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Date:   Tue, 21 Nov 2023 20:09:14 +0700
From:   Bagas Sanjaya <bagasdotme@gmail.com>
To:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux Input Devices <linux-input@vger.kernel.org>,
        Thorsten Leemhuis <regressions@leemhuis.info>
Cc:     Mavroudis Chatzilazaridis <mavchatz@protonmail.com>,
        Filipe =?utf-8?B?TGHDrW5z?= <lains@riseup.net>,
        Bastien Nocera <hadess@hadess.net>,
        Jiri Kosina <jkosina@suse.cz>,
        LinuxCat <masch77.linuxcat@gmail.com>,
        Marcelo <mmbossoni@gmail.com>, Takashi Iwai <tiwai@suse.de>,
        Hans de Goede <hdegoede@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Fwd: Logitech G915 Wireless Keyboard acts weird on 6.6.0
Message-ID: <ZVyr-of1X4RudpWG@archie.me>
References: <6929ebbf-f2e0-4cd4-addc-1e33ecf3277f@gmail.com>
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Hi Thorsten and all,

On Thu, Nov 02, 2023 at 09:11:42PM +0700, Bagas Sanjaya wrote:
> Hi,
>=20
> I notice a regression report on Bugzilla [1]. Quoting from it:
>=20
> > Hello,
> > After upgrading from 6.5.9 to 6.6.0, my keyboard started acting really =
weird in its wireless mode, key actions sent are completely wrong, see vide=
o attached.=20
> >=20
> > Most keys are perceived as either E, 3 or F7, with F8 and <, as well.=
=20
> >=20
> > Modifier keys (CTRL, ALT, ALT GR, Shift and Super) are working normally=
, as well as media control keys (pause/play, previous, next, mute and sound=
 up/down).
> >=20
> > The keyboard works as expected if it's wired.
>=20
> Another reporter bisected the regression:
>=20
> > Bisected to=20
> >=20
> > 9d1bd9346241cd6963b58da7ffb7ed303285f684 is the first bad commit
> > commit 9d1bd9346241cd6963b58da7ffb7ed303285f684
> > Author: Mavroudis Chatzilazaridis <mavchatz@protonmail.com>
> > Date: Sun Jul 16 18:23:44 2023 +0000
> >=20
> > HID: logitech-dj: Add support for a new lightspeed receiver iteration
> >=20
> > The lightspeed receiver for the Pro X Superlight uses 13 byte mouse rep=
orts
> > without a report id. The workaround for such cases has been adjusted to
> > handle these larger packets.
> >=20
> > The device now reports the status of its battery in wireless mode and
> > libratbag now recognizes the device and it can be configured with Piper.
> >=20
> > https://github.com/libratbag/libratbag/pull/1122
> >=20
> > Co-developed-by: Filipe La=C3=ADns <lains@riseup.net>
> > Signed-off-by: Filipe La=C3=ADns <lains@riseup.net>
> > Signed-off-by: Mavroudis Chatzilazaridis <mavchatz@protonmail.com>
> > Reviewed-by: Bastien Nocera <hadess@hadess.net>
> > Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> >=20
> > drivers/hid/hid-ids.h | 1 +
> > drivers/hid/hid-logitech-dj.c | 11 ++++++++---
> > 2 files changed, 9 insertions(+), 3 deletions(-)
>=20
> See Bugzilla for the full thread.
>=20
> Anyway, I'm adding this regression to regzbot:
>=20
> #regzbot introduced: 9d1bd9346241cd https://bugzilla.kernel.org/show_bug.=
cgi?id=3D218094
> #regzbot title: Logitech G915 Wireless Keyboard key event only detects fe=
w key codes
> #regzbot link: https://streamable.com/ac6l8u
>=20

There's no reply from culprit author nor linux-input people (did they miss
this regression?). And on Bugzilla, other reporters replied that reverting
the culprit fixed the regression.

FYI, there's similar Bugzilla report on [1].

Also Cc'ed Linus.

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=3D218172

--=20
An old man doll... just what I always wanted! - Clara

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