freebsd stable - Sep 2010 - After 7.3->8.1, moused on serial mouse draws 100% CPU

After upgrading from 7.3 to 8.1, moused has started drawing 100% CPU
(even when the mouse is not used).  moused -d -f doesn't output anything
suspicious  - in particular, it does not display anything when the mouse
is not moved.

root    10833 100.0  0.1  1732  1100  v0  R+   10:51AM   8:47.62
/usr/sbin/moused -d -F 200 -A 1.5 -a 0.5 -p /dev/cuau0 -t auto -d -f

FWIW, I was using the uart serial driver even on 7.3.  (Maybe this is
also the time to mention that mouse movement got much slower after the
move to uart - that's why the -F -A -a settings are in there.)

Any help would be much appreciated!

-- 
Regards,
Mike

On Thu, Sep 16, 2010 at 11:02:38AM +0200, Michael Sperber
wrote:
> After upgrading from 7.3 to 8.1, moused has started drawing 100% CPU
> (even when the mouse is not used).  moused -d -f doesn't output
anything
> suspicious  - in particular, it does not display anything when the mouse
> is not moved.
> 
> root    10833 100.0  0.1  1732  1100  v0  R+   10:51AM   8:47.62
/usr/sbin/moused -d -F 200 -A 1.5 -a 0.5 -p /dev/cuau0 -t auto -d -f
> 
> FWIW, I was using the uart serial driver even on 7.3.  (Maybe this is
> also the time to mention that mouse movement got much slower after the
> move to uart - that's why the -F -A -a settings are in there.)
>
> Any help would be much appreciated!
Adding ed@ to CC list, since he maintains uart(4), which is now the
default serial driver on 8.x.

Michael, in the meantime can you provide dmesg details that pertain to
your serial ports?  uartXX devices would be sufficient, in addition the
device its attached to (e.g. acpi0, etc.).

Thanks.

(Footnote: I wasn't even aware people still had/used serial mice any
more, given the popularity of PS/2, and now USB...)

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

Michael Sperber wrote:
>
> After upgrading from 7.3 to 8.1, moused has started drawing 100% CPU
> (even when the mouse is not used).  moused -d -f doesn't output
anything
> suspicious  - in particular, it does not display anything when the mouse
> is not moved.
>
> root    10833 100.0  0.1  1732  1100  v0  R+   10:51AM   8:47.62
/usr/sbin/moused -d -F 200 -A 1.5 -a 0.5 -p /dev/cuau0 -t auto -d -f
>
> FWIW, I was using the uart serial driver even on 7.3.  (Maybe this is
> also the time to mention that mouse movement got much slower after the
> move to uart - that's why the -F -A -a settings are in there.)
>
> Any help would be much appreciated!
>
I sent an email describing similar regression on 16/1/2010 but no one 
replied.  The thing is that since moving to 8.x moused in console 
consumes way too much CPU as soon as mouse starts moving.  :-/

M.