Red Hat Bugzilla – Bug 568206
Dell Studio XPS 1640 Laptop overheats due to fan inactivity
Last modified: 2010-12-03 17:23:06 EST
Description of problem:
I have a Dell Studio XPS 1640 laptop. After about 30-45 minutes of use in Fedora 12, the laptop gets extremely hot and automatically shuts down. It appears that the fans do not turn on under Fedora, however, they work just fine under Windows 7 (what the laptop shipped with). There is nothing in /proc/acpi/fan. I tried installing lm_sensors and running pwmconfig, however, it reports 'There are no pwm-capable sensor modules installed'.
Version-Release number of selected component (if applicable):
Fedora 12 22.214.171.124-174.2.22.fc12.x86_64
How reproducible: Always
Steps to Reproduce:
1. Boot into F12 and wait for the laptop to become hot, the fans never turn on under F12.
Actual results: no fan activity
Expected results: the fan(s) to kick on and cool the laptop down.
Here are the files under /proc/acpi
While I do not have this same model laptop, I have a Dell Studio 1555, running Fedora 12 x64. I am a recent Ubuntu convert, and have really enjoyed Fedora 12. I can confirm this bug...My laptop runs for about 10-15 mins max after first boot, with the cooling fans never coming on. I installed gkrellm, and I watch my temp sensors. The laptop continues to heat and suddenly powers off. The fans never run. However, once I have to hard power on the machine..the bios recognizes the temp of the laptop and starts the cooling fans prior to boot of fedora 12. As I write this, my fans came on at boot, and have not turned off, running at super high speed..When I turned my machine back on, the Bios informed me that the machine had been cut off due to a critical thermal issue reaching 170 degrees F. When Fedora booted and gkrellm came up, the temp showed 180 degrees F. quickly cooling down due to the high speed of the cooling fan. My laptop has been on 10 mins now, and current temp is 156.2 degrees F. Can someone advise if this issue is being fixed? I never had this issue prior to running Fedora 12. Some additional information about this laptop...This laptop is dual boot Windows 7 x64, and Fedora 12. When running Windows 7 x64, the cooling fans operate normal, and the laptop never overheats, even after running all day long. When running fedora 12 x64, the laptop will overheat in less than 15 mins because the cooling fans never turn on. Here are additional laptop specs.
Intel Core 2 Duo T6600 2.20Ghz
ATI Radeon Mobile M92 (Mobile Radeon 4500 Series)
500 GB 7200 RPM Hard Drive
Intel WIFI Link 5100
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