Hi, I think, that i have found real source of this bug, but not in Debian.
https://www.virtualbox.org/ticket/9380Did some tests, and found that slowness is only in one direction (virtual->real).
Unplugged cable was coincidence. This bug should be closed. Gasha -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org