On Sun, Mar 13, 2005 at 10:48:46AM -0800, Mikko Ty?l?j?rvi wrote: > > Hi, > > On Sat, 12 Mar 2005, Loren M. Lang wrote: > > >It seems that FreeBSD 5.3 now has support in the kernel for the > >synaptics touchpad that my laptop has. Right now it's just running as a > >normal mouse, it looks like the support is disabled by default. In > >isa/psm.c, I can see the synaptics support in there, but it's disabled > >unless hw.psm.synaptics_support is set to 1. My question is how do I > >set it to one? It's setup as a TUNABLE_INT, but there is no sysctl for > >it. Does it only appear on boot? > > It is not a sysctl, it is a kernel tunable. You control it from the > boot loader, for example by putting > > hw.psm.synaptics_support="1" > > into /boot/loader.conf. See loader.conf(5) and /boot/defaults/loader.conf > for more information.
That's what I was wondering and I tried to set it in the loader, but I
haven't noticed a difference. No added sysctls to tune the touchpad, no
kernel messages showing anything obvious, the touchpad still acts the
same, etc. Also, I looked through the kernel sources for other
TUNABLE_INT's:
...
/usr/src/sys/cam/scsi/scsi_all.c:
TUNABLE_INT_FETCH("kern.cam.scsi_delay", &delay);
/usr/src/sys/cam/scsi/scsi_cd.c:TUNABLE_INT("kern.cam.cd.changer.min_busy_seconds",
&changer_min_busy_seconds);
/usr/src/sys/cam/scsi/scsi_cd.c:TUNABLE_INT("kern.cam.cd.changer.max_busy_seconds",
&changer_max_busy_seconds);
/usr/src/sys/cam/scsi/scsi_cd.c: TUNABLE_INT_FETCH(tmpstr,
&softc->minimum_command_size);
/usr/src/sys/cam/scsi/scsi_da.c:TUNABLE_INT("kern.cam.da.retry_count",
&da_retry_count);
/usr/src/sys/cam/scsi/scsi_da.c:TUNABLE_INT("kern.cam.da.default_timeout",
&da_default_timeout);
/usr/src/sys/cam/scsi/scsi_da.c: TUNABLE_INT_FETCH(tmpstr,
&softc->minimum_cmd_size);
...
sysctls -a|grep cam:
kern.cam.scsi_delay: 15000
kern.cam.cd.changer.min_busy_seconds: 5
kern.cam.cd.changer.max_busy_seconds: 15
kern.cam.da.retry_count: 4
kern.cam.da.default_timeout: 60
It looks like all these tunables are also sysctls.
>
> $.02,
> /Mikko
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