Giorgi-G.

[Giorgi-G.]

Hi,

Do you have Linux on both sides? If yes – try to install the required on the article packages and just simply re-install NM. It will build nxusb.ko during the installation.

You can also manually check that on both machines nxusb.ko is built and exists on the path /usr/NX/bin/drivers/nxusb.ko

Also, worth mentioning that the problem could be on any of both sides.

[Giorgi-G.]

Hi,

First of all “USB device forwarding” and “USB Drive connecting” are completely different modules and work independently.

After uninstallation of the previous NoMachine, you need to restart the machine, even better twice, to hint the Windows OS that drivers are removed and that’s a correct setting. After that, it will save a new configuration and you can install the latest NoMachine.

[Giorgi-G.]

Hi,

Please accept our apologies for this issue. USB devices forwarding from MacOS Big Sur is not supported yet, but our development team is working on adding it, and soon we will release an update that will fix this issue.

 

[Giorgi-G.]

Hi,

Windows side logs look good, and the USB forwarding module works well on that side.

Most probably you have some issue with the remote, Linux side. Please check this article: https://www.nomachine.com/AR12J00658

As well as please attach logs from the Linux side if possible.

[Giorgi-G.]

Hi,

Regarding Windows.

The UsbDk in upperfilters also might cause some problems on Windows side, just try to remove the program that added it, or remove only that key from upperfilters and check does it appears back after machine restart.

Regarding Mac.

The “one side forwarding” issue was caused by VirtualHere on my Mac machine. I fixed it by the following way.

1. I have installed back VirtualHere.

2. Via command line I uninstalled it by the proper way:

2.1 Run this command (I runned it 2 times, first it installed drivers and second time in uninsalled them)

sudo /Applications/VirtualHereServer.app/Contents/MacOS/vhusbdosx -b

2.2. After. run this command and restart machine:

sudo /Applications/VirtualHereServer.app/Contents/MacOS/vhusbdosx -u

2.3 After restart run these commands:

sudo kextunload -b com.virtualhere.vhusbd

sudo chmod -R  777 /Library/Extensions/vhusbd.kext

sudo rm -rf  /Library/Extensions/vhusbd.kext

After restart the machine, and NoMachine’s USB forwarding should work proper way.

 

 

[Giorgi-G.]

Meanwhile, I made some tests with VirtualHere on my Windows machine, and looks like, I can forward a device from the Windows to Mac (when Mac is a client), and from the Mac to Windows forwarding do not work.
That’s probably because VirtualHere leaves some registered resources after it’s uninstallation. I’m investigating this issue.

Can you confirm that behavior (one direction forwarding) on your side?

[Giorgi-G.]

1. In the file log/nxusbd.log I see a couple of more lines comparing with your previous log. It’ most probably appeared before you were able to delete that kext. But to be sure, could you please delete this file and try to reproduce it few more times?

2. I assume we have a similar problem on the Windows side.

Could you please check this registry key on Windows:

 Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36fc9e60-c465-11cf-8056-444553540000}\UPPERFILTERS 

Do you see there something like DCV_USB_HUB_FILTER ? Or it’s the only nxusbf here?

[Giorgi-G.]

Hi,

I have found an issue with your Mac logs. It’s definitely about conflicting software KEXT loaded the same time as NM’s KEXTs are loaded.

To be sure it’s a VirtualHere, I just installed it on our test Mac and were able to reproduce the same behavior and logs at our lab.

Just run this command at your Mac’s terminal

kextstat | grep usb | grep -v “apple” 

And if you see here anything but NoMcahine’s KEXTs – that might be a problem.

Even after manual stopping of VirtualHere and machine restart I still had VirtualHere’s driver loaded into the system:

0xffffff7f853f0000 0x4000     0x4000     com.virtualhere.vhusbd (2.3.1) 520E80E7-44CE-3AFF-949D-291C7E817174 <59 6 5 3 1>

So even having it installed, but not running may be a reason for issues (constant and not).

The worst thing is that if you remove VirtualHere from Applications its driver will still remain in the system even after a restart of the machine.

So to completely remove it you need to run the following commands in the terminal with admin rights:

sudo kextunload -b com.virtualhere.vhusbd

sudo /Applications/VirtualHereServer.app/Contents/MacOS/vhusbdosx -b uninstall

sudo /Applications/VirtualHereServer.app/Contents/MacOS/vhusbdosx -u

sudo rm -rf /Applications/VirtualHereServer.app/

sudo rm -rf /Library/Extensions/vhhcd.kext

 

After restart com.virtualhere.vhusbd were not loaded anymore, and NoMachine forwarding worked again.

 

[Giorgi-G.]

Hi,

1.  Can you please check do you have any conflicting software from those list AR04Q01027 installed on any machine?

2. Or maybe any other heave software that consumes huge resources of CPU and/or network?

3. Can you please check the network ping time, is it constantly below 20ms and there are no spikes upper than 200ms?

4.

 It will always be after being disconnected for a while, ill come back to it not working anymore.

Have you tried to restart both machines and try again? Does it work?

5. What type of device you are forwarding?

6. If it will appear, you can collect logs and pass them to us. Collect them with an open session (with failed device forwarding). To collect logs from both sides use these articles: AR10K00697 and DT10O00163

[Giorgi-G.]

Hi,

Could you please tell us more details:

1. What machine (Win on Mac) is under a private VPN?

2. You connect with SSH or NM protocol?

3. Is the protocol’s corresponding port (22 for SSH and 4000 for NM), or maybe some custom, open in your VPN network?

4. Is that always reproducible (USB forwarding does not work) if you are connected through a VPN?

[Giorgi-G.]

Hi Steve,

Sorry for belated reply.

No, as mentioned it will be released “one after next” release, so it’s not included in the current 6.12.3 version. I will prepare for you a 6.12.3 version with the mentioned patch this week and provide it to you.

 

[Giorgi-G.]

Hi Steve, Mike,

I can confirm that this issue is fixed and will be released one release after the next (current release is 6.11.2). If you need a patched package with the fix, please don’t hesitate to ask and we will provide it before the official release.

[Giorgi-G.]

Hi Mike, yes, that’s a reason. So for now we try to make it work even if Universal Serial Bus Controllers drivers are missing.

[Giorgi-G.]

Hi,

Have you accepted NoMachine USB drivers (kexts) installation in the security settings of OS?

As well as, do you see both local and remote USB devices in the USB forwarding panel?

[Giorgi-G.]

Hi Steve,

Thanks for the provided info. I can confirm that we reproduced your issues on the same type of VM. Currently, we are focused on it’s fixing. I will share an update on the progress on this topic.

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