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IDProjectCategoryView StatusDate SubmittedLast Update
0001400SpeedFanFan controlpublic2009-05-08 18:312019-04-07 17:25
ReporterTak 
Assigned Toalfredo 
PrioritynormalSeveritymajorReproducibilityalways
StatusacknowledgedResolutionopen 
PlatformLatitude C610OSXPOS VersionSP3
Product Version4.38 
Target VersionFixed in Version 
Summary0001400: Fan speeds reset to about 50% every few seconds after speed fan starts
DescriptionAll fan speeds reset to about 50% every few seconds after speed fan starts. Changing the speeds with speed fan only lasts a few seconds. This is different than the system's natural fan speeds. This persists after speed fan exits. The issue also remains after a system standby.

If the system is hibernated speedfan works as expected until the next time speed fan is re-opened.
Steps To Reproduce(seems specific to this hardware)

1. open speedfan
Additional InformationDell Latitude C610
Phoenix ROM BIOS PLUS Version 1.10 A05


Win9x:NO 64Bit:NO GiveIO:YES SpeedFan:YES
I/O properly initialized
Linked ISA BUS at $0290
SMBus successfully enabled
Linked Intel 82801CAM ICH3 SMBUS at $08C0
Scanning ISA BUS at $0290...
SuperIO Chip=LPC47n252
none at $3E8 msg : DELL Sensor constructor starting...
none at $3E8 msg : DFC : c=0000 d=0100 s1=0000 s2=0000
none at $3E8 msg : Fan 0 properly set through SMBIOS
none at $3E8 msg : DFC : c=0000 d=0101 s1=0000 s2=0000
none at $3E8 msg : Fan 1 properly set through SMBIOS
none at $3E8 msg : info1 : CMD=$0023 DATA=$4680 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0001 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0002 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0003 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0004 S1=$0000 S2=$0000
none at $3E8 msg : info fan0 : CMD=$00C6 DATA=$0000 S1=$0000 S2=$0000
none at $3E8 msg : info fan1 : CMD=$00EA DATA=$0001 S1=$0000 S2=$0000
none at $3E8 msg : info fan2 : CMD=$001E DATA=$0002 S1=$0000 S2=$0000
Scanning Intel SMBus at $08C0...
SMBus msg : 11:49:43.645 Unsuccessful WRITEQUICK $00 to $44
SMBus msg : 11:49:43.645 Unsuccessful WRITEQUICK $00 to $44
Found FUJITSU MHT2040AT (40.0GB)
Found ACPI temperature (39.5C)
End of detection
TagsNo tags attached.
Motherboard ModelDell Latitude C610
Video Card Model
Attached Files

- Relationships

-  Notes
(0004766)
Tak (reporter)
2009-05-08 18:36

For some reason the bug tracking software has changed "~ 50%" (approximately 50%) to some sort of note/hyperlink to a really old, unrelated, bug report. Please correct.
(0004776)
alfredo (manager)
2009-05-12 09:57

Correct me if I'm wrong. If you let SpeedFan change fan speeds, SpeedFan's selection is soon overriden and fan speeds revert to about 50%.
I have troubles understanding what "This persists after speed fan exits" actually means. If you exit SpeedFan, SpeedFan will no longer be able to change fan speeds. How can you then observe the same behaviour?
(0004781)
Tak (reporter)
2009-05-12 15:45

It is overridden in moments, it may say speed: 100%, and then I hear the (audible) speed drop to about 50%, the CPU is cool so the speed setting drops to 90% and the (audible) speed goes UP (from 50% to 90%), moments later its still showing 90% but the effective speed (both fans) goes back to about 50%.

Normally (on most systems, and this system if I hibernate and resume the system after opening speedfan), the fan speeds remain at whatever speedfan last set them to, but on this system (opening speedfan without hibernating), the speeds go back to 50% (both fans). So if I turn both fans off (or to 100%), and quickly exit they got back to about 50% after speed fan exits.

It almost seems like speed fan is messing something up (in memory) with the system that powering off (with hibernate) clears.

If there was a debug version that added delays between the lines in the initialization I could tell you which line starts the abnormal behavior.
(0004832)
Tak (reporter)
2009-05-30 23:35

Also there is one bit of info I forgot to mention (not really a bug):
If I set the fan speed to full and exit speedfan and reboot, the fans remain at full speed even after the reboot.

Is there anything I can do at this point to help resolve this issue?
(0004890)
Tak (reporter)
2009-06-28 01:44

Using 4.39 beta 7, symptoms are identical, no changes.
(0005317)
Tak (reporter)
2010-07-07 05:45

4.41 beta 15, no real changes in regards to this bug.

Any chance you can add an option for debug delay between the stages of initialization? maybe more debug lines too?

Guessing at random, maybe these lines are important:
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0001 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0002 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0003 S1=$0000 S2=$0000
none at $3E8 msg : ERROR info1 : CMD=$FFFF DATA=$0004 S1=$0000 S2=$0000

SMBus msg : 11:49:43.645 Unsuccessful WRITEQUICK $00 to $44
SMBus msg : 11:49:43.645 Unsuccessful WRITEQUICK $00 to $44

- Issue History
Date Modified Username Field Change
2009-05-08 18:31 Tak New Issue
2009-05-08 18:31 Tak Status new => assigned
2009-05-08 18:31 Tak Assigned To => alfredo
2009-05-08 18:31 Tak Motherboard Model => Dell Latitude C610
2009-05-08 18:36 Tak Note Added: 0004766
2009-05-12 09:54 alfredo Summary Fan speeds reset to 0000004:0000050% every few seconds after speed fan starts => Fan speeds reset to about 50% every few seconds after speed fan starts
2009-05-12 09:57 alfredo Note Added: 0004776
2009-05-12 09:57 alfredo Status assigned => acknowledged
2009-05-12 09:57 alfredo Description Updated
2009-05-12 15:45 Tak Note Added: 0004781
2009-05-30 23:35 Tak Note Added: 0004832
2009-06-28 01:44 Tak Note Added: 0004890
2010-07-07 05:45 Tak Note Added: 0005317
2019-02-07 06:44 user5582 Note Added: 0008863
2019-02-09 19:57 user5627 Note Added: 0008873
2019-04-01 12:38 almico Note Deleted: 0008863
2019-04-01 12:38 almico Note Deleted: 0008873
2019-04-02 12:25 user5851 Note Added: 0009167
2019-04-07 17:25 user5878 Note Added: 0009188
2019-04-09 15:47 almico Note Deleted: 0009167
2019-04-09 15:47 almico Note Deleted: 0009188


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