> I'm trying to boot an Acer AS3810T-6827
> from USB flash.  I get the GRUB menu and the
> Solaris banner, followed by:
> 
> WARNING: Mobile 4 Series chipset present, activating quirks
> 
> WARNING: Setting RWBF forcefully
> 
> It hangs at that point.

A Toshiba Tecra A10 reports the same warnings
at boot time, but doesn't hang.  So these warnings
seem to be harmless.

Most likely it hangs after loading one of the drivers,
after these warnings have been reported.

Try a verbose kernel boot with option "-v" to get
some more information what drivers are loaded
and where it hang.

Or boot the kernel with options "-kdv" and
in kmdb use:

    moddebug/W 80000000
    :c

(see http://blogs.sun.com/dmick/entry/diagnosing_kernel_hangs_panics_with )
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