VirtualBox = 4.3.22 r98236
Guest = Xubuntu 14.10
I just created a new VM today, installed Xubuntu 14.10 into it, performed all Xubuntu updates (restarted when done), and then installed VirtualBox Guest Additions (shut down when done).
I then went in VirtualBox and changed a few of that VM's Settings, including
Display --> Video --> Video Memory: 12 MB --> 64 MB Extended Features: Enable 3D AccelerationWhen I restarted the Xubuntu VM, some things like opening a Terminal emulator work fine, but if I launch a web browser (Firefox is the install default), I get this error dialog:
(Text, in case that image hosting site drops the image: "The instruction at 0x80440033 referenced memory at 0xb0177468 The memory could not be read. Click on OK to terminate program."
EDIT: this forum refuses to display the image. Anyone know of a solution? Its URL = http://postimg.org/image/wkf4xq7c7/)
If I turn off 3D acceleration, then this bug disappears.
A web search found some related bugs: link1 and link2.
link1 had quite different symptoms, but the problem also seems to have been caused by enabling 3D acceleration.
link2 also had different symptoms, but the problem seems to have been caused by an unsigned Nvidia driver, which fails in the latest security hardened VirtualBox. I can rule out this issue on my box: following the procedure described here (i.e. run Microsoft's sigverif.exe tool), I found that my host has zero unsigned system files.
I am attaching 2 Xubuntu logs, plus all 4 VirtualBox logs, if that helps anyone to diagnose. (Both had to be packaged inside separate zip files to work around this forum's attachment size limits.)
Thanks in advance!