8, maximum 255
focus: window 0x1200006, revert to PointerRoot
number of extensions: 28
BIG-REQUESTS
Composite
DAMAGE
DOUBLE-BUFFER
DPMS
DRI2
DRI3
GLX
Generic Event Extension
MIT-SCREEN-SAVER
MIT-SHM
Present
RANDR
RECORD
RENDER
SHAPE
SYNC
VMWARE_CTRL
X-Resource
XC-MISC
XFIXES
XFree86-DGA
XFree86-VidModeExtension
XINERAMA
XInputExtension
XKEYBOARD
XTEST
XVideo
default screen number: 0
number of screens: 1
screen #0:
dimensions: 1918x998 pixels (507x264 millimeters)
resolution: 96x96 dots per inch
depths (7): 24, 1, 4, 8, 15, 16, 32
root window id: 0x405
depth of root window: 24 planes
number of colormaps: minimum 1, maximum 1
default colormap: 0x20
default number of colormap cells: 256
preallocated pixels: black 0, white 16777215
options: backing-store WHEN MAPPED, save-unders NO
largest cursor: 64x64
current input event mask: 0xda403f
KeyPressMask KeyReleaseMask ButtonPressMask
ButtonReleaseMask EnterWindowMask LeaveWindowMask
KeymapStateMask StructureNotifyMask SubstructureNotifyMask
SubstructureRedirectMask PropertyChangeMask ColormapChangeMask
number of visuals: 408
default visual id: 0x21
visual:
visual id: 0x21
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
{rest snipped}
tc@box:~$ cat .Xdefaults
fltk*scheme: gtk+
Xft.dpi: 96.0
Xft.autohint: 0
Xft.lcdfilter: lcddefault
Xft.hintstyle: hintslight
Xft.hinting: 1
Xft.antialias: 1
Xft.rgba: rgb
URxvt*scrollBar: true
URxvt*transparent: true
URxvt*title: Terminal
URxvt*foreground: white
URxvt*background: black
#URxvt*font: xft:DejaVu Sans Mono:style=Book:size=10
URxvt*font: xft:Hack:style=Regular:size=10
#URxvt*font: xft:Unifont:style=Regular:size=12
#URxvt*font: xft:Noto Sans Disp Blk:style=Regular:size=10
#URxvt*font: xft:Terminus:style=Regular:size=20
URxvt*cursorColor: green
URxvt*fading: 20
URxvt*shading: 50
URxvt*color12: DodgerBlue1
URxvt*saveLines: 1000
URxvt*letterSpace: 0
URxvt*iso14755: 1
You can see I have tried a few fonts. I'm using Hack for now. If you think of something else that might be helpful let me know.