[Pkg-acpi-devel] Bug#774423: acpi: incorrect power capacity display

[Ritesh Raj Sarraf]

Package: acpi
Version: 1.7-1
Severity: important


On newer systems, it looks like acpi's power capacity (remaining battery power) display is unreliable.
Please see a couple of invocations below. At 28%, it reports a time remaining of 00:58:58
Where as,  at 27%, it reports a time remaining of 01:04:06.


rrs at learner:~$ acpi -V
Battery 0: Discharging, 28%, 00:58:58 remaining
Battery 0: design capacity 5367 mAh, last full capacity 5367 mAh = 100%
Adapter 0: off-line
Thermal 0: ok, 38.0 degrees C
Thermal 0: trip point 0 switches to mode hot at temperature 75.0 degrees C
Thermal 1: ok, 0.0 degrees C
Thermal 1: trip point 0 switches to mode critical at temperature 127.0 degrees C
Thermal 2: ok, 46.0 degrees C
Thermal 2: trip point 0 switches to mode critical at temperature 120.0 degrees C
Thermal 2: trip point 1 switches to mode hot at temperature 99.0 degrees C
Thermal 2: trip point 2 switches to mode passive at temperature 100.0 degrees C
Thermal 2: trip point 3 switches to mode active at temperature 70.0 degrees C
Cooling 0: x86_pkg_temp no state information available
Cooling 1: intel_powerclamp no state information available
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: Processor 0 of 10
Cooling 7: Processor 0 of 10
Cooling 8: Processor 0 of 10
Cooling 9: Processor 0 of 10
Cooling 10: Fan 1 of 1
19:30 ♒♒♒   ☺    

rrs at learner:~$ acpi -V
Battery 0: Discharging, 27%, 01:04:06 remaining
Battery 0: design capacity 5367 mAh, last full capacity 5367 mAh = 100%
Adapter 0: off-line
Thermal 0: ok, 37.0 degrees C
Thermal 0: trip point 0 switches to mode hot at temperature 75.0 degrees C
Thermal 1: ok, 0.0 degrees C
Thermal 1: trip point 0 switches to mode critical at temperature 127.0 degrees C
Thermal 2: ok, 45.0 degrees C
Thermal 2: trip point 0 switches to mode critical at temperature 120.0 degrees C
Thermal 2: trip point 1 switches to mode hot at temperature 99.0 degrees C
Thermal 2: trip point 2 switches to mode passive at temperature 100.0 degrees C
Thermal 2: trip point 3 switches to mode active at temperature 70.0 degrees C
Cooling 0: x86_pkg_temp no state information available
Cooling 1: intel_powerclamp no state information available
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: Processor 0 of 10
Cooling 7: Processor 0 of 10
Cooling 8: Processor 0 of 10
Cooling 9: Processor 0 of 10
Cooling 10: Fan 1 of 1
19:31 ♒♒♒   ☺    

rrs at learner:~$ acpi -V
Battery 0: Discharging, 27%, 01:04:06 remaining
Battery 0: design capacity 5367 mAh, last full capacity 5367 mAh = 100%
Adapter 0: off-line
Thermal 0: ok, 38.0 degrees C
Thermal 0: trip point 0 switches to mode hot at temperature 75.0 degrees C
Thermal 1: ok, 0.0 degrees C
Thermal 1: trip point 0 switches to mode critical at temperature 127.0 degrees C
Thermal 2: ok, 45.0 degrees C
Thermal 2: trip point 0 switches to mode critical at temperature 120.0 degrees C
Thermal 2: trip point 1 switches to mode hot at temperature 99.0 degrees C
Thermal 2: trip point 2 switches to mode passive at temperature 100.0 degrees C
Thermal 2: trip point 3 switches to mode active at temperature 70.0 degrees C
Cooling 0: x86_pkg_temp no state information available
Cooling 1: intel_powerclamp no state information available
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: Processor 0 of 10
Cooling 7: Processor 0 of 10
Cooling 8: Processor 0 of 10
Cooling 9: Processor 0 of 10
Cooling 10: Fan 1 of 1
19:31 ♒♒♒   ☺    


-- System Information:
Debian Release: 8.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages acpi depends on:
ii  libc6  2.19-13

acpi recommends no packages.

acpi suggests no packages.

-- no debconf information