linux-kernel - Re: [PATCH] dell-smm-hwmon: Cache fan_type() calls and use fan

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Date:	Mon, 30 May 2016 17:25:26 +0100
From:	Peter Saunderson <peteasa@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Thorsten Leemhuis <fedora@...mhuis.info>,
	Jan C Peters <jcpeters89@...il.com>,
	David Santamaría Rogado <howl.nsp@...il.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Tolga Cakir <cevelnet@...il.com>, linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dell-smm-hwmon: Cache fan_type() calls and use
 fan_status() for fan detection

On 30/05/16 10:36, Pali Rohár wrote:
> Hi Peter! Thank you for information! Are you able to try to call that
> function on some old kernel (e.g. 3.12 or 3.14) to verify that it is
> caused only and only by that function?
>
I have tried to use my old 3.19.0 kernel that did not have the problem 
but now it will not boot.  The boot screen is left with

Loading Linux linux...
Loading initial ramdisk...

No logs etc.. I am guessing that some grub or ram disk change is giving 
me the problem.  I have just upgraded to Ubuntu 16.04 and do not want to 
downgrade so I am a bit stuck at the moment and doubt that I can do this 
test.

Peter.