Bug 15785 - buggy _PPC return value when laptop boots without battery -- Thinkpad T61
Summary: buggy _PPC return value when laptop boots without battery -- Thinkpad T61
Status: CLOSED DOCUMENTED
Alias: None
Product: ACPI
Classification: Unclassified
Component: Power-Processor (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Zhang Rui
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-04-15 01:47 UTC by Zhang Rui
Modified: 2010-04-15 02:15 UTC (History)
1 user (show)

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Regression: No
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Description Zhang Rui 2010-04-15 01:47:19 UTC 
The _PPC method on T61 returns 2 when the laptop boots without battery.
This is meaningless because it disables the processor P0 and P1 state in AC mode.
Comment 1 Zhang Rui 2010-04-15 02:15:16 UTC 
Len, " This is a T61 specific bug, and I don't want to mess up the general code path to address a BIOS bug on a single machine.. Another way is to boot the machine with a battery in it, like everybody else does. If you need the battery out of the machine for measurements, take it out after boot."
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