What is evdev and autoloading?

[Rodney W. Grimes]

> On Sun, Feb 17, 2019 at 03:04:41PM -0800, Mark Millard wrote:
> > 
> > 
> > On 2019-Feb-17, at 10:03, Steve Kargl <sgk at troutmask.apl.washington.edu> wrote:
> > 
> > Anyone have insight into what evdev is?  There appears to
> > be no manual page.  When I reboot a system with custom
> > kernel, the system is autoloading evdev.ko, uhid.ko, and
> > wmt.ko.  I do not need nor what these modules loaded.
> > How does one prevent this autoloading?
> > 
> > Looking via the web lead to:
             ^^^^^^^^^^^^^^^
web lies

> > 
> > https://www.freebsd.org/cgi/man.cgi?query=evdev&apropos=0&sektion=4&manpath=FreeBSD+12.0-RELEASE&arch=default&format=html
> > So:
> > 
> > NAME
> >        evdev - Generic Linux input driver
> > 
> > DESCRIPTION
> > 
> > 	evdev is an Xorg input driver for Linux's generic event devices. It
> > 	therefore supports all input  devices  that  the kernel	 knows about,
> > 	including most mice, keyboards, tablets and touchscreens. evdev
> > 	is the default driver on the major Linux distributions.
> > . . .
> > 
> > 
> > 
> > but it seems to not have a 13-current entry. It does have
> > a 12.0-RELEASE entry.
> > 
> 
> Thanks.  Kinda odd that freebsd-current doesn't have a manual
> page, but FreeBSD-12 does.

rgrimes at t400:~ % man evdev
No manual entry for evdev
rgrimes at t400:~ % man -k evdev
apropos: nothing appropriate
rgrimes at t400:~ % uname -a
FreeBSD t400.dnsmgr.net 12.0-RELEASE FreeBSD 12.0-RELEASE GENERIC  amd64
rgrimes at t400:~ % 
There is no man page for evdev in 12.0-RELEASE

> 
> I have a wireless logitech mouse.  It seems that the
> wireless USB dongle is causing the load of the modules.
> I still understand why as ums(4) does not should a 
> dependency on uhid, wmt, or evdev.
> 

-- 
Rod Grimes                                                 rgrimes at freebsd.org