Re: gkrellm: Floating point exception during startup

On Tue, 24 Feb 2009 12:36:31 +0100
"Malte J. Wetz" <[email protected]> wrote:

> Bill Wilson <[email protected]> wrote:
> > and then if gkrellm will run, we can get a better idea of what's going
> > wrong if you get battery debug data by running:
> >     $ gkrellm -d 0x8000
> 
> Thanks for your help so far.
> 
> Here's the output from gkrellm (which starts fine with the patch):
> 
> <------------- snip --------------->
> mjw@aegir:~/downloads/gkrellm-2.3.2/src$ ./gkrellm -d 0x8000
> --- GKrellM 2.3.2 ---
> sysfs_power_setup() entry
> setup_sysfs_power_entry: checking /sys/class/power_supply/ACAD/type
> read_sysfs_entry: /sys/class/power_supply/ACAD/type = Mains
> setup_sysfs_ac_power: /sys/class/power_supply/ACAD
> setup_sysfs_power_entry: checking /sys/class/power_supply/BAT0/type
> read_sysfs_entry: /sys/class/power_supply/BAT0/type = Battery
> setup_sysfs_battery: /sys/class/power_supply/BAT0
> setup_sysfs_battery: /sys/class/power_supply/BAT0/charge_full, /sys/class/power_supply/BAT0/charge_now
> read_sysfs_entry: /sys/class/power_supply/ACAD/online = 1
> read_sysfs_entry: /sys/class/power_supply/BAT0/present = 1
> read_sysfs_entry: /sys/class/power_supply/BAT0/charge_full = 0
> read_sysfs_entry: /sys/class/power_supply/BAT0/charge_now = 4420000
> read_sysfs_entry: /sys/class/power_supply/BAT0/status = Full
> <------------- snap --------------->
> 
> I notice the "charge_full = 0" line which appears strange to me.
> Perhaps this netbook does not support that feature?

That's the problem and either the netbook or the kernel is not supporting it.

> The only useful information can be obtained via ACPI:
> 
> ,----
> | mjw@aegir:~$ cat /proc/acpi/battery/BAT0/state 
> | present:                 yes
> | capacity state:          ok
> | charging state:          charged
> | present rate:            0 mA
> | remaining capacity:      4378 mAh
> | present voltage:         12473 mV
> `----

Getting battery data from sysfs has become the preferred way, but you can still get
gkrellm to use ACPI battery data.  Just run:

$  gkrellm -use-acpi-battery

Then perhaps each time you do a kernel upgrade you can check to see
if your sysfs battery data becomes fully supported.  And along the way,
to be sure what gkrellm is doing, just add the -d 0x8000 battery debug flag.

Anyway, eliminating that divide by zero problem is important so thanks for
your help in tracking it down.

Bill

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