They occur always, and when they happen if I am half way through issuing an order it never finishes being issued, the towed array/radio wires can get jammed, once I've had my active intercept stop working on me, and a couple of times passive sonar trackers would no longer engage. I know I like realism, but this is just too much like being on a 50 year old sub ! ;-)
On the navmap I can distinctly see when it happened if I turn ownship (and other ship) histories on.
(
http://i.imgur.com/9eSbE.png )
Settings:
Parent OS: Fedora 16 64bit
VirtualBox: 4.1.2_OSE (package from RPM Fusion)
Guest OS: Windows XP SP3 with guest extensions installed.
VM settings:
512MB RAM, IO APIC disabled, EFI disabled, Hardware clock UTC enabled, Absolute pointing device enabled.
1 CPU, no execution cap, PAE/NX disabled.
VT-x bit is on, and nested paging is enabled.
Video memory set to 64MB, 2D and 3D both ticked and working (through the guest extensions)
10GB fixed size storage VDI
Host audio set to ALSA (but is really PulseAudio).
Game: Stock DW 1.04
Game options: Wind, Currents, Waveriding are all on.
Graphics options: 1024x768 full screen, water quality off, reflection quality off, draw method: pixel color. All advanced 3D options off.
Sound: Speech recognition enabled, music disabled, "special effects" on.
I have just disabled the pagefile in the guest, will see if that helps, failing that will disable sound and see if it is sound related, as well as playing about with the number of sound buffers... unless this is triggered by some graphics thing or I am going off in a completely wrong direction. If you have a working virtualbox please list your settings differences!