[Bug 810219] New: T400 becomes too hot and shuts down
https://bugzilla.novell.com/show_bug.cgi?id=810219 https://bugzilla.novell.com/show_bug.cgi?id=810219#c0 Summary: T400 becomes too hot and shuts down Classification: openSUSE Product: openSUSE 12.3 Version: Final Platform: Other OS/Version: Other Status: NEW Severity: Critical Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: psankar@novell.com QAContact: qa-bugs@suse.de Found By: --- Blocker: --- After upgrading to 12.3, my thinkpad t400 becomes hot and shuts down too often. There is no problem with the hardware as the windows booting works fine for hours. I used to increase fan speed by the steps mentioned in http://www.thinkwiki.org/wiki/How_to_control_fan_speed in the earlier versions of openSUSE. But I no longer get a /proc/acpi/ibm/fan or thinkpad_acpi.conf with 12.3 This makes my machine shutdown multiple times everyday. Please suggest a workaround or fix. I will be happy to provide any information you want. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jeff Mahoney
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Joey Lee
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--- Comment #2 from Sankar P
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--- Comment #3 from Sankar P
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Sankar P
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--- Comment #5 from Sankar P
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Joey Lee
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--- Comment #7 from Michael Chang
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--- Comment #8 from Sankar P
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--- Comment #9 from Michael Chang
Even in disengaged mode, I do not get the fan to spin at 7000. The maximum I have seen is around 5000. However, with auto, it usually is around 3.5k only and does not go further than that.
I think revolution speed varies from model to model and the speed I mentioned is just to demonstrate the problem, the whole point is that auto mode couldn't reach full speed as in the disengaged mode. Look at the bug report and you're looking forward to a workaround fix, what about trying the thinkfan utility to regulate the fan speed in userspace than counting on the firmware (ec) ? It should save you from draining battery power. However it seems that thinkfan is not officially part of openSUSE release. It's available to openSUSE in someone's home project. [1] [1] http://software.opensuse.org/package/thinkfan -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #10 from Sankar P
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--- Comment #11 from Michael Chang
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--- Comment #12 from Jean Delvare
Can we get the bug not fixed to work correctly in the auto mode ? (I am not complaining but just trying to find out if it is really unsolveable. The machine cools correctly in windows and Thinkpad being developers' laptop etc. should let linux run good)
Have you compared power consumption between Linux and Windows? How fast does the fan spin under Windows? Michael seems to assume that the problem is that the fan doesn't spin fast enough under Linux. I think the problem is that the machine generates too much heat under Linux. 5000 RPM is really fast for a computer fan, and even more so for a laptop fan. I never had a fan spinning that fast in any laptop of mine. I did not have a fan spinning that fast in any of my desktop computers since 1998 or so. Only servers and powerful workstation still sometimes have fans which are that fast. The fact that disengaged mode drives the Thinkpad fans above the maximum speed they can reach in controlled mode is nothing new, it has always been the case. AFAIK the speed difference is only a guarantee that the fan will not wear out too fast and that cooling will still be efficient when the fan ages and/or dust accumulates over time. You are not supposed to use full speed mode AFAIK. Also note that, according to Sankar, this is a regression, previous versions of openSUSE (or SLED?) did not have the problem. So I don't think you can just blame the firmware. Maybe a kernel bisection would help, but it takes time. I'd do if if I had a T400 at hand, but I don't. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #13 from Michael Chang
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--- Comment #14 from Michael Chang
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Jeffrey Cheung
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