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Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery

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On Sun, Sep 07, 2025 at 08:08:02PM +0100, James Addison wrote:
> Package: src:linux
> Version: 6.16.3-1
> Severity: normal
> 
> Dear Maintainer,
> 
> There is a possibility that my laptop's battery is in a degrated state of
> health; if this issue is determined to be a hardware problem, then my apologies
> in advance for time spent debugging.
> 
> Recently I have noticed that the battery power indicator in my GNOME desktop
> environment frequently indicates a 0% charge level, despite the fact that the
> laptop can continue without AC power for some time.
> 
> I've been using the upower utility (from the binary package of the same name)
> to report in-use battery statistics, and receive inconsistent results.
> 
> The most recent results, as I write this, are shown below:
> 
>   $ sudo upower -i /org/freedesktop/UPower/devices/battery_BAT0
>     native-path:          BAT0
>     vendor:               LGC
>     model:                00HW028
>     serial:               65535
>     power supply:         yes
>     updated:              Sun Sep  7 20:01:12 2025 (7 seconds ago)
>     has history:          yes
>     has statistics:       yes
>     battery
>       present:             yes
>       rechargeable:        yes
>       state:               pending-charge
>       warning-level:       none
>       energy:              0 Wh
>       energy-empty:        0 Wh
>       energy-full:         43.41 Wh
>       energy-full-design:  50.54 Wh
>       voltage-min-design:  15.2 V
>       capacity-level:      Critical
>       energy-rate:         0 W
>       charge-cycles:       N/A
>       percentage:          0%
>       capacity:            85.8924%
>       technology:          lithium-polymer
>       charge-start-threshold:        75%
>       charge-end-threshold:          80%
>       charge-threshold-enabled:      yes
>       charge-threshold-supported:    yes
>       icon-name:          'battery-caution-charging-symbolic'
>     History (charge):
>       1757271651	0.000	unknown
>     History (rate):
>       1757271651	0.000	unknown
> 
> 
> In previous boots of the system earlier today, I have encountered 0 Wh values
> simultaneously for both the energy-full and energy-full design fields.
> 
> I do not recall encountering the 0% battery status indicator before upgrading
> to Debian trixie -- however, it is also possible that the physical state of the
> battery has degraded within that same time window.

Can you please retest with the bookworm kernel? If there the problem
doesn't occur it's most likely a regression, if not, it's probably your
hardware that has a problem.

To do that just temporarily readd the bookworm URLs back to apt if
necessary (something like:

	$ cat /etc/apt/sources.list.d/deb12-bookworm.sources
	Types: deb deb-src
	URIs: http://deb.debian.org/debian/
	Suites: bookworm
	Components: main contrib non-free non-free-firmware
	Signed-By: /usr/share/keyrings/debian-archive-bookworm-stable.gpg

	Types: deb
	URIs: http://deb.debian.org/debian/
	Suites: bookworm-updates
	Components: main contrib non-free non-free-firmware
	Signed-By: /usr/share/keyrings/debian-archive-bookworm-automatic.gpg

	Types: deb
	URIs: http://debug.mirrors.debian.org/debian-debug/
	Suites: bookworm-debug
	Components: main contrib non-free non-free-firmware
	Signed-By: /usr/share/keyrings/debian-archive-bookworm-stable.gpg

	Types: deb
	URIs: https://security.debian.org/debian-security
	Suites: bookworm-security
	Components: main contrib non-free non-free-firmware
	Signed-by: /usr/share/keyrings/debian-archive-bookworm-security-automatic.gpg

), install linux-image-6.1.0-39-amd64 and boot into that kernel.

Best regards
Uwe

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Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery James Addison <jay@jp-hosting.net> - 2025-09-07 21:20 +0200
  Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery James Addison <jay@jp-hosting.net> - 2025-09-08 22:50 +0200
  Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-15 09:40 +0200
  Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery James Addison <jay@jp-hosting.net> - 2025-09-18 16:00 +0200
  Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery James Addison <jay@jp-hosting.net> - 2025-10-04 12:50 +0200
  Bug#1114642: marked as done (acpi: ThinkPad X1 Yoga:  inconsistent/zero energy-full-design values for internal battery) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-13 08:50 +0200
  Bug#1114642: acpi: ThinkPad X1 Yoga: inconsistent/zero energy-full-design values for internal battery James Addison <jay@jp-hosting.net> - 2025-10-13 10:40 +0200

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