http://bugzilla.kernel.org/show_bug.cgi?id=13967





--- Comment #14 from Michael Tokarev <m...@tls.msk.ru>  2009-09-09 10:40:15 ---
M3A78-EM mobo here too.  Was rock solid for 1.5years of heavily use already.  I
had a script that monitors system themeratures and fans and adjusts everything
(like fancontrol).  The fan starts at very low speed in bios, and at higher
load linux speeds it up.  But today I faced a few reboots in a row and overall
system instability.  After trying to understand what's goin on I discovered
that sensors does not work anymore and my script fails to speed fans and hence
the system overheats.  Sure it's a bug in my script -- I added some checks and
explicit shutdown into it.  But hey, it's unwise to fry someone's computers
this way!.. (so far thermal protection worked so nothing broke, I just lost a
few KBs of unsaved data)

Note that neither asus_atk0110 driver nor the mentioned kernel command line
works.  asus_atk0110 loads but does nothing and does not find any sensors, and
it87 does not load due to that ACPI resource conflict.

Tried the latest bios from Asus (1902), but it only adds new CPU support, and
the problem stays the same.  Also observed the same issue on M3A-H/HDMI
motherboard, but there I didn't try boot option yet (asus_atk0110 does not work
there either).

For the original reason of conflict - I *guess* that it's the way how Asus
implements its Q-Fan (and Q-Fan2 on more expensive boards) feature, like poking
at it87 registers to change fan speeds and read themps when enabled.  Here it's
disabled (because the feature does not work the way I want it to work).  More,
any write to it87 pwm registers immediately disables q-fan, so it stops
changing fan speed automatically.

-- 
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with 
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
acpi-bugzilla mailing list
acpi-bugzilla@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla

Reply via email to