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Using Virtualbox 5.0 with Windows 8.1 as host and Ubuntu 14.04.2 as guest. It is extremely slow. I have tried

1) Increasing the RAM size

2) Used multiple processors in Systems->Processor tab (have IntelCore i7 processor)

3) Enabled 3D Acceleration in Display->Screen tab

4) Increased the video memory

5) Tried enabling/disabling Extended features in the settings

6) Also tried Ubuntu-15.04 (behavior remains the same)

Here's (Why does a Ubuntu guest in VirtualBox run very, very slowly?) from a user some time back.

The system is still slow...is there anything to be done in the BIOS? and i doubt it, as my windows is pretty fast. Any help appreciated! (Thanks!)

Community
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Muzab
  • 39
  • Have you tried to install VirtualBox Guest Additions ? – hg8 Aug 04 '15 at 09:09
  • Did you install guest additions? – Pilot6 Aug 04 '15 at 09:09
  • Have you tried changing the virtual machine's chipset? – Sledge Hammer Aug 04 '15 at 09:12
  • Thank you guys for the comments and suggestions ( I will work on them in a shortwhile). i am trying to re-install now the Ubuntu guest, and its been an hour and its still going on. – Muzab Aug 04 '15 at 09:16
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    Did you enabled VT-X hardware acceleration on your BIOS and VM config?, also maybe you're using a x86 guest ubuntu instead of x64. – bistoco Aug 04 '15 at 09:21

  • Changed the Chipset to ICH9

  • Installed Guest Additions (It is latest now)

  • My V-Box version is 5.0.0-101573-Win (It is 64 bit)

    • It is still slow. I am going to try with the "VirtualBox-5.0.0_RC3-101436-Win.exe" version. Thanks again!

    – Muzab Aug 04 '15 at 13:15
  • @bistoco: Your options were already enabled (double verified) – Muzab Aug 04 '15 at 13:35
  • Here's some more things you can try to speed up your virtual Ubuntu: http://askubuntu.com/questions/289677/how-to-improve-performance-of-virtualbox-when-unity-low-gfx-mode-is-not-working – Takkat Aug 04 '15 at 17:56