Re: Frequent USB mouse disconnections under load with RELENG_7

On Fri, Feb 01, 2008 at 10:00:11PM +1030, Wayne Sierke wrote:
- I've also just noticed that I'm getting these messages on startup
under 7.x:

kernel: Starting devd.
kernel: Starting ums0 moused:
kernel: Starting default moused:
moused: unable to open /dev/ums0: Device busy

but I can't now recall whether I was seeing those under 6.x. Has devd
changed with 7.x? I've got a feeling that I'd tried to get devd in 6.x
to handle the USB mouse on startup, but that I'd found it necessary to
configure moused explicitly (i.e. with moused_port) in rc.conf as listed
below. However my memory of it now is hazy at best. In any case,
disconnections aside, I've not noticed any change in mouse behaviour
since moving to 7.x either in console or xorg.

moused_enable="YES"
moused_port="/dev/ums0"

I think this is what's happening here:

* kernel starts
* usb stack loads, finds a USB mouse, attaches it to ums0
* attachment tells devd "hey, theres a /dev/ums0 device that
just attached"
* /etc/devd.conf automatically spawns moused, which attaches to
the /dev/ums0 device
* rc scripts begin
* moused_enable="yes" is detected, thus moused is run manually
against /dev/ums0
* moused is already running from when devd spawned it, which is
why /dev/ums0 is "Device busy"

I would recommend removing the moused_* stuff in your rc.conf and
let devd take care of it, or, consider editing /etc/devd.conf and
removing the /dev/umsX detection which runs moused.

--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |

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