I'm running Ubuntu 15.04 as a Virtual Machine in VirtualBox on a Windows machine. I have 3D acceleration enabled, as well as all the fancy CPU features. In other words, pretty much my whole CPU and most of my RAM (I've set it all the way to 2GB and the problem persists) are dedicated/exposed to Ubuntu.
The symptoms shown are:
laggy menus/graphics overall
extremely slow operation in Text only interface
I've run a memory check with
but there's plenty of memory left (>700MB) and no swap in use. The CPU however, is showing about 150% usage (Hmmm, what's that supposed to mean...). Are there some drivers I need for my CPU, or is something else wrong?
I've used this same exact machine with NO HARDWARE CHANGES (also with less RAM, by the way) to run Ubuntu natively, and it performed outstanding. How comes is dis?
AMD Athlon X2 64 2.2GHz dual core CPU
Nvidia GeForce 6800 GPU
3GB 800MHz DDR2 (2GB exposed)
and several decent hard drives
Since the time I asked this question, I have tinkered around trying to get it to work some. I installed the VirtualBox Guest Addition Kernel Modules, and now it is stuck in an infinite loop at the GUI login, and is 100% inaccessible. I can't get to the TUI, and nothing works. So, since it looks like I'll be doing a reinstall now, I'm open to answers that require that.
I've installed more RAM (I now have 6GB) so I can test with adding extra RAM up to 4 or 5GB to the guest OS.