ALVA HID keyboard input simulation setting is not remembered across reconnects #20455

Brief summary

Every time I use the BC640 device, I have to manually switch this option whenever I reconnect.

Steps to reproduce

1. Connect an Optelec ALVA 6 series display, such as an ALVA BC640 / BC680 / 640 Comfort.
2. In NVDA, open Settings -> Braille.
3. Uncheck "HID keyboard input simulation" for the ALVA display.
4. Confirm that the setting works for the current NVDA session. For example, NVDA's braille input table is used after HID keyboard simulation is disabled.
5. Disconnect and reconnect the display, or restart NVDA and reconnect the display.
6. Open Settings -> Braille again.

Actual behavior

"HID keyboard input simulation" is checked again after reconnecting / restarting NVDA, even though the user previously unchecked it.

The setting works during the current session, but the user's explicit choice is not remembered.

Expected behavior

After the user explicitly changes "HID keyboard input simulation" in NVDA's Braille settings, NVDA should remember and restore that choice for the ALVA driver on future connections.

This should not change the default behavior for users who have never changed the setting. If no saved value exists, NVDA can continue to reflect the display's current state.

NVDA logs, crash dumps and other attachments

I can provide an NVDA log if needed.
But this issue doesn't seem to need logs to explain anything; I've already done some investagate on it.

NVDA type

installed copy, portable copy, installer/launcher copy, source copy

NVDA version

2026.1

Have you tried any other versions of NVDA? If so, please report their behaviors.

Version 2025.1, and even earlier versions, are the same.

Windows version

Windows 10 22H2 (AMD64) build 19045.7417

Name and version of other software in use when reproducing the issue

Optelec ALVA 6 series display.(BC640)

Other information about your system

This was observed with an ALVA display where disabling HID keyboard simulation works for the current session.

Related background:

• PR Native driver for Optelec ALVA 6 displays with support for raw braille input and the Optelec protocool converter #7884 introduced the native ALVA driver and raw braille input support:
  Native driver for Optelec ALVA 6 displays with support for raw braille input and the Optelec protocool converter #7884
• In PR Native driver for Optelec ALVA 6 displays with support for raw braille input and the Optelec protocool converter #7884, maintainers decided not to force raw input by default because doing so would change a setting inside the display without the end user knowing:
  Native driver for Optelec ALVA 6 displays with support for raw braille input and the Optelec protocool converter #7884 (comment)
• This issue is different: it only asks NVDA to remember a setting after the user explicitly changed it.
• Issue ALVA 640 Comfort drivers need updating #9652 is related because disabling HID keyboard input allowed ALVA 640 Comfort braille input to use NVDA's braille input system:
  ALVA 640 Comfort drivers need updating #9652 (comment)

Does the issue still occur after restarting your computer?

I have restarted my computer and the issue still occurs

If NVDA add-ons are disabled, is your problem still occurring?

I have restarted NVDA with add-ons disabled and the issue still occurs

Does the issue still occur after you run the System Accessibility Repair Tool (COM Registration Fixing Tool in older versions) in NVDA's tools menu?

I have run the System Accessibility Repair Tool and the issue still occurs