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Ticket Resolution Summary Owner Reporter
#5303 obsolete Performance issue with bridged networking, Solaris host and nfs Thomas Berg
Description

I've tested 3.0.8 for a while on my Solaris 10 U8 x86 box and it's been quite stable. I do seem to have some performance issues though. I've discovered one thing at least. When running Linux guests with bridged networking mounting a nfs share from the host, transfer speeds are really slow (4-600KB/s). This was using guest additions. Here's what I tried: Ubuntu 9.04 x86_64 guest - bridged networking

  • Mounted nfs share from host (shared either using "zfs sharenfs" or using share command). File copy speed 4-600KB/s
  • Mounted nfs share from a stand alone Ubuntu machine. Speed 20-30MB/s
  • Mounted vbox shared folder. Speed 30-40MB/s
    • PS. I often get "protocol error" messages when trying to mount shared folders using "mount -t vboxsf" but suddenly it works

Shutdown guest, changed network to NAT and booted

  • NFS share from host - Speed 30-40MB/s
  • vbox shared folder - Speed 30-40MB/s
    • don't seem to get any errors mounting shard folders using NAT but that might be a pure coincident.

I tried with a Fedora 11 guest as well with the same results.

I've attached a VBox.log from the session using bridged networking and nfs mount from host.

#11626 obsolete Can't alt-tab out of guest os to host os applications. thomasss.pers
Description

I use os x as host os and windows as guest os. If I do alt-tab in windows (guest) nothing happens. If I do host-tab I can tab with the window applications that are running.

I want to be able to tab out of my guest os to my host os applications. Now I have to click somewhere on the host os (eg desktop) to get focus and then tab.

I have an older version of virtualbox at home where I run the same host and guest os and there I can alt-tab out of my guest os.

I haven't done any modifications for this that I am aware of. I visited your irc channel on freenode and michael-vb told me to fill in a bug report.

#13667 obsolete Xubuntu 14.04.1 amd64 guest crashes on OS X 10.10.1 host, VirtualBox 4.3.20 r96996 thomaslc
Description

Xubuntu 14.04.1 amd64 guest will boot and run, but eventually crashes (the amount of time the vm will run before crashing varies) an OS X 10.10.1 host running VB 4.3.20 r96996. Same behavior running the 4.3.21 r97018. Same behavior after building new Xubuntu 14.04.1 amd64 VMs (applying all Xubuntu updates, installing dkms, installing guest additons). One aspect of my setup that may be unique compared to other users is that I have an external USB drive that contains my Xubuntu account's home directory. My setup (OS X host, VB, Xubuntu guest, externa USB drive) ran reliably till recently. I was running OS X 10.9 on the host and Xubuntu 12.04 amd64 on the guest until one or two weeks ago; I'm guessing at the version number, but I started having problems with VB 4.3.10 or maybe one of the last few releases of 4.2.X. Thought my old external USB drive was going bad so I replaced that but had the same behavior: VM hung sporadically. Updated OS X on the host and Xubuntu on the guest with the result that the VM hangs more frequently.

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