Problem with mouse during high CPU load

[Alexander Best]

On Fri Mar 18 11, Warren Block wrote:
> On Fri, 18 Mar 2011, Alexander Best wrote:
> 
> >On Fri Mar 18 11, Anonymous wrote:
> >>Alexander Best <arundel at freebsd.org> writes:
> >>
> >>>i've reported this issue quite a while ago [1], but back then nobody was 
> >>>able
> >>>to help me. i have an issue with my usb mouse. when there's a high CPU 
> >>>load it
> >>>produces random mouse clicks. this doesn't happen on other OSes. i've 
> >>>attached
> >>>a different usb mouse to my freebsd box and i could't observe the same
> >>>behavior. so it seems this problem is only related to specific mice.
> >>
> >>I'm curious, can you reproduce it without moused(8), i.e. specifying
> >>/dev/umsN in xorg.conf rather than /dev/sysmouse.
> >
> >wow that worked. :)
> >
> >i've set my mouse to /dev/ums0 and set Option "AllowEmptyInput" "off", 
> >because
> >without that line i couldn't use the mouse.
> 
> Please use Option "AutoAddDevices" "Off" if you want to disable hal 
> hotplugging in xorg.conf: http://www.wonkity.com/~wblock/docs/html/aei.html
> 
> >even with very fast movements i don't get any random clicks anymore. 
> >although
> >this a solution works for X, for the console the only way to use a mouse is
> >moused(8).
> 
> Yes, but moused is autostarted for USB mice by
> moused_nondefault_enable="YES" in /etc/defaults/rc.conf.

ahh. so putting moused_nondefault_enable="NO" in my rc.conf should prevent
moused(8) from starting?

i suspect moused(8) can't handle the amount of input that get produced by newer
usb mice with a high input rate. maybe some buffer is too small. i don't think
this is a usb issue.

i'll take a look at moused(8) and see if i can find where the problem occurs.

cheers.
alex

-- 
a13x