pqrs-org/Karabiner-Elements

Driver deactivates upon reboot

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#2503 opened on Nov 10, 2020

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Description

I am unsure if this is a duplicate or related to #2473, feel free to close if it is. In my case, the procedure for deactivating/rebooting/activating/permitting the driver works. I can use the software. Unfortunately, when I reboot the machine the driver no longer works. Clicking Activate brings a message that activation was successful immediately, without having to repermission it in system preferences. Unfortunately, it does not work.

The workaround is to deactivate it and, without rebooting, activate it again, which forces the permissioning stage.

These log messages may be of interest:

[2020-11-10 12:07:57.185] [error] [observer] grabber_client error: Connection reset by peer
[2020-11-10 12:07:57.185] [info] [observer] grabber_client is closed.
[2020-11-10 12:07:58.187] [info] [observer] grabber_client is connected.
[2020-11-10 12:07:58.187] [info] [observer] rescan devices...
[2020-11-10 12:08:00.513] [info] [console_user_server] receiver is initialized
[2020-11-10 12:08:00.562] [info] [console_user_server] receiver: bound
[2020-11-10 12:08:00.562] [info] [console_user_server] grabber_client is started.
[2020-11-10 12:08:00.563] [info] [console_user_server] grabber_client is connected.
[2020-11-10 12:08:01.006] [info] [grabber] karabiner_console_user_server is connected.
[2020-11-10 12:08:01.006] [info] [grabber] console_user_server_client is connected. (uid:501)
[2020-11-10 12:08:01.010] [info] [grabber] device_grabber is started.
[2020-11-10 12:08:01.034] [info] [grabber] event_tap_monitor initialized
[2020-11-10 12:08:01.034] [info] [grabber] Load /Users/someone/.config/karabiner/karabiner.json...
[2020-11-10 12:08:01.036] [info] [grabber] core_configuration is updated.
[2020-11-10 12:08:01.038] [info] [grabber] virtual_hid_device_service_client_ connected
[2020-11-10 12:08:01.038] [info] [virtual_hid_device_service] io_service_client::async_start
[2020-11-10 12:08:01.074] [info] [console_user_server] Load /Users/someone/.config/karabiner/karabiner.json...
[2020-11-10 12:08:01.093] [info] [console_user_server] core_configuration is updated.
[2020-11-10 12:08:01.094] [info] [grabber] `system_preferences` is updated.
[2020-11-10 12:08:01.366] [info] [console_user_server] Check for updates...
[2020-11-10 12:08:02.011] [warning] [virtual_hid_device_service] driver_version_ is mismatched: client expected: 10300, actual dext: std::nullopt
[2020-11-10 12:08:02.061] [info] [grabber] caps lock is found on KB800HM Kinesis Freestyle2 for Mac
[2020-11-10 12:08:02.061] [warning] [grabber] virtual_hid_keyboard is not ready. Please wait for a while.
[2020-11-10 12:08:02.062] [info] [grabber] caps lock is found on AC800HPB Kinesis Freestyle 2 Keypad
[2020-11-10 12:08:03.010] [warning] [virtual_hid_device_service] driver_version_ is mismatched: client expected: 10300, actual dext: std::nullopt
[2020-11-10 12:08:04.010] [warning] [virtual_hid_device_service] driver_version_ is mismatched: client expected: 10300, actual dext: std::nullopt
[2020-11-10 12:08:05.012] [warning] [virtual_hid_device_service] driver_version_ is mismatched: client expected: 10300, actual dext: std::nullopt
[2020-11-10 12:08:06.012] [warning] [virtual_hid_device_service] driver_version_ is mismatched: client expected: 10300, actual dext: std::nullopt
...

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Knowledge of macOS driver architectureC++ programmingUnderstanding of Karabiner Elements structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
Investigate why the driver version is mismatched after reboot. Focus on the virtual hid device service component and how it initializes the driver version. Check if there is a race condition in the startup sequence or missing persistence of version state. Review the relevant source files: src/virtual hid device service/ and src/grabber/ for comparison logic.