linux-kernel - Re: High load from process irq/65-i2c-INT3

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Date:   Sat, 1 Aug 2020 06:55:10 +0200
From:   Jürgen Stauber <j.stauber@...oud.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: High load from process irq/65-i2c-INT3 - kernel module tps6598x

Hi Heikki,

unfortunately I didn’t find any UCMCx option within the UEFI bios. 

kr,
Jürgen

> On 28.07.2020, at 14:32, Heikki Krogerus <heikki.krogerus@...ux.intel.com> wrote:
> 
> Hi Jürgen,
> 
> I'm sorry about the late reply (vacation).
> 
>> On Mon, Jul 20, 2020 at 06:31:04PM +0200, Jürgen Stauber wrote:
>> Hi all,
>> 
>> I was made aware in the following launchpad bug report, that I should report
>> the issue directly with the upstream maintainers:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1883511
>> <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1883511>
>> 
>> As mentioned in the report, I experience high cpu load due to an interrupted
>> irq/65-i2c-INT3 process. A short fix is to unload the kernel module tps6598x.
>> 
>> Please be lenient with me, since I’ve got no glue whether I’m doing this
>> correctly.
>> 
>> In case you need more details/logs/information, please let me know.
> 
> There is one thing that you may be able to try. If you can enter the
> BIOS menu, then you should be able to disable an option called
> "UCMCx". Unfortunately I don't know the full path to that option in
> the BIOS menu of the NUC, or is entering the BIOS menu possible in the
> first place. It is also possible that there is no option "UCMCx" at
> all.
> 
> Unfortunately I don't have access to NUC10 at the moment, but I'll try
> get one.
> 
> Br,
> 
> -- 
> heikki