### Federico Fuga

Engineering, Tech, Informatics & science

# Vmware Player is slow under Ubuntu 16 host

10 Oct 2016 17:57 +0000
So you just upgraded your Ubuntu box and found that all your VmWare Windows Boxes are extremely slow?

The symptom is your Windows task manager showning 100% usage of your disk, and the WIndows Instrumentation showing very long lags, says, up to 2.5seconds (yes, seconds) to respond to a disk request. This makes the box practically unusable.

Perhaps your vmware logs are shoing a lot of lines like

scsi0:0: Command READ(10) took 2.748 seconds (ok)
scsi0:0: Command WRITE(10) took 3.224 seconds (ok)

and so on...

Well, this is a well known issue. A quick search with google will point you to the vblank_mode=0 fix.

Indeed I already fixed that on my box, my /etc/profile file already exported it.

But for some (obscure) reason, it doesn't work anymore. Again, a (this time) long search will point you to the correct answer: [this post](http://stackoverflow.com/a/29329265/4000694) suggests  to check another variable if you are using closed sources drivers for Nvidia, __GL_SYNC_TO_VBLANK=0.

Indeed this worked very well. I don't know why it changed, I suspect that the Ubuntu upgrader silently changed from open source to closed source drivers. Perhaps I tried them and when I switched to Open Source drivers, something remained. Really, I don't know, if someone has the response, please share it.

Now my Windows Boxes are fast enough to be used; now I have to deal with Windows Updates, but this is yet another story.