Bug 10934

Summary:	acpi -t showing sometimes insane values
Product:	ACPI	Reporter:	Tom Söderlund (t-om)
Component:	Power-Thermal	Assignee:	Zhang Rui (rui.zhang)
Status:	REJECTED UNREPRODUCIBLE
Severity:	normal	CC:	acpi-bugzilla
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.26-rc6-git2	Subsystem:
Regression:	---	Bisected commit-id:

Description Tom Söderlund 2008-06-18 05:37:21 UTC

Latest working kernel version: 
Earliest failing kernel version: Ubuntu's 2.6.24-19
Distribution: Ubuntu 8.04.1
Hardware Environment: Lenovo 3000 Y200 (6469-22R)
Software Environment: Gnome
Problem Description:

While investigating problem #10921, acpi -t gave a value of 144°C while running kernel versions 2.6.26-rc6-git2 and 2.6.26-rc5-git6 (both with phc patch) while the coretemp module reported normal values of around 50°C for both cores and the machine cover felt to be in normal temperature range too when touched with hand.

Additionally, acpi -t reported a value of 1°C while running Ubuntu's precompiled kernel 2.6.24-19.

Incidentally, when reporting these odd temperature values, acpi -t command did not report to my recollection any battery status information like normally.

Steps to reproduce: Investigating.. No luck yet to reproduce.

Comment 1 Len Brown 2008-06-19 22:16:55 UTC

Please reproduce the issue using an upstream kernel.org kernel.
2.6.25.y, or 2.6.26-rc at this point.

Please do not include PHC, or any out-of-tree patches.

Please include the output from dmesg -s64000
and grep . /proc/acpi/thermal_zone/*/*

If this problem was known to not exist using an earlier kernel,
it might be helpful to finding the root cause if you can identify
the latest upstream kernel that did not have this problem.

thanks,
-Len

Comment 2 Zhang Rui 2008-06-26 01:52:01 UTC

tom, any update?

Comment 3 Tom Söderlund 2008-06-26 08:10:58 UTC

It seems I can't reproduce it with current plain upstream kernels. Also the original problem seems to be unreproducible with them. So, closing.