Re: [PATCH RFC 0/4] HID: logitech: add Bolt support with HID++ input handling

[Oleksandr Natalenko <oleksandr@natalenko.name>]

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Hello.

On pátek 2. října 2026 0:23:34, středoevropský standardní čas Erik Håkansson wrote:
> The following items need to be tested:
> 1. First and foremost, the 16-bit descriptor finding was based on looking
>    at the native descriptor from the Bolt receiver and not something I
>    could test myself without a Bolt mouse.
>    Hence, just regular mouse movement needs to be verified with a few
>    different devices.

I'm using MX Master 4 mouse. So far, the cursor moves as expected.

> 2. Further, scrolling with a 0x2121-supporting device (i.e. high-resolution
>    scrolling) needs to be tested with Solaar set to all four combinations
>    of HID++ diversion + resolution, and all four combinations of HID++
>    diversion + scroll direction inversion.

As far as I can tell, things do not break if I play with these switches, the high-res scrolling is working for me.

> 3. MX Master 4 thumbwheel (0x2150, or any other mouse with this), diversion
>    on and off in Solaar.

Yeah, diversion enables high-res horisontal scrolling, I suppose? If I enable it, the scrolling is smoother.

> 4. M650 Back/Forward clicks when connected over Bolt.

Can speak for MX Master 4, these clicks work.

> 5. Ratchet wheel (0x2130, I think Signature M650 and M750 support this,
>    from issue reports online) with diversion on and off in Solaar.

Enabling/disabling magnetic mechanism for the ratchet wheel on MX Master 4 works.

> 6. For all devices, testing so everything works after turning off and on,
>    after reconnecting, after reboot, after switching to Bluetooth and back.

So far so good, but I'm going to give it more time to see how it behaves in daily usage.

> 7. There was previously one report of scrambled keyboard input for a Logi
>    POP Icon Keys when letting the keyboard interface be claimed by the DJ
>    driver. This issue was never traced to a root cause and may have been
>    unrelated. It has not been replicated on MX Keys. It should be retested.

On my MX Keys S so far no difference, things just work.

Please let me know if I should test something specific.

Thank you.

-- 
Oleksandr Natalenko, MSE

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