linux-kernel - Re: [Regression] Logitech BT mouse unusable after commit 532223c8ac57 (still in 6.1-rc8)

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Date:   Wed, 7 Dec 2022 18:44:40 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Bastien Nocera <hadess@...ess.net>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Filipe Laíns <lains@...eup.net>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Thorsten Leemhuis <regressions@...mhuis.info>
Subject: Re: [Regression] Logitech BT mouse unusable after commit 532223c8ac57
 (still in 6.1-rc8)

On Wed, Dec 7, 2022 at 6:19 PM Bastien Nocera <hadess@...ess.net> wrote:
>
> On Wed, 2022-12-07 at 12:07 +0100, Rafael J. Wysocki wrote:
> > # hidpp-list-features /dev/hidraw1
> > Bluetooth Mouse M336/M337/M535 (046d:b016) is a HID++ 4.5 device
> > Feature 0x01: [0x0001] Feature set
> > Feature 0x02: [0x0003] Device FW version
> > Feature 0x03: [0x0005] Device name
> > Feature 0x04: [0x0020] Reset
> > Feature 0x05: [0x1e00] Enable hidden features (hidden)
> > Feature 0x06: [0x1800] Generic Test (hidden, internal)
> > Feature 0x07: [0x1000] Battery status
> > Feature 0x08: [0x1b04] Reprog controls v4
> > Feature 0x09: [0x2100] Vertical scrolling
> > Feature 0x0a: [0x2200] Mouse pointer
> > Feature 0x0b: [0x2205] Pointer speed
> > Feature 0x0c: [0x18b1] ? (hidden, internal)
> > Feature 0x0d: [0x2121] Hi-res wheel
> > Feature 0x0e: [0x1f03] ? (hidden, internal)
>
> Would you be able to enable debugging for the hid subsystem to get some
> debug data when getting the version from the device fails?

I guess I could, but I think that the device is just quirky.

At least the BT layer appears to think that it is connected.

Anyway, what exactly do you need?

> I can't see any problems in there that wouldn't also have impacted all
> the other Logitech Bluetooth devices listed in the support devices
> list.
>
> If the problem is a timeout, maybe we should lower the timeouts we
> currently have (5*HZ = 5 seconds, right?), so we can retry 5 times one
> second instead.

No, it doesn't take 5 sec to get a response from it.  It rather looks
like __hidpp_send_report() returns an error.

>
> Still, as I mentioned earlier, I can't reproduce the problem on another
> Bluetooth Classic device...