On 12/20/2013 09:05 AM, Giancarlo Razzolini wrote:
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.
I rebuilt the machines recently and I have not been able to reproduce
the system hang during shutdown. The USB devices still don't reconnect
after being disconnected but both machines have been powering down
without any problems. So on the one hand, huzzah! It works. On the other
hand, wtf?
