I forgot to include an improtant detail, I'm using QEMU 1.6.0 in a Windows 8.1 PC.
You can tell by the syslog but any way I think that QEMU emulates a cirrus video card. I don't have any important information in this virual machine, this is just a test, so I can make any test that its needed to solve this or any other bug. Thanks for the great Debian operating system!
