[Bug 392812] Re: Dell Studio 1555: cannot change display brightness after a while, other hotkeys and ACPI stuff begin to fail

[Pablo Olmos de Aguilera Corradini]

I continued to use the laptop (after resume and telling me those weird
0°C) and suddenly (after some bug with an app - I think unrelated) it
shut down. No warn message or anything, looking in the kern.log I got
this before the shutdown:

Jan 25 16:59:32 studio kernel: [18440.303726] CPU1: Temperature above threshold, cpu clock throttled (total events = 1)
Jan 25 16:59:32 studio kernel: [18440.303731] Disabling lock debugging due to kernel taint
Jan 25 16:59:32 studio kernel: [18440.304215] CPU1: Temperature/speed normal
Jan 25 16:59:34 studio kernel: [18442.012510] Machine check events logged

After that appears the bug of the subtitle editor and then the next
kernel start (I included the kern.log of that moment). The last entry
from kern.log is at [18446.595247].

I ran the acpi -t and sensors as soon as I turned on the laptop and got
the following:

~$ acpi -t
Thermal 0: ok, 0.0 degrees C
Thermal 1: ok, 65.0 degrees C
Thermal 2: ok, 57.0 degrees C

~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +44.0°C  (crit = +100.0°C)                  
temp2:       +51.0°C  (crit = +100.0°C)                  
temp3:        +0.0°C  (crit = +100.0°C)                  

coretemp-isa-0000
Adapter: ISA adapter
Core 0:      +43.0°C  (high = +105.0°C, crit = +105.0°C)  

coretemp-isa-0001
Adapter: ISA adapter
Core 1:      +44.0°C  (high = +105.0°C, crit = +105.0°C)

That value drew my attention: Thermal 1: ok, 65.0 degrees C ; but I
don't know if has something to do.

** Attachment added: "kern.log"
   http://launchpadlibrarian.net/38374861/kern.log

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Dell Studio 1555: cannot change display brightness after a while, other hotkeys and ACPI stuff begin to fail
https://bugs.launchpad.net/bugs/392812
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