I realized that grub_ofconsole_cls() wasn't working at all on my G3
with video console. With a little bit of experimentation on that and
serial console on the briQ, I've determined that using *both* the ANSI
escape sequence and a literal ^L seems to work. Please let me know if
you see odd video artifacts after this (that includes Sparc, since
Sparc shares this driver).
I've also cleared the screen after resuming GRUB from the "suspend"
command, since GRUB has no idea what OF might have output, and so no
idea what the current curson position should be.
-Hollis
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