Bug 56281

Summary: overheating issues on Thinkpad X24
Product: Drivers Reporter: Rolf Leggewie (bugzilla.kernel.org)
Component: Platform_x86Assignee: drivers_platform_x86 (drivers_platform_x86)
Status: NEEDINFO ---    
Severity: normal CC: tianyu.lan
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 3.9.0 Subsystem:
Regression: No Bisected commit-id:
Attachments: acpidump and dmesg from X24 (Ubuntu 3.2.0-39 kernel)
acpidump and dmesg from X24 - running mainline kernel

Description Rolf Leggewie 2013-04-05 18:09:38 UTC 
I have overheating issues on my Thinkpad X24.  I haven't used it for a while so I can't say when things stopped working.  I verified the problem with a 3.9.0 mainline kernel from around March 12.  The OS is Ubuntu precise.

It appears that the problem is improper support for the fan which runs at the same speed irrespective of temperature.  Here is the output of sensors.

$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +75.0°C  (crit = +95.0°C)

thinkpad-isa-0000
Adapter: ISA adapter
fan1:           0 RPM
temp1:        +75.0°C  
temp2:        +63.0°C  
temp3:        +50.0°C  
temp4:         +0.0°C  
temp5:         +0.0°C  
temp6:         +0.0°C  
temp7:         +0.0°C  
temp8:         +0.0°C  

If ambient temperatures are above 30 degrees and the computer is slightly used the critical shutdown temperature of 95° for temp1 is frequently reached. This results in an immediate shutdown of the system.

As you can see the fan is reported at 0 rpm even though it simply runs at a steady pace and is never sped up or slowed down no matter the temperature.

Let me know what other information I can provide.
Comment 1 Lan Tianyu 2013-04-06 03:39:50 UTC 
Please attach the output of acpidump and dmesg, Thanks.
Comment 2 Rolf Leggewie 2013-04-06 08:51:48 UTC 
Created attachment 97541 [details]
acpidump and dmesg from X24 (Ubuntu 3.2.0-39 kernel)

Tianyu Lan, thank you for your comment.  Here is the information you requested.
Comment 3 Rolf Leggewie 2013-04-07 04:24:41 UTC 
Created attachment 97621 [details]
acpidump and dmesg from X24 - running mainline kernel

I guess you want that information when I'm running the mainline kernel
Comment 4 Zhang Rui 2013-06-24 02:51:50 UTC 
no ACPI Fan control in this laptop.
Reassigned.
Comment 5 Rolf Leggewie 2013-09-04 14:42:56 UTC 
This ticket is still marked as NEEDINFO.  Any other information I can provide?

FWIW, I have now found a way to trigger the temperature shutdown even in cold climate.  When running ondemand governor and starting jockey-gtk it takes about 60 second for the computer to overheat and shutdown.