On Sat, 19 Sep 2009, Joel Holdsworth wrote: [...]
16-bit works fine - X renders the icons in true color then downsamples. greyscale/monochrome will be similar, not that the end result would be pretty. A more realistic case is 8-bit, and the only way I can think to set that up is with ssh+X11 in cygwin in a WinXP VM with the screen depth set to 8-bit, but wine doesn't even start in this case due to missing extensions, so I assume it's not supported.
The right way to test paletted 8bpp is probably to use vncserver. Something like that should do it:
vncserver -depth 8 -cc 3
I tested Wine in paletted mode years ago and it worked at the time.