https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295839
Bug ID: 295839
Summary: Keyboard remains in K_RAW mode after being detached
from kbdmux
Product: Base System
Version: 15.1-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
When a new USB keyboard is connected to the system, kbdmux innediately grabs it
and switches into K_RAW mode:
----------------kbdmux.c------------------------
case KBADDKBD: /* add keyboard to the mux */
[.............]
mode = K_RAW;
error = kbdd_ioctl(k->kbd, KDSKBMODE, (caddr_t)&mode);
[.............]
------------------------------------------------
However, when the user detaches that keyboard from kbdmux by doing
kbdcontrol -A hkbd0 < /dev/kbdmux0
kbdmux does not switch that keyboard to "normal" mode; it remains in K_RAW mode
and cannot be used normally.
One use case for this is one computer used by 2 people, each with their own
keyboard and monitor.
Another is devices that present themselves as HID keyboards, one such example
being a barcode scanner.
Desired behavior:
* Option 1: upon detaching the keyboard from kbdmux, it is returned into
"normal" mode;
* Option 2: add capability to switch a keyboard into the desired mode to
kbdcontrol utility.
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