Bug 139878 - system hard locks when lm_sensors is started
Summary: system hard locks when lm_sensors is started
Alias: None
Product: Fedora
Classification: Fedora
Component: lm_sensors
Version: 3
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Phil Knirsch
QA Contact: David Lawrence
Depends On:
TreeView+ depends on / blocked
Reported: 2004-11-18 16:48 UTC by John H. Hammond
Modified: 2015-03-05 01:14 UTC (History)
1 user (show)

Clone Of:
Last Closed: 2005-05-23 15:50:10 UTC

Attachments (Terms of Use)

Description John H. Hammond 2004-11-18 16:48:06 UTC
Description of problem:
When 'sensors -s' is run, system hard locks (i.e. requires power
cycling to reset) IF lm85 is present AND cpu core temperature is >50C.
 This can be avoided if the lm85 section in sensors.conf has the:
set temp1_max
set temp2_max
parameters set to something above the current CPU temp (in my case, I
changed them both to 70C).

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. install FC3 on a machine with an lm85 sensor chip
2. run sensors-detect
3. wait until CPU core temperature is above 50C
4. start lm_sensors

Additional info:

This bug was noticed on a Dell Pentium 4 (with typically terrible OEM
cooling) where the CPU temperature routinely hits 68C with 100% CPU
usage.  With all the hot running Prescott cored CPUs in wide use
today, perhaps changing the default value of temp1_max and temp2_max
(at least for sensor chips commonly used on P4s) to something higher
might be in order?

Comment 1 Phil Knirsch 2005-05-23 15:50:10 UTC
The current lm_sensors-2.9.1 which is in devel has 65C resp. 70C for temp1_max
resp. temp2_max for that chipset and i'd rather not deviate from these obviously
recommended values.

Read ya, Phil

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