[Bugme-new] [Bug 33742] New: Unable to raise CPU frequency of notebook after AC adapter disconnect and reconnect

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=33742

           Summary: Unable to raise CPU frequency of notebook after AC
                    adapter disconnect and reconnect
           Product: Power Management
           Version: 2.5
    Kernel Version: 2.6.39-rc4+
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
        AssignedTo: power-management_other at kernel-bugs.osdl.org
        ReportedBy: rbrito at ime.usp.br
        Regression: No


Created an attachment (id=54772)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=54772)
Brief description of the hardware that I have here.

Hi.

As per Zhang Rui's request in comment #87 of bug #11717, I am filing this bug.
Here is my original description:

> 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.

Some extra notes: I got this notebook in 2008-07, and the problems that I am
seeing date back from at least version 2.6.24, from what I can remember.

I am attaching some extra data about this notebook so that this bug report is
self contained.

If any further information is needed, please let me know.


Thanks,
Rogério Brito.

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