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SubjectRe: Alps touchpad generates IRQ storm after S3
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Hi Xiaojian,

> On Aug 28, 2019, at 22:43, Kai-Heng Feng <kai.heng.feng@canonical.com> wrote:
>
> Hi Mario,
>
> at 21:25, <Mario.Limonciello@dell.com> <Mario.Limonciello@dell.com> wrote:
>
>> KH,
>>
>> Just make sure I understand details.
>>
>>> Commit "HID: i2c-hid: Don't reset device upon system resume
>>
>> If you revert this it's fixed on this system?
>
> Yes. Once reset is used instead of the issue is gone.

Do you figure out the correct command to use here?

Kai-Heng

>
>>
>> In that commit you had mentioned if this causes problems it might be worth
>> quirking just Raydium but commit afbb1169ed5b58cfca017e368b53e019cf285853
>> confirmed that it helped several other systems too.
>>
>> If the conclusion from this investigation this is only fixable via touchpad FW update
>> it might be worth quirking this touchpad/touchpad FW/system combination.
>
> Hopefully there’s a better solution from ALPS :)
>
>>
>>> Also Cc Mario because this could relate to BIOS.
>>
>> Also I assume this is on current stable BIOS/EC release, right?
>
> Yes. The BIOS version is 1.10.1.
>
> The IRQ storm stops as soon as the touchpad gets touched.
>
> Kai-Heng
>
>>
>> Thanks,
>>
>>> -----Original Message-----
>>> From: Kai-Heng Feng <kai.heng.feng@canonical.com>
>>> Sent: Wednesday, August 28, 2019 1:58 AM
>>> To: Xiaojian Cao
>>> Cc: Masaki Ota; Limonciello, Mario; open list:HID CORE LAYER; Linux Kernel
>>> Mailing List; Naoki Saito
>>> Subject: Re: Alps touchpad generates IRQ storm after S3
>>>
>>>
>>> [EXTERNAL EMAIL]
>>>
>>> Hi Xiaojian,
>>>
>>> at 14:51, Xiaojian Cao <xiaojian.cao@cn.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@alpsalpine.com>
>>>> Sent: Wednesday, August 28, 2019 2:35 PM
>>>> To: 曹 曉建 Xiaojian Cao <xiaojian.cao@cn.alps.com>; Kai-Heng Feng
>>>> <kai.heng.feng@canonical.com>
>>>> Cc: Mario Limonciello <mario.limonciello@dell.com>; open list:HID CORE
>>>> LAYER <linux-input@vger.kernel.org>; Linux Kernel Mailing List
>>>> <linux-kernel@vger.kernel.org>; 斉藤 直樹 Naoki Saito
>>>> <naoki.saito@alpsalpine.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@canonical.com>
>>>> Sent: Wednesday, August 28, 2019 3:22 PM
>>>> To: 太田 真喜 Masaki Ota <masaki.ota@alpsalpine.com>
>>>> Cc: Mario Limonciello <mario.limonciello@dell.com>; open list:HID CORE
>>>> LAYER <linux-input@vger.kernel.org>; Linux Kernel Mailing List
>>>> <linux-kernel@vger.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
>
>

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