From: Jiri Kosina <jikos@kernel.org>
To: Hui Wang <hui.wang@canonical.com>
Cc: linux-input@vger.kernel.org, benjamin.tissoires@redhat.com
Subject: Re: [PATCH 2/2] HID: i2c-hid: Add a quirk to keep the power in shutdown
Date: Thu, 7 Jan 2021 10:12:07 +0100 (CET) [thread overview]
Message-ID: <nycvar.YFH.7.76.2101071011130.13752@cbobk.fhfr.pm> (raw)
In-Reply-To: <20201204152912.151604-2-hui.wang@canonical.com>
On Fri, 4 Dec 2020, Hui Wang wrote:
> On the latest Thinkpad Yoga laptop, the touchscreen module is wacom
> I2C WACF2200 (056a:5276), we found the touchscreen could not work
> after rebooting, needs to poweroff the machine then poweron the
> machine to let it work.
>
> It is highly possible that this is a BIOS issue, but the windows
> doesn't have this problem with the same BIOS.
>
> If keeping the power on when calling shutdown, the touchscreen could
> work after rebooting. Let us add a quirk for it and apply the quirk
> to this machine only.
I wonder what do Windows do differently here. Perhaps they never put the
i2c device to sleep while in shutdown anyway? Is there any downside to
(not) doing the same?
Thanks,
--
Jiri Kosina
SUSE Labs
next prev parent reply other threads:[~2021-01-07 9:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 15:29 [PATCH 1/2] HID: i2c-hid: expand the quirk lookup table to support dmi_table Hui Wang
2020-12-04 15:29 ` [PATCH 2/2] HID: i2c-hid: Add a quirk to keep the power in shutdown Hui Wang
2021-01-07 9:12 ` Jiri Kosina [this message]
2021-01-07 11:46 ` Hui Wang
2021-01-08 15:01 ` Jiri Kosina
2021-01-26 8:57 ` Hui Wang
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