I built 32-bit GENERIC_SUN4U kernel + 32-bit userland from current 
source tree. When booting kernel, white console with black foreground 
text is obscured by a small black window with white foreground text, 
where the rest of kernel message begin appearing. In particular I notice 
the following message:

Setting tty flags.
sys_ioctl: _IOW('t', 92, 4) returned -1: pid=87 comm=ttyflags

When it gets to the login promt, the keyboard does not seem to work at all.

Any ideas? Or current for sparc64 is not quite ready for general use?