https://bugzilla.kernel.org/show_bug.cgi?id=11717





--- Comment #87 from Zhang Rui <[email protected]>  2011-04-20 01:58:33 ---
(In reply to comment #86)
> Hey, just a ping here would do wonders. :-)
> 
> The problem still exists with Linus' git tree. Do you want me to do another
> round of data collection?
> 
that would be great.

First, please build your kernel with CONFIG_ACPI_DEBUG set, and uncomment line
30, i.e. "/* #define DEBUG */", in drivers/acpi/ec.c,
and then run
echo core > /sys/power/pm_test
echo mem > /sys/power/state
in the new kernel, and attach the dmesg output after this test.

> Oh, just for the record, my wife has a subsequent model of this notebook (it's
> a notebook that her workplace has allowed her to use) and *that* computer
> sleeps without any problems.
> 
what's the model name of this notebook?
do they share the same BIOS image?
can you check if there is any BIOS update for your laptop?

> BTW, after further use of this notebook, I have discovered many other
> power-related quirks. For instance, if I (accidentally or not) disconnect the
> power from the mains outlet, the notebook will get stuck with both CPU cores 
> at
> the lowest frequency (in this case, 800MHz), despite me:
> 
> * changing the governor (ondemand, performance, powersave etc.---you name it,
> it won't put back the frequency to 2.0GHz);
> * putting back the power won't do and I still only get 800MHz.
> 
> A simple reboot cures this problem. The (still existent) Windows Vista install
> doesn't have this problem, for whatever reason.
> 
this sounds a real problem.
please file a new bug report for this issue only.
and attach the output of
"grep . /sys/devices/system/cpu/cpu*/cpufreq/*" both before and after
unplugging the AC adapter.

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