id summary reporter owner description type status component version resolution keywords cc guest host 5756 VirtualBox guest freezes while starting at 0% if serial ports are enabled => Fixed in SVN Mike "Running VirtualBox 3.1.0 r55467 on Ubuntu 9.10 (non-OSE) installed via apt from the virtualbox.org apt repository. VM guest OS is Windows XP. I was running the OSE in the Ubuntu repositories before, but found I would require USB support since virtualbox only supports 2 serial ports at a time. Now, when starting my VM, if BOTH serial ports are enabled, the VM freezes at 0% while ""Starting virtual machine..."" My serial settings are: Port 1 Enabled COM1 Host Device /dev/ttyS0 Port 2 Enabled COM2 Host Device /dev/ttyS1 It freezes up with any settings for the second serial device. I have verified that nothing is using the serial ports, and that they function from the host machine." defect closed uart VirtualBox 3.1.0 fixed serial freeze startup other Linux