linux-kernel - Re: [PATCH 3/3] i8k: Remove laptop specific config data (fan_mult, fan

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Date:	Thu, 18 Dec 2014 12:11:57 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Steven Honeyman <stevenhoneyman@...il.com>
Cc:	Guenter Roeck <linux@...ck-us.net>, Arnd Bergmann <arnd@...db.de>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	Jean Delvare <jdelvare@...e.de>,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Jochen Eisinger <jochen@...guin-breeder.org>,
	linux-kernel@...r.kernel.org, Valdis.Kletnieks@...edu
Subject: Re: [PATCH 3/3] i8k: Remove laptop specific config data (fan_mult, fan_max) from driver

On Wednesday 17 December 2014 19:20:21 Steven Honeyman wrote:
> On 17 December 2014 at 17:54, Pali Rohár <pali.rohar@...il.com> 
wrote:
> > On Wednesday 10 December 2014 12:51:30 Pali Rohár wrote:
> >> On Tuesday 09 December 2014 21:07:01 Pali Rohár wrote:
> >> > Now we have autodetection code for fan multiplier and
> >> > maximal fan speed so we do not need to have those
> >> > constants for each laptop in kernel driver code.
> >> > 
> >> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> >> > ---
> >> > !!!Please do not apply this patch until all affected
> >> > machines will be tested!!!
> >> > 
> >> > I tested autodetection code only on Dell Latitude E6440
> >> > (where it worked). Other machines which needs to be
> >> > tested:
> >> > 
> >> > Dell Latitude D520
> >> > Dell Latitude E6540
> >> > Dell Precision WorkStation 490
> >> > Dell Studio
> >> > Dell XPS M140 (MXC051)
> >> > ---
> >> 
> >> Can somebody else with dell laptops test this patch series?
> > 
> > Steven Honeyman, can you test this autodetection patch on
> > your Latitude E6540?
> 
> Sure. You picked the best possible time of day to ask
> (seriously!) Just applied patches 1,2,3 and so far seems
> exactly as before so it looks OK to me.
> 

Good, thanks for testing. Now we know that my patches detects 
correct multiplier for E6440 and E6540 machines which are in dmi 
list.

> While I was spamming "sensors" I did notice this (output
> trimmed for neatness) but it is unusual my laptop fan is ever
> off so it might have always done this and I would have never
> noticed:
> Each line is about 0.5 - 1 second apart:
> 
> fan2:        3186 RPM
> fan2:        3231 RPM
> <temp is low enough, fan stops>
> fan2:        10000 RPM
> fan2:        9544 RPM
> fan2:        10000 RPM
> fan2:           0 RPM
> (stays at 0 while fan is off)
> <temp back up, fan starts>
> fan2:        3236 RPM
> fan2:        3597 RPM
> 
> Ever seen this before? I'd roll back and test again but this
> room and laptop are too warm for the fan to stop completely
> now.
> 
> 
> Thanks,
> Steven

On my E6440 I have never seen 10000 RPM.

-- 
Pali Rohár
pali.rohar@...il.com

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