Package: hal
Version: 0.5.8.1-4
Severity: normal
On my Acer Travelmate 3002WTCi laptop, /proc/acpi/battery/BAT1/state claims
that the laptop is always drawing a voltage of 1mV:
[EMAIL PROTECTED]:/proc/acpi/battery/BAT1# cat state
present: yes
capacity state: ok
charging state: discharging
present rate: 1596 mA
remaining capacity: 2174 mAh
present voltage: 1 mV
This throws off the calculations in hald/linux/acpi.c, which divide a
(current*present voltage) by 1000 to get mWh; this loses most of the precision
in
the figure ACPI provides in mA. As a result, the GNOME battery applet
displays very round figures of how much battery time is left (3/2/1 hours,
and 100/66/33/0% remaining).
The patch below fixes the problem by assuming that all voltages <= 1mV count
as unknown and should be ignored, instead of the 0mV used for this
comparison at present. This makes the battery meter on my laptop usable
again.
=====
--- hal-0.5.8.1.orig/hald/linux/acpi.c 2006-09-20 08:23:25.000000000 +1200
+++ hal-0.5.8.1/hald/linux/acpi.c 2007-01-02 00:16:29.000000000 +1300
@@ -163,7 +163,7 @@
/* If the current voltage is unknown or greater than design,
* then use design voltage.
*/
- if (voltage <= 0 || voltage > design_voltage)
+ if (voltage <= 1 || voltage > design_voltage)
voltage = design_voltage;
normalised_current = (reporting_current * voltage) / 1000;
=====
-- System Information:
Debian Release: 4.0
APT prefers testing
APT policy: (900, 'testing'), (300, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-686
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8)
Versions of packages hal depends on:
ii adduser 3.100 Add and remove users and groups
ii dbus 1.0.2-1 simple interprocess messaging syst
ii libc6 2.3.6.ds1-8 GNU C Library: Shared libraries
ii libdbus-1-3 1.0.2-1 simple interprocess messaging syst
ii libdbus-glib-1-2 0.71-3 simple interprocess messaging syst
ii libexpat1 1.95.8-3.3 XML parsing C library - runtime li
ii libglib2.0-0 2.12.4-2 The GLib library of C routines
ii libhal-storage1 0.5.8.1-4 Hardware Abstraction Layer - share
ii libhal1 0.5.8.1-4 Hardware Abstraction Layer - share
ii libusb-0.1-4 2:0.1.12-2 userspace USB programming library
ii libvolume-id0 0.103-1 libvolume_id shared library
ii lsb-base 3.1-22 Linux Standard Base 3.1 init scrip
ii pciutils 1:2.2.4~pre4-1 Linux PCI Utilities
ii udev 0.103-1 /dev/ and hotplug management daemo
ii usbutils 0.72-7 USB console utilities
Versions of packages hal recommends:
ii eject 2.1.4-2.1 ejects CDs and operates CD-Changer
-- no debconf information
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