I am currently running Windows 7, and am attempting to set up an Ubuntu installation in VirtualBox. The purpose of my installation is educational - I would very much like to "learn" linux.
Unfortunately, I am encountering various problems with the installation that I'm finding hard to pin down. I have tried to look for similar threads with solutions, but as I understand very little of what is going on it's hard to know what is relevant. I would very much appreciate a guiding hand to point me to things that I should know, and make sure I'm doing nothing "wrong".
Story so far:
First (naive) attempt to install - successful, but extremely slow (installed overnight). There was an extreme lag problem (all programs, and mouse input were lagging). The lag problem was fixed by switching the "Enable IO APIC" option to ON. At this point, Ubuntu was running, and seemed fully functional. However, since I had only allocated 8Gb of disk space I very quickly ran out (I immediately attempted to install full TeX support, which is quite space-hungry!). The internet made increasing disk space look like a particularly nasty chore, so I decided the easiest way would be to do a full reinstall, with 40Gb space. I deleted the functional Virtual Machine, not expecting any problems with a reinstall (retrospectively a mistake).
Several unsuccessful attempts. According to all internet sources, my Linux install should take around 40 minutes. However, the installation keeps getting stuck at different points, for hours (each time, I waited up to ~5 hours before closing and trying again). For example, one time it was stuck at something that sounded like "post-installation trigger software-center", and my current attempt is stuck at "configuring hardware".
After each new attempt, I must delete the partition and allocate a new, clean one, else the install hangs immediately, a couple of screens after the initial "install" button. I systematically enable the IO APIC option, otherwise the installation proceeds extremely slowly, as before.
A couple of things I have noticed, and don't understand/am worried about
Only 12Mb of "Video Memory" have been allocated. I'm not sure whether this is the same thing, but my host OS has access to 1Gb dedicated Video RAM.
After deleting partitions, the free space does not seem to be recognised by my host OS. (In Windows Explorer, the free space displayed next to my C: drive decreases by 2Gb after each attempt). Perhaps this problem will solve itself? (I believe Windows 7 schedules automatic defragmentation).
Ubuntu version: 12.10 VirtualBox version: 4.2.6 Host OS: Windows 7 Home Edition (Service Pack 1) Hardware: Aspire 5755G laptop, 6GB RAM (1GB allocated to guest OS) 500GB HDD (40GB allocated during unsuccessful attempts) Intel Core i7-2670QM, 2.2GHz NVIDIA GeForce GT630M, 1GB Dedi VRAM
Thank you in advance for your valuable time! Please don't hesitate to ask for additional information.