USB Error: (iokit/common) exclusive access and device already open
apexJCL opened this issue · 14 comments
System information:
- macOS Ventura v13.0.1
- Apple M1 Pro
I get this error whenever I try to launch the application after the setup screens.
I've tried removing the app but to no avail.
Any clues/suggestions?
Are you running the latest version of Komplete Synthesia (v0.50 release)?
Assuming you are. Before starting KompleteSynthesia.app, please run the following in your terminal:
ps aux |grep NIHardware
ps aux |grep NIHost
ps aux |grep NTK
Then start KompleteSynthesia, try the same three steps again after having started KompleteSynthesia.
Let me know what you saw.
Right now I am assuming some Native Instruments service was still blocking the access to the USB interface, needed for transferring image data to those screens. KompleteSynthesia tries to identify those services when starting and tries to kill them before accessing the USB device. Maybe that fails for you somehow.
I did in fact already find at least one bug in the relevant code by now - namely the NTKDaemon would not be treated correctly. Is it by any chance that one that is running on your machine and blocks access?
ps aux |grep NIHardware
ps aux |grep NIHost
ps aux |grep NTK
Please let me know what those commands did when run in your Terminal.app.
It seems there's both NIHardware and NIHostIntegrationAgent processes running in the background:
➜ ~ ps aux |grep NIHardware
ps aux |grep NIHost
ps aux |grep NTK
carlos 636 0.0 0.1 409942544 22240 ?? S Sat11AM 0:05.60 /Library/Application Support/Native Instruments/Hardware/NIHardwareAgent.app/Contents/MacOS/NIHardwareAgent
carlos 36039 0.0 0.0 408626880 1296 s000 S+ 7:40AM 0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox NIHardware
carlos 632 0.0 0.2 409946528 29136 ?? S Sat11AM 0:56.89 /Library/Application Support/Native Instruments/Hardware/NIHostIntegrationAgent.app/Contents/MacOS/NIHostIntegrationAgent
carlos 36041 0.0 0.0 408626880 1296 s000 S+ 7:40AM 0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox NIHost
carlos 36043 0.0 0.0 408626880 1296 s000 S+ 7:40AM 0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox NTK
Those are the problem - if you killed them manually
killall -9 NIHardwareAgent
killall -9 NIHostIntegrationAgent
then restart KompleteSynthesia -> it should be better now.
Now question is why they dont get killed by KompleteSynthesia as intended? Guess I need to do some more research...
And don't worry - killing them won't be an issue. You can either manually restart them after KompleteSynthesia was terminated, or you can just relog into your macOS user, that'll restart them as well.
For restarting them manually, run the following in your terminal:
open "/Library/Application Support/Native Instruments/Hardware/NIHostIntegrationAgent.app"
open "/Library/Application Support/Native Instruments/Hardware/NIHardwareAgent.app"
The idea was the KompleteSynthesia does exactly that.
on startup:
- identify if any of those three processes was running
- kill all of them
on shutdown:
- restart those that ran when starting
In any case, thanks for letting me know about that problem, Jose - I will fix that issue, it just may take a few attempts and a bit of patience. Would be great if I found a way to reproduce it....
Also, please give 0.51 a try - some changes in there that might do the trick for you - without manual intervention.
I had to manually kill both processes but after doing so, it worked!
Thanks for the quick response ❤️
Glad that worked.
With 0.51, when starting without doing anything extra, what happens? I wonder if that process killing and waiting for it to be truly gone was doing the job now or not.
Thanks again for your help in getting this problem solved!
It is not waiting for the process to be killed, it just throws the same error as before.
I'm not too familiar with Objective-C so I can't help (for now).
Really, the same error?
So it says "exclusive access..." blah --- it does NOT say "Failed to terminate ..."?
Screen.Recording.2023-02-07.at.7.56.21.mp4
oh wow - that is very helpful indeed - I had not considered it behaving like that. We are onto something....
Just tested and everything seems to be working just fine (both at open and closing the app).
Excellent work, highly appreciated 🙏🏼