linux-kernel - Re: Possible regression: sluggish inputs

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Date:	Mon, 12 May 2014 15:26:21 +0200
From:	tbilles@....com
To:	"Hans de Goede" <hdegoede@...hat.com>,
	"Zhang Rui" <rui.zhang@...el.com>, "Len Brown" <lenb@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Aaron Lu" <aaron.lu@...el.com>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Possible regression: sluggish inputs

Hi,

On Saturday, 03 May 2014 at 20:14:03, Hans de Goede wrote:
>On 05/03/2014 07:38 PM, tbilles@....com wrote:
>> On Saturday, 03 May 2014 at 10:00:38, Hans de Goede wrote:
>>
>>> I've seen this happen occasionally on my E6430 both with and without
>>> the patch the bisect points too. I can trigger it by pressing
>>> brightness up / down as fast as I can. Likely the dimming on
>>> inactivity code is doing a much better job at sending brightness
>>> change commands as fast as possible, making it easier to trigger this.
>>> As for the commit you've bisected it too, it may be that that subtly
>>> changes things to make the problem easier to trigger, 
>> 
>> I don't have auto screen dimming enabled, but there could be something
>> else triggering it. Other than this, it all makes sense. The brightness
>> up / down buttons always act slowly for me. I can too trigger the sluggish
>> behaviour by pressing the brightness up or down buttons fast and
>> simultaneously moving the mouse. So yes, your patch is not the cause
>> of this, but for some reason it makes it easier to trigger. 
>> 
>>> but I distinctly remember having the same issue before I wrote that
>>> patch.
>> 
>> Let me try this 'your patch reverted on top of 3.14.2' kernel for a few
>> days to see if this behaviour shows up. Maybe I had it too, I just
>> didn't notice, because it was less frequent.

I didn't notice this behaviour since then, but I guess that doesn't prove
it's not there. 

I will continue using my 3.13.x kernel for the time being.

Thank you, Hans, for your time.

Tibor
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