Looks like this should work nowadays (of course you need to start a listening program first), so closing this bug ticket now.
** Changed in: qemu Status: New => Fix Released -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/994412 Title: reverse vnc to unix domain sockets does not work Status in QEMU: Fix Released Bug description: I tried to connect to a unix domain socket, but failed. $ qemu -vnc unix:/tmp/my.sock,reverse connect(unix:/tmp/my.sock,reverse): No such file or directory I guess it is because unix_connect does not remove characters after first comma. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/994412/+subscriptions