Arch Linux

Description:

Since 4.0.3 kernel version, various problems occured.
My power management shows no battery present. When i type "acpi" to the terminal, the process freezes (though i can kill it).
If i want to install another kernel and generate initial ramdisk (automatic with pacman) this process freezes too, when it reach the "autodetect" hook.
When i try to shut the laptop down it says:
"A stop job is running for Daemon for power management ( Xmin Ys / Zmin Ws)"
and it wait for a very long time, maybe forever. (I never waited more than a few minutes)
It is a very old laptop and everything worked fairly well till 4.0.2.

Additional info:
package versions:
all wrong from 4.0.3-1 to 4.0.7-2
the last good was 4.0.2-1

(Through my "debugging" process I've tried the lts kernel which was wrong too.)

Sorry for my poor English.