https://bugzilla.kernel.org/show_bug.cgi?id=55691
Summary: Laptop overheats, no fan control.
Product: ACPI
Version: 2.5
Kernel Version: 3.5.0-26-generic
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Power-Fan
AssignedTo: acpi_power-...@kernel-bugs.osdl.org
ReportedBy: naomechateies+b...@gmail.com
Regression: No
Hello,
I have a Toshiba u500 laptop and I keep having an overheat problem (cpu
temperatures frequently above 70C) - I've tried many different distros and many
different kernel versions but the problem persists: when I turn on the laptop
the fan will only come on when the CPU temperature gets very close to the
critical point (i.e., when the temperature gets past 90C), and even then it is
only active in short bursts (2 seconds, maximum).
I have also found out that suspending the laptop and turning it back on makes
the fan turn on, but I am not sure if it is actively cooling (as opposed to
being at a constant speed). I noticed that if I install one of the acpi
packages in ubuntu and run 'acpi -t' to check the temperature, the fan will
turn on for a minute or two at a speed that seems appropriate for the
temperature.
Finally, I am certain that it is not a problem with the fan or with the cooling
system, as the same laptop runs much much cooler with Windows 7.
Thank you for your attention and any help you may provide.
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