[SeaBIOS] SeaVGABIOS crash on FC13 X11

Kevin O'Connor kevin at koconnor.net
Sun Mar 10 03:19:32 CET 2013


On Sun, Mar 10, 2013 at 02:04:02AM +0000, Julian Pidancet wrote:
> On Sun, Mar 10, 2013 at 1:15 AM, Kevin O'Connor <kevin at koconnor.net> wrote:
> > On Sun, Mar 10, 2013 at 01:09:35AM +0000, Julian Pidancet wrote:
> >> On Sun, Mar 10, 2013 at 12:09 AM, Kevin O'Connor <kevin at koconnor.net> wrote:
> >
> > Yeah - I thought the same thing and looked into that.  The assembler
> > translation is still being performed and I don't see anything that
> > looks suspicious.
> >
> 
> I managed to get set up with qemu and SeaBIOS and I'm seeing
> interesting results:
> First of all, I'm not able to access the Xorg logs, because it looks
> like the VM crashes completely. (Maybe I need to ask Fedora to boot in
> text mode ?)

I've been able to get to the logs by pressing control-alt-2, then
typing "sendkey ctrl-alt-f2" in the qemu console, and then hitting
control-alt-1 to go back to the session (now on the second console).

> It is printing the same sequence of bytes over and over again:
> 
> 0002d160  30 30 33 0d 0a ff 55 aa  48 e9 ed 4e 93 55 aa 48  |003...U.H..N.U.H|
> 0002d170  ec ed 4e 93 55 aa 48 e9  ed 4e 93 55 aa 48 e9 ed  |..N.U.H..N.U.H..|
> 0002d180  4e 93 55 aa 48 e9 ed 4e  93 55 aa 48 e9 ed 4e 93  |N.U.H..N.U.H..N.|
> 0002d190  55 aa 48 e9 ed 4e 93 55  aa 48 e9 ed 4e 93 55 aa  |U.H..N.U.H..N.U.|
> 0002d1a0  48 e9 ed 4e 93 55 aa 48  e9 ed 4e 93 55 aa 48 e9  |H..N.U.H..N.U.H.|

I'm not seeing this right now, but I think I have seen it in previous
tests.  I think subtle changes in the binary layout may make this junk
come out/not come out.

Thanks again for looking at this.

-Kevin



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