VirtualBox

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Ticket Resolution Summary Owner Reporter
#17649 fixed Drag/Drop files stop working when restarting VM from saved state -> fixed in 5.2.20 LeNix
Description

I am running virtual Box 5.2.8 r121009 with a windows 10 VM running on a host Ubuntu 16.

The problem is that when I start my windows VM the drag/drop files works seamlessly in the beginning. I can drag drop files from my windows VM desktop to the Linux without a problem.

But then I choose to shut down my VM and in the "Close Virtual Machine" dialog i choose "Save the machine state". When I power on the machine again and restore it's state, the drag/drop files option stop working.

The only way to get the option back is to shut down my VM machine completely instead of saving it's state. But then that means i have to restart windows 10 and wait for the whole boot procedure.

Can you please fix this issue as it's a real pain to do it like this...

#3665 fixed New network model = degraded performance Alexey Loukianov
Description

There is severe network throughtput degradation between host and guests under linux hosts when using bridged networking since VirtualBOX changed its networking model not to use tun/tap and host-side bridging.

How to reproduce:

Sample prerequisites: Fedora 8 host, Windows XP guest, any ethernet card as eth0 on host with link up on 100MBit and any 1GBit guest NIC.

First try:

1. Set guest to use bridged networking, bridge its NIC with eth0 host interface.
2. Boot up guest and use any network channel bandwidth test utility to test network througthput between host<=>guest.
3. Result: approx. 100MBit. (95MBit in my case)

Second try:

1. Create new tap interface on host with command like:

# tunctl -t tap200
# ifconfig tap200 up

2. Create new host-side brigde:

# brctl addbr br0
# brctl addif br0 eth0
# brctl addif br0 tap200

3. Set guest to use bridged networking, bridge its NIC with tap200 host interface.
4. Boot up guest and use any network channel bandwidth test utility to test network througthput between host<=>guest.
5. Result: much more than 100MBit (approx.250MBit in my case, possible bottleneck - CPU).

Conclusion: looks like current network bridging model limits virtual NIC throughtput by the speed of physical network interface they are bridged to. It results in severe performance regression for users switching from tun/tap + host bridging model to new "one fancy click in GUI" bridging model.

#3730 duplicate Sporadic VM crashes when copying something to clipboard in guest -> duplicate of #3723 Alexey Loukianov
Description

After upgrading to VBox 2.2.0 few days ago there were about 5 guest VM crashes just in the moments when I've been copying something to clipboars in guest VM with Windows XP SP3. Crashes are sopradic, i.e. I hadn'd found a way to reproduce them, but them renders VBox almost useless for me, as it may crash guest any second minute, leaving all unsaved work lost. This issue needs to be investigated and corrected ASAP.

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