id summary reporter owner description type status component version resolution keywords cc guest host 12161 EFI boot very slow with Serial Port enabled => fixed in SVN/next maintenance AxelFontaine "When booting a VM using EFI with a serial port mapped to a file, the VM spends more than 10 seconds in EFI before booting the kernel. During this time a lot of output is written to the serial port file. With the serial port disabled, the same VM boots the kernel after less than 1 second." defect closed EFI VirtualBox 4.2.18 fixed Linux Windows