Bug 2074

Summary: Allowed active cooling devices missmatch ACPI 2.0b specification
Product: ACPI Reporter: Thomas Renninger (trenn)
Component: Power-FanAssignee: Len Brown (lenb)
Status: REJECTED DUPLICATE    
Severity: high CC: acpi-bugzilla
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.x, 2.4.x Subsystem:
Regression: --- Bisected commit-id:

Description Thomas Renninger 2004-02-11 04:53:51 UTC 
Distribution: SUSE
Problem Description:
ACPI 2.0b spec specifies 0-9 active cooling devices,
only 2 can be controlled via /proc/acpi/thermal_zone/*/trip_points

Steps to reproduce:
Imagine a machine with 4 active cooling devices:

	critical (S5):           102 C
	passive:                 100 C: tc1=1 tc2=2 tsp=100 devices=0xdf6cd8c0 
	active[0]:               80 C: devices=0xdf754680 
	active[1]:               65 C: devices=0xdf7545e0 
	active[2]:               55 C: devices=0xdf754560 
	active[3]:               45 C: devices=0xdf7544e0 


	echo "100:90:80:70:60" >trip_points affect following(hot,90 is ignored):

	critical (S5):           100 C
	passive:                 80 C: tc1=1 tc2=2 tsp=100 devices=0xdf6cd8c0 
	active[0]:               70 C: devices=0xdf754680 
	active[1]:               60 C: devices=0xdf7545e0 
	active[2]:               55 C: devices=0xdf754560 
	active[3]:               45 C: devices=0xdf7544e0
Comment 1 Thomas Renninger 2004-02-25 01:39:24 UTC 
The described machine is not made up from me. 
There are machines using more than two active cooling devices. 
As I cannot influence the last two, fan will always be activated at 45 degree 
Celcius. 
Question: Will this be fixed? 
If yes, about when can I anticipate with it in a kernel release? 
Thanks. 
P.S.: increased severity, to attract some attention. At least it is does not 
fit to the specification and has to be fixed sooner or later. (As sooner as 
better :) ).
Comment 2 Shaohua 2004-06-06 18:37:15 UTC 
Bug 2588 provide two seperate patches for this issue, please check it. Len, 
please mark this one as a duplicated.
Comment 3 Len Brown 2004-11-15 20:59:05 UTC 

*** This bug has been marked as a duplicate of 2588 ***