radeonkms console is grayscale

[Andrew Daugherity]

Thanks for the tip Jean-Sébastien — I didn’t see any mention of bit depth in vt(4), only resolution, but setting the depth that way does indeed work.

In 16 bpp, everything looks correct, although it does scroll a bit slower than 8 bpp.  In 24 bpp it is in color, but the colors are all wrong.  Photos: http://imgur.com/a/fbLmz

Not sure why 8 bpp is grayscale, since 4-bit VGA is in color; ideally this would get fixed, since 8 bpp is faster than 16 bpp, but I do at least have a workaround.  FWIW Linux on similar hardware chooses 1024x768x16, which displays correctly.  I haven’t tried alternate modes in Linux but could if that would help debugging.

-Andrew