Bug#1109344: /boot/vmlinuz-6.12.35+deb13-amd64: uevent field power_supply/BAT1/uevent:POWER_SUPPLY_CURRENT_NOW now -ve
Control: tags -1 wontfix
Control: close -1
On Tue, Jul 15, 2025 at 02:36:57PM +0100, Ian Jackson wrote:
> Note that the previous value was positive, and the new value is
> negative. In both cases the laptop was not charging.
> The negative value makes semantic sense, but I wonder if this change
> was deliberate. It seems like precisely the kind of bug-for-bug
> compatibility thing that Linux normally tries to retain.
The documentation of Linux specifies the allowed values as:
| Valid values: Represented in microamps. Negative values are used for
| discharging batteries, positive values for charging batteries and for
| USB IBUS current.
Implementations for other power supplies, current macs for example,
implement this correctly with negative values for discharging. So the
kernel already returns positive or negative numbers depending on the
exact hardware used.
After careful consideration, I'm closing this as not a bug.
Regards,
Bastian
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