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Date:      Mon, 12 Mar 2001 19:31:25 -0500
From:      The Babbler <bts@babbleon.org>
To:        Nick Sayer <nsayer@quack.kfu.com>
Cc:        "Karel J. Bosschaart" <karelj@wop21.wop.wtb.tue.nl>, emulation@freebsd.org
Subject:   vmware/rtc (was: vmware networking & sysmouse)
Message-ID:  <3AAD6A5D.FF845D87@babbleon.org>
References:  <200103112208.f2BM88L85365@gc0.generalconcepts.com> <20010311221123.B1541@tao.org.uk> <3AABF9DF.5E3C6E1F@babbleon.org> <3AAC3D1C.FB6FA0EB@babbleon.org> <20010312092107.A67643@wop21.wop.wtb.tue.nl> <3AAD65D2.6070605@quack.kfu.com>

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Nick Sayer wrote:
> 
> Karel J. Bosschaart wrote:
> 
> > On Sun, Mar 11, 2001 at 10:06:04PM -0500, The Babbler wrote:
> >
> >> And I gather that nobody's figued out how to turn off /dev/rtc by
> >> default?  I tried denying non-root users read permission, or granting
> >> them write permission, to /compat/linux/dev/rtc, but that didn't stop
> >> the 100% CPU problem.
> >>
> > I turned it off by deinstalling rtc with pkg_delete. You need the -f
> > (force removal) option because it is recorded to depend on vmware2.
> > After removal, I don't have 100% CPU usage anymore. It'll give you a
> > warning message on startup of the vmware guest that rtc isn't present,
> > but for the rest it works fine (NT4 and Win2000).
> >
> > Karel.
> 
> This will make media operations in win9x guests somewhat unpleasant. If
> you run nothing but FreeBSD guests, then I guess it's a moot point.
> 
> Does anyone know what the issue really is? Perhaps it's worth putting an
> option in the kernel to make it not do whatever causes it to chew CPU?
> People using vmware could use option VMWARE_GUEST or some such in guest
> machines' kernels to make it not do that.

I run win 98se as my guest and always disconnect the rtc as soon as I
start up.  I haven't noticed any odd effects.  What "media operations"
will be endangered, and how?

Or is deleting the rtc different from just disconnecting it?

I run a laptop; running 100% CPU really isn't ok with me--the machine
gets noticably hot over time and battery life is impacted.

-- 
"Brian, the man from babble-on"              bts@babbleon.org
Brian T. Schellenberger                      http://www.babbleon.org
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