Impossible to disable the time synchronization Please copy and paste below your *.vmx file model. Will keep you ' = 'FALSE' but the KB said there should be = 'FALSE'.» Your initial message, I found that something is different with the content of KB.
I'm using VMWare Workstation 8.0.1 on Windows 7 Pro x 64. I also disabled the functionality of Windows to "synchronize with a time server Internet. I tried on the hosts Windows 2008 x 86 and Windows 2008 R2 with the same results. = "FALSE".īut no matter what, the time of comments still synchronizes to the host after turning the power on or return to. I closed the comments and edited the VMX file as follows: I read 1189 KB # as well as various articles on disabling time synchronization between host and guest, but I can't seem to stop synchronization. VMwareService.exe –cmd “vmx.Impossible to disable the time synchronization in VMWare Workstation 8.0.1 IMHO it would be much more sensible if you could simply specify the value you want to set and not require the current value to be specified. Obviously you can “ignore” this error when run (so not a huge deal) but the current design seems a bit dumb. So – if you run this command on a machine which has this already set, you will get an error saying – “Invalid old value“. So, if time sync is disabled, you can enable it by running the following command line in the guest: VMwareService.exe –cmd “vmx.set_option synctime 0 1″įor some (IMHO stupid) reason, this utility requires you to specify the current as well as the new value (I assumed it would be posible to set this as a parameter / config option during tools install)Īfter a bit of searching I found a way to do this in a VMware article called “Using the VMware Tools Command-Line Interface“. Surprisingly, this wasn’t quite as straightforward as I expected. There a several ways to do this from outside the VM, but I wanted to find a way to enable time sync from within the guest itself either on or after tools install. However – “best practise” is to enable time synch on Windows Guests.
When installing VMware Tools on a Windows Guest, “Time Synchronisation” is not enabled by default. Once this (/usepmtimer switch) was done the clock was dead on time.
Note The driver installation may add the /usepmtimer switch in the Boot.ini file.
Resolution: To resolve this problem check with the hardware vendor to see if a new driver/firmware update is available to fix the issue. Other available timers include the PM_Timer and the High Precision Event Timer (HPET). Newer operating systems typically do not use the TSC by default if other timers are available in the system which can be used as a timekeeping source. The operating systems which use TSC as a timekeeping resource may experience the issue.
Multi core or multiprocessor systems may encounter Time Stamp Counter (TSC) drift when the time between different cores is not synchronized. for additional information."Ĭause: This problem occurs when the computer has the AMD Cool'n'Quiet technology (AMD dual cores) enabled in the BIOS or some Intel multi core processors. "Your host system does not guarantee synchronized TSCs across different CPUs, so please set the /usepmtimer option in your Windows Boot.ini file to ensure that timekeeping is reliable. We still had horrendous drift, although it had shrunk from 15 minutes or more down to the 3 or 4 minute range.įinally in the vmware.log I found this entry (resides in the folder as the. I did everything imaginable that I found on various internet sites. I had the VMware Tools installed and set to sync the time. The Host is also Windows Server 2003 R2 Standard. In my case we are running VMWare Server 2.02 on Windows Server 2003 R2 Standard.