linux-kernel - Re: 2.6.23-rc1 regression: hwmon/w83627ehf: wrong fan speed

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Message-ID: <20070805151737.GH6221@jupiter.solarsys.private>
Date:	Sun, 5 Aug 2007 11:17:37 -0400
From:	"Mark M. Hoffman" <mhoffman@...htlink.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
	Jean Delvare <khali@...ux-fr.org>
Subject: Re: 2.6.23-rc1 regression: hwmon/w83627ehf: wrong fan speed

Hi Stefan:

* Stefan Richter <stefanr@...6.in-berlin.de> [2007-08-05 16:51:07 +0200]:
> Mark M. Hoffman wrote:
> > It's more likely the patch before that:
> > 
> > 	hwmon/w83627ehf: Preserve speed reading when changing fan min
> 
> I reverted this patch alone and rebooted, still the same problem.
> After reboot:
>    0 RPM for case fan,
>    correct CPU fan speed, drops to 1/16 after kmsensors' first refresh
> After unloading and reloading the driver:
>    correct speed of case fan,
>    correct CPU fan speed, drops to 1/16 after kmsensors' first refresh

OK, thanks for trying that.  I'll keep looking here.

> > I'll reexamine the patch series here.  If you have time, it would help if you
> > could do a git bisect.  Use this command:
> > 
> > $ git bisect start v2.6.23-rc2 v2.6.22-rc5 drivers/hwmon/w83627ehf.c
> > 
> > Doing it this way will force you to reboot between tests; I think we would
> > need that anyway.
> 
> I'll try to reserve the time for that on some evening next week.
> Thanks,

There are a total of 9 patches between v2.6.22-rc5 and v2.6.23-rc2, so the
bisection shouldn't take long.  Also, please enable HWMON_DEBUG when you do
this, and send the resulting syslog messages.  Thanks.

Regards,

-- 
Mark M. Hoffman
mhoffman@...htlink.com

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