[SeaBIOS] [BUG] Windows 7 fails to start with new vgabios binaries

[Gerd Hoffmann]

On Mo, 2013-12-09 at 14:18 +0200, Gal Hammer wrote:
> A Windows 7 (32-bit) VM running with QXL device fails to start with the 
> new updated vgabios binaries (commit 
> 6eefccc0bb9c34051b1e21880fc3a1c1c8686edd).
> 
> qemu's command line:
> 
> /usr/bin/qemu-kvm -m 1G -smp 1 -enable-kvm -usb -device usb-tablet \
>   -device ide-drive,drive=drive-virtio0-0-0,id=virtio0-0-0,bootindex=1 \
>   -drive 
> file=win7_32.qcow2,if=none,id=drive-virtio0-0-0,format=qcow2,werror=stop,rerror=stop,cache=none 
> \
>   -monitor stdio \
>   -vga qxl -spice id=on,disable-ticketing,port=5903

[ full quote, adding seabios to Cc ]

Tracked down to the new vgabios stack switching.  With
CONFIG_VGA_ALLOCATE_EXTRA_STACK=n everything is fine again.

cheers,
  Gerd