USB device : how to prevent capture ?

Discussions about using Mac OS X guests (on Apple hardware) in VirtualBox.

USB device : how to prevent capture ?

Postby JoTaPe » 11. Jan 2019, 16:56

context : guest VBox Snow Leopard, host is High sierra 10.13.6
When the VM starts it captures all my USB devices, especially scanner, printer and external USB disks, which are no more available in the HSierra host.
How can I avoid this ?
JoTaPe
 
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Re: USB device : how to prevent capture ?

Postby socratis » 11. Jan 2019, 21:16

Remove the blank USB filter that you most probably have in your VM Settings > Ports > USB. And then do yourself a favor and read the "USB basics and troubleshooting", all of the posts. It will come in handy...
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
socratis
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Re: USB device : how to prevent capture ?

Postby JoTaPe » 12. Jan 2019, 06:39

OK, I RTFM but didn't found anything understandable for me.
Hope I will be more lucky in the forum :-)

JP
JoTaPe
 
Posts: 7
Joined: 11. Jan 2019, 16:48

Re: USB device : how to prevent capture ?

Postby JoTaPe » 12. Jan 2019, 07:22

I have read and built a filter for my USB scanner, inactivated.
Is it right to understand that a blank filter implies the capture of all the USB devices connected to the host and, if at least one filter exists (ex: my Canoscan), no device will be automatically captured but the mouse and the keyboard and the filtered device if its filter is activated ?
JoTaPe
 
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Re: USB device : how to prevent capture ?

Postby socratis » 12. Jan 2019, 09:58

JoTaPe wrote:I RTFM but didn't found anything understandable for me.
JoTaPe wrote:Is it right to understand that a blank filter implies the capture of all the USB devices connected to the host

From TFM that you read, there's the following in #4: USB Filters:
#4: USB Filters
A USB filter is a series of "AND" conditional statements. So when you're filling in the filter values, you're telling the filter:
Capture a device with this VendorID, AND that ProductID, AND ...
A blank filter (not recommended!) will match anything, which is good if the device appears as a composite, i.e. presents as a number of different devices all connected at once. However the danger of a blank filter is the potential to grab the wrong device, e.g. you do not want to grab the host's USB keyboard and assign it to the guest! If you have a problem with the wrong device being grabbed then you'll need to add just enough information to the filter so that it matches your device only. But don't define the filter too narrowly, as that can lead to problems too. That's why your safest bet for a basic filter is to fill in the VendorID and ProductID only.

So, please, do both of us a favor and re-read the thread, twice.

And if you still can't figure out what's going on, right-click on the VM in the VirtualBox Manager, select "Show in Finder". ZIP the selected ".vbox" file and attach it in your response.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
socratis
Site Moderator
 
Posts: 27690
Joined: 22. Oct 2010, 11:03
Location: Greece
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Win(*>98), Linux*, OSX>10.5

Re: USB device : how to prevent capture ?

Postby JoTaPe » 12. Jan 2019, 19:39

Hi,
I have read parts of T official FM, but your answer here in the forum looks a better one to my problem.
This official manual is not for simple users at all.
What about the second part of my assertion ?
if at least one filter exists (ex: my Canoscan), no device will be automatically captured but the mouse and the keyboard and the filtered device if its filter is activated ?

Thanks for your kind attention.

JP the only one user of VBox on a Mac in Chile ? :-)
JoTaPe
 
Posts: 7
Joined: 11. Jan 2019, 16:48

Re: USB device : how to prevent capture ?

Postby socratis » 12. Jan 2019, 20:09

JoTaPe wrote:I have read parts of T official FM, but your answer here in the forum looks a better one to my problem.
That's really interesting, because *I* am the one that wrote the FAQ, and I simply quoted the FAQ, I didn't add or subtract anything, I just highlighted some things... :roll:

JoTaPe wrote:What about the second part of my assertion ?
I do not like repeating myself, that's why I spent *a lot* of time writing the FAQ. The least you could do is spend 1/2 hour to read it properly, all the answers are there, in the #4: USB Filters section. But, please read the whole thread...
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
socratis
Site Moderator
 
Posts: 27690
Joined: 22. Oct 2010, 11:03
Location: Greece
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Win(*>98), Linux*, OSX>10.5


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