I have a digital multimeter that logs data to computer through USB serial. After upgrade to Big Sur it suddenly stopped working. IOKit properly detects device connect/disconnect and HID reports are coming in, but with no data. HID report contains nothing but zeroes...
I'm stuck and in need of help. Have anything changed in IOKit.hid interface between 10.15 and 11?
ejeklint
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
From
Stockholm, Sverige
Post
Replies
Boosts
Views
Activity
I'm writing a IOKit USB HID based driver for a digital multimeter.
After update to 10.15.7, macos will no longer reconnect the device after cable is unplugged/reinserted. A reboot is needed to get the device reconnected again, but after next unplugging it refuses to reconnect again.
This has worked just fine until 10.15.7... Any ideas on how to fix?
EDIT: It still works, but it takes around 2 minutes for macOS to detect that device is plugged in again.