Re: [PATCH] HID: logitech-hidpp: fix hi-res scroll for Bolt-connected MX Master

[Benjamin Tissoires <bentiss@kernel.org>]

On Sep 04 2026, Erik Håkansson wrote:
> Hi!
> Is this the same issue as in
> https://lore.kernel.org/linux-input/20260901-bolt-scroll-fix-v1-1-58bca7ae487f@protonmail.com/
> The symptoms seem similar at least, and if so the approach to fixing
> it in that case is to simply treat Bolt devices like previous DJ
> devices, rather than having special treatment for Bolt.
> Can you who have Bolt mice maybe test that patch too to see if it
> solves the same issue?

FWIW, my initial decision a few years back when Bolt was introduced was
to not include it in the kernel, because there are too many things it's
missing, the most problematic one being that we don't know which device
sends which event.

So basically, there is a chance that the driver sets high-resolution
scrolling on a bolt device, when 2 mice are connected, and one is
capable of it and the other is not. This is unlikely to happen, but is
hard to solve in the kernel.

So I'm happy to wait for testing and patches, but I would also like a
conclusion where bolt doesn't belong to the kernel, and we just revert
the inclusion of the receiver in the dj driver.

Cheers,
Benjamin