I have a Compaq R3000Z laptop that I recently upgraded from FC3 to FC4.
With FC3 the battery meter always works well. It showed when the laptop was on AC or battery and gave me a percentage of battery available.
However upon upgrading to FC4 I find it doesn't work. The first problem is when I add the Battery Monitor to the panel I get the following error:
"Can't access ACPI events in /var/run/acpid.socket! Make sure the ACPI subsystem is working and the acpid daemon is running."
I'm pretty sure ACPI is working properly because /proc/acpi/battery/BAT1/info contains the following info:
design capacity: 6000 mAh
last full capacity: 5218 mAh
battery technology: rechargeable
design voltage: 14800 mV
design capacity warning: 300 mAh
design capacity low: 180 mAh
capacity granularity 1: 264 mAh
capacity granularity 2: 3780 mAh
model number: Primary
battery type: Lion
OEM info: Hewlett-Packard
The /var/run/acpid.socket does NOT exist. When I restart the acpid daemon I get the following error:
Stopping acpi daemon: [FAILED]
Starting acpi daemon: acpid: can't open /proc/acpi/event: Device or resource busy
That file does exist but lsof shows that the following process has it open:
hald-addo 2128 root 4r REG 0,3 0 4026532097 /proc/acpi/event
That seems to be the "hald-addon-acpi" process.
Any ideas what's going on here?