On 07/23/09 15:21, Patrick Rauscher wrote:
the problem is, that when i select "save machine", the guest seems to
not notice the time he spends in saved status. so, when i unsave the
machine 2 hours later or so, the system-watch of the guest seems to be
wrong.
host & guest are ubuntu 9.04 .
host is using fluxbox, guest gnome.
I reported a similar problem a few months ago with either
OS X or XP host and Solaris guest. I observed it when I
put the host (laptop) to sleep; when I reawaken the host,
the guest clock is wrong but the host clock (of course) is
correct.
Suggestions on this list were:
o Install Guest Additions, which steers the clock better.
o Run NTP on the guest.
Neither of these is particularly satisfactory; both seem to
steer the clock by only a small amount, 1% or so, so if my
host sleeps for several hours, it will take the guest a
few weeks to catch up.
Then a Solaris developer told me the problem can't be solved
because the host passes no indication to the guest that the
host has slept; WAD.
But I've subsequently observed that I can create the same
(mis-)behavior by Pausing (Host)-P the guest, then resuming.
The guest clock is then slow by the duration of the Pause.
In this case, VBox surely knows about the Pause; VBox itself
did it. I consider this a defect requiring repair: on Resume
VBox should reload the emulated BIOS clock (or whatever) from
the host BIOS clock; perhaps signal the guest that it has
slept, as on a laptop with the hinge closed.
So far, I deal with it by:
sudo rdate india.colorado.edu
http://en.wikipedia.org/wiki/Rdate
-- gil
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