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

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Date:   Wed, 28 Aug 2019 06:51:30 +0000
From:   Xiaojian Cao <xiaojian.cao@...alps.com>
To:     Masaki Ota <masaki.ota@...salpine.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>,
        Naoki Saito <naoki.saito@...salpine.com>
Subject: RE: Alps touchpad generates IRQ storm after S3

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?

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