Arch Linux

dawei

Member

From: China

Registered: 2007-05-02

Posts: 29

acpitool problem with kernel 2.6.21

After upgrading from kernel 2.6.20 to 2.6.21, acpitool package doesnt work on my laptop(hp compaq nx/nc6120) any more.
Below is the output of the acpitool command:

[root@sun-laptop ~]# acpitool
 AcpiTool v0.4.7, released 06-Feb-2007
Seems like this system lacks ACPI support or else /proc/acpi is not the place to look for ?

/proc/acpi directory is there:

[root@sun-laptop ~]# ls /proc/acpi
ac_adapter  alarm  battery  button  dsdt  embedded_controller  event  fadt  fan  power_resource  processor  thermal_zone  wakeup

All of the acpi modules seem loaded correctly:

<other modules>
thermal                11656  0
processor              24788  1 thermal
fan                     3972  0
button                  6288  0
battery                 8580  0
ac                      4100  0
<other modules>

I have downgraded the kernel to 2.6.20, and acpitool -e displays all the acpi info correctly.
Is this a kernel bug or incompatible between acpitool and kernel 2.6.21?

Last edited by dawei (2007-05-07 10:15:32)

billy

Member

From: Slovenia

Registered: 2006-09-13

Posts: 164

Re: acpitool problem with kernel 2.6.21

same problem here (dell inspiron 6400)

Last edited by billy (2007-05-07 10:02:10)

rico1986

Member

From: Slovenia

Registered: 2007-05-13

Posts: 34

Website

Re: acpitool problem with kernel 2.6.21

it is lacking acpi support under kernel 2.6.21
there must be some patch around .. not found it yet. i'll let you know if i found it.

Last edited by rico1986 (2007-05-14 08:48:14)

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regards, Tim

patroclo7

Member

From: Bassano del Grappa, ITALY

Registered: 2006-01-11

Posts: 915

Re: acpitool problem with kernel 2.6.21

The fact is that in 2.6.21 the use of the /proc  filesystem by acpi has been deprecated, while many apps - including acpitool still rely on it. This does not mean that acpi does not work.

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