linux-kernel - Re: Alps touchpad generates IRQ storm after S3

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Message-Id: <A118551C-A0D9-485F-91F7-44A5BE228B99@canonical.com>
Date:   Wed, 28 Aug 2019 14:58:12 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Xiaojian Cao <xiaojian.cao@...alps.com>
Cc:     Masaki Ota <masaki.ota@...salpine.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Naoki Saito <naoki.saito@...salpine.com>
Subject: Re: Alps touchpad generates IRQ storm after S3

Hi Xiaojian,

at 14:51, Xiaojian Cao <xiaojian.cao@...alps.com> wrote:

> Hi Ota-san,
>
> OK, we will look into it.
>
>
> Hi Kai-Heng,
>
> We will try to reproduce this issue first, could you please tell me the  
> target Ubuntu version?

It’s distro-agnostic, any distro with mainline Linux can reproduce the issue.

Kai-Heng

>
> Best regards,
> Jason
>
> -----Original Message-----
> From: 太田 真喜 Masaki Ota <masaki.ota@...salpine.com>
> Sent: Wednesday, August 28, 2019 2:35 PM
> To: 曹 曉建 Xiaojian Cao <xiaojian.cao@...alps.com>; Kai-Heng Feng  
> <kai.heng.feng@...onical.com>
> Cc: Mario Limonciello <mario.limonciello@...l.com>; open list:HID CORE  
> LAYER <linux-input@...r.kernel.org>; Linux Kernel Mailing List  
> <linux-kernel@...r.kernel.org>; 斉藤 直樹 Naoki Saito  
> <naoki.saito@...salpine.com>
> Subject: RE: Alps touchpad generates IRQ storm after S3
>
> Hi, Kai-Heng,
>
> Sorry, I'm not in charge of Linux task now.
>
> Hi, XiaoJian,
>
> Please check the following mail.
> If you have any question, please ask Kai-Heng.
>
> Best Regards,
> Masaki Ota
> -----Original Message-----
> From: Kai-Heng Feng <kai.heng.feng@...onical.com>
> Sent: Wednesday, August 28, 2019 3:22 PM
> To: 太田 真喜 Masaki Ota <masaki.ota@...salpine.com>
> Cc: Mario Limonciello <mario.limonciello@...l.com>; open list:HID CORE  
> LAYER <linux-input@...r.kernel.org>; Linux Kernel Mailing List  
> <linux-kernel@...r.kernel.org>
> Subject: Alps touchpad generates IRQ storm after S3
>
> Hi Masaki,
>
> The Alps touchpad (044E:1220) on Dell Precision 7530 causes IRQ storm  
> after system suspend (S3).
> Commit "HID: i2c-hid: Don't reset device upon system resume” which solves  
> the same issue for other vendors, cause the issue on Alps touchpad.
> So I’d like to know the correct command Alps touchpad expects after  
> system resume.
>
> Also Cc Mario because this could relate to BIOS.
>
> Kai-Heng