Guest Ubuntu 12.04 stuck at splash screen

[astroangel]

Here's my setup:
Host machine: Windows 7
Guest: Ubuntu 12.04
VirtualBox 5.1.2

I was able to install and use Ubuntu successfully for a long time. However, now when I try to restart it, it only shows the Ubuntu splash screen. I tried some other suggestions like reducing the number of CPUs etc., but to no avail.
I also don't see any errors/warnings in the log files. Here's the log from the latest attempt to start the guest OS.

Appreciate all the help from the community.

Thanks

[raynebc]

The last several releases of the guest additions haven't been as compatible with some Linux distributiosn (including Ubuntu). The easiest way to tell if this is the problem is to disable the 3D acceleration for your Ubuntu VM and start it up. If it then works, the easiest solutions are to use an old version of guest additions (5.0.16 or older) or to leave the 3D acceleration disabled. The hard solution is to debug the problem, but that would probably require a very high level of expertise.

[socratis]

@raynebc
The OP is using Ubuntu 12.04. Same as I. No problem whatsoever with the GAs. But the 3D suggestion is not that bad of an idea.

@astroangel
Your log ends prematurely. Do not capture the log while the VM is running. Please try once more. And zip it first.
Also, could you explain the name of the VM? "ubuntu_androidEnv_12" has an ... unusual sound.

[astroangel]

Thanks for your replies and suggestions.

@ryanbec
I checked and the 3D acceleration is already disabled.

@socratis
I uploaded the log one more time. I am using the machine to build android images; hence the name.

Thank you.

[socratis]

I don't see anything out of the ordinary, unless I'm missing something. But I re-read the thread and I noticed this:

when I try to restart it

What happens if you do a full shutdown instead of a restart? Do you still see the same behavior?

I hope not, because I'm out of ideas...

[astroangel]

@socratis,

The behavior is the same even with a shutdown. It just refuses to start!

Thanks for your help anyway. I will continue to look for possible solutions and will post if I find anything helpful.

Thanks.

[Perryg]

What is drive E: on the host?

I would like you to test a few things for me.

• 1) set the USB to USB 2 ( eHCI )
  2) Then disable USB2 if the above does not help.

If you still need assistance then post the following:

• From the hosts terminal/command window type VBoxManage showvminfo <VM Name> --details and post here. Replace <VM Name> with the actual name of the VM. Use " " if the name has a space in it.
  
  Note if the host is Windows you need to be in the directory that has VBoxManage.exe for the command to work.

Also I see that the install was successful. When did this start to *not* work? Was it at the first boot after install or later. If later had you installed anything in the guest, and if so what?