Em 19-12-2013 17:56, Adam Jensen escreveu: > I've been using a KVM switch (USB keyboard and mouse) on a couple of > machines recently and I noticed that when the Keyboard, Video, and > Mouse connections are switched away from the OpenBSD machine, a USB > disconnect is reported (as expected). When switched back, the keyboard > and mouse are not reconnected (video is displayed, of course). Once > the machine is in this state, I can continue to work with it through > ssh but if the machine is "shutdown -hp" or "halt -p" it hangs during > the "Syncing disks..." stage and stays there indefinitely (or until > the power cable is pulled). The file-systems are not cleanly > unmounted. This behavior occurs with an i386 machine and with an amd64 > machine. > > It seems like it might be a serious issue if the USB software stack is > preventing a disk sync. > Do you have all patches on http://www.openbsd.org/errata54.html applied? Specifically, I had random issues until I've applied this one: http://ftp.openbsd.org/pub/OpenBSD/patches/5.4/common/003_vnode.patch
Also, try enabling the ddb.panic sysctl flag, it might help debugging the issue. A dmesg would help too. -- Giancarlo Razzolini GPG: 4096R/77B981BC
