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[81.224.151.184]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c2a3590afccsm219473766b.62.2026.09.20.14.24.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 20 Sep 2026 14:24:12 -0700 (PDT) Message-ID: <9318fed0-31c0-4991-9f57-a1cabeeebcd9@gmail.com> Date: Sun, 20 Sep 2026 23:24:10 +0200 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [REGRESSION 7.3-rc1] HID: logitech-hidpp: hi-res scroll mode forcibly re-enabled on every reconnect for Bolt devices, overriding userspace To: Roman Stingler , Lovekesh Solanki Cc: Jiri Kosina , Benjamin Tissoires , Filipe Lains , Bastien Nocera , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev References: <20260920094508.39682-1-roman.stingler@gmail.com> <20260920205058.11958-1-roman.stingler@gmail.com> Content-Language: en-US From: =?UTF-8?Q?Erik_H=C3=A5kansson?= In-Reply-To: <20260920205058.11958-1-roman.stingler@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi! > Possibly related > ================ > > On this same Bolt topology the wheel also scrolls far too far per detent, > apparently because hid-logitech-dj does not forward the hi-res wheel reports > to hid-logitech-hidpp, so the multiplier-15 steps reach userspace unscaled. > There is an out-of-tree DKMS workaround for exactly this WPID: > > https://github.com/Magnetar-OS/logitech-bolt-hidpp-dkms > > I am reporting only the mode-reset problem here, but the two look like > neighbouring consequences of the same commit and may be worth considering > together. There are two different patches that aim to solve this, but it looks like the dkms fix is a bit more robust. https://lore.kernel.org/linux-input/20260901-bolt-scroll-fix-v1-1-58bca7ae487f@protonmail.com/ https://lore.kernel.org/linux-input/20260904034843.1340846-1-rafael@rcpassos.me/ I think the best approach would probably be to apply Rafael's patch and see if there's anything from the dkms patches that's worth including too. Regards, Erik