[openfirmware] Troubleshooting VGA under qemu? [patch]

James Cameron quozl at laptop.org
Thu Oct 22 03:10:26 CEST 2015


On Fri, Oct 02, 2015 at 10:37:03PM +0000, Marcin Cieslak wrote:
> On Sat, 3 Oct 2015, James Cameron wrote:
> 
> > > Can you show me your .properties of the vmware display?
> > 
> > assigned-addresses       81001010 00000000 00008010 00000000 00000010 
> >                          82001014 00000000 10000000 00000000 01000000 
> >                          82001018 00000000 11000000 00000000 00010000 
> > reg                      00001000 00000000 00000000 00000000 00000000 
> >                          01001010 00000000 00000000 00000000 00000010 
> >                          02001014 00000000 00000000 00000000 01000000 
> >                          02001018 00000000 00000000 00000000 00010000 
> 
> This is all fine, your resources got allocated.
> 
> As far as I understand we communicate with vmware VGA via the fifo area
> (the 02001018 resource, 0x10000 bytes) 
> and maybe this fails somehow (overflows, wraps-around, whatever?)
> 
> > -vga cirrus ... works fine, does not reproduce problem.
> > 
> > -vga std ... does not work, with -serial $(tty) can interact with qemu
> >  window as input, terminal as output.
> 
> Can you step over the initalization?

Didn't get time to work on this, sorry.

Committed r3785.

-- 
James Cameron
http://quozl.linux.org.au/



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