Stuttering Music with Ubuntu Mate 17.10 as Host OS

[BertN45]

I try to use Ubuntu Mate as host for my Virtual Machines (VM) and I have separate VMs for Office work, banking, wma music and another one to try out Apps. I use Virtualbox 5.2.8.
If I use the Windows-XP VM with the Ubuntu Mate Host 17.10, the music from the Windows Media Player sounds terrible.
If I use the Windows-XP VM with the Ubuntu Host 17.10, the music from the Windows Media Player sounds very good, no problems.
I remember around one year ago, I had the same problem between Lubuntu 16.04 and Ubuntu 16.04, so I stuck to Ubuntu at that time. Both now and one year ago, you could see the graphs of the task manager of Win-XP stutter too. So it has nothing to do with pulse-audio.

I wonder whether the difference is caused by the settings of the (scheduling?) timing parameters at the moment the desktop starts. It looks like the XP-VM is deprived from CPU time for a too long period. I have both desktops installed on the same machine, if I login in in Ubuntu Mate I get the stuttering, if I logout and logging again in Ubuntu itself the music sounds OK.

Please solve it for me in 18.04, because Ubuntu itself is growing bigger than Windows 10. I have an old HP dc5850 from 2008 with a Phenom II CPU, a Nvidia Video card both from 2010 and the memory is maxed out to 8GB. Using VMs and the ZFS file system (max cache 1GB) with three 320/500GB HDDs, I can use each 100MB Mate gives me more than Gnome :)

[Launchpad Janitor (janitor)]

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