[vbox-dev] Bug#735595: Patch to update RTC after time change

Frank Mehnert frank.mehnert at oracle.com
Fri Mar 11 11:57:17 UTC 2016

Hi Gianfranco,

we will not apply this patch. I provided the rationale in


We will probably fix VBoxService to use adjtimex() instead of adjtime()
which should be enough for most users. We also might synchronize the
RTC with the system time on 'steps' (ie host/guest time are out of sync
for more than 20 seconds) but the latter still needs to be discussed

Kind regards,


On Friday 11 March 2016 10:23:24 Gianfranco Costamagna wrote:
> Hi Sam and VBox developers,
> I'm forwarding the following mail to VirtualBox Developers's list
> can you please release it under MIT license, to allow them review and
> possibly apply it?
> cheers,
> Gianfranco
> Il Giovedì 10 Marzo 2016 19:18, Sam Morris <sam at robots.org.uk> ha scritto:
> Here's a patch to VBoxService that makes it write to the RTC after it
> updates the system clock.

Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox
ORACLE Deutschland B.V. & Co. KG | Werkstr. 24 | 71384 Weinstadt, Germany

ORACLE Deutschland B.V. & Co. KG
Hauptverwaltung: Riesstraße 25, D-80992 München
Registergericht: Amtsgericht München, HRA 95603

Komplementärin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Geschäftsführer: Alexander van der Ven, Jan Schultheiss, Val Maher

More information about the vbox-dev mailing list