﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
14659	Emulated COM1 IRQ reported as 0 to hosts on VBox 5.0.6	Peter Palúch		"Greetings,

I am running Debian Jessie (AMD64) on my host machines. After upgrading to VirtualBox 5.0.6, my guest OSes started reporting the IRQ of the emulated serial port 1 (COM1 / ttyS0) as 0, see attached screenshots. As a result, Windows hosts are unable to use the serial port - they claim an error that ""the device cannot start (code 10)"". Linux guests are more lenient and while they also report the IRQ of the serial port 1 to be 0, they nonetheless appear to be able to use it.

Reverting back to VBox 5.0.4 solves the problem entirely, so this appears to be a regression in the 5.0.6 release. I have been able to reproduce this problem reliably on 19 machines (I have discovered it after upgrading an entire classroom ;) ).

Thanks for looking into this issue!

Best regards,
Peter"	defect	closed	uart	VirtualBox 5.0.6	fixed			all	Linux
