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Date:   Sun, 27 Nov 2022 12:04:09 +0100 (CET)
From:   Andreas Bergmeier <abergmeier@gmx.net>
To:     Andreas Bergmeier <abergmeier@gmx.net>
cc:     Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        linux-input@vger.kernel.org,
        USB mailing list <linux-usb@vger.kernel.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Jiri Kosina <jikos@kernel.org>, linux-leds@vger.kernel.org,
        Nestor Lopez Casado <nlopezcasad@logitech.com>
Subject: Re: Litra Glow on Linux
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On Sat, 19 Nov 2022, Andreas Bergmeier wrote:

> So after some tinkering I have code now that succeeds in retrieving stat=
e
> via sending reports once. After that all following sends time out.
> I am at a loss what I am doing wrong, tbh. RFC below.
I noticed that by default hidraw, hiddev and hid-input are loaded for
Glow. Probably because it exposes a Consumer Control page in Reports.
Is it possible that hid-input interferes with hid-logitech-hidpp?
I was trying to disable hid-input using
- HIDPP_QUIRK_NO_HIDINPUT
- hid_ignore_list

For the former it still seems to load hid-input.
For the latter it doesn't seem to load hid-logitech-hidpp.
I couldn't yet untangle all the hid driver indirections and loading.