https://bugzilla.kernel.org/show_bug.cgi?id=203829
Bug ID: 203829
Summary: Battery status no longer properly working on Lenovo
Ideapad 100S
Product: ACPI
Version: 2.5
Kernel Version: 4.19.22
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Battery
Assignee: acpi_power-batt...@kernel-bugs.osdl.org
Reporter: klappn...@web.de
Regression: Yes
Created attachment 283123
--> https://bugzilla.kernel.org/attachment.cgi?id=283123&action=edit
dmidecode info
With the Lenovo Ideapd 100S beginning with Kernel 4.19.22 the battery status no
longer works properly. The bug still persists with 5.2-rc3.
Unfortunately I have not been able to find useful messages in the syslog or
dmesg output; I will try to describe the symptoms the best I can.
When booting the system without the charger, during the boot process for some
reason the laptop's battery light starts blinking white. Apart from this the
battery status seems to be reported correctly. When the charger is plugged in,
the battery light still blinks instead of glowing steadily. The battery appears
to be charged, however the status (resp. the percentage) reported by upower
never changes. When the charger is disconnected again, the reported percentage
remains at the incorrect "before charging" value until the battery is
discharged to a lower value. When the laptop is shut down, the battery light
keeps blinking, however its color changes to red. When the laptop is being
rebooted after charging, the incorrect percentage value wil still be reported,
regardless of which kernel is used for the reboot.
None of the above symptoms occurs with 4.19.21, both the battery light and the
reported battery status work as expected.
I attached dmidecode info of the Ideapad. Please let me know, if you need more
information.
Best regards
Michael
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