Good day everyone,
Since linux 5.8 I'm experiencing a problem related to power source
detection on my laptop. My machine is equipped with 2 typec ports, one
of them has power delivery and is used for charging, another one has
only data transfer capability. The issue is, when I unplug the power
cable, the OS is reporting something like "Battery at 100%, plugged in
but still discharging" (KDE Plasma notification) - whether another
port is used or not. I checked with upower, you can see the output for
kernel 5.4 and 5.10 attached. In brief, on 5.8 onwards I have some
"line_power_ucsi_source_psy_USBC000o001" device which is considered a
power supply and that prevents OS to switch to "battery mode" when
unplugging the cable, instead it thinks there's a power source but not
powerful enough to charge the battery, upower says this: "on-battery:
no", but actually no ac power source is connected.
I did some research with git bisect up to the merge commit
`e611c0fe318c6d6827ee2bba660fbc23cf73f7dc` ("Merge tag 'usb-5.8-rc1'
of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb"), and
looked through its content. My wild guess based on upower output is
that a new driver introduced there, /drivers/usb/typec/ucsi/psy.c, is
responsible for this wrong behavior.
Could you please look into that based on info I'm providing?
Thank you!
--
----
Best regards,
Vladimir Yerilov
Device: /org/freedesktop/UPower/devices/line_power_ADP0
native-path: ADP0
power supply: yes
updated: Sun 08 Nov 2020 15:27:39 +10 (97 seconds ago)
has history: no
has statistics: no
line-power
warning-level: none
online: yes
icon-name: 'ac-adapter-symbolic'
Device: /org/freedesktop/UPower/devices/battery_BAT0
native-path: BAT0
vendor: SUNWODA
model: R15B01W
serial: ACFA
power supply: yes
updated: Sun 08 Nov 2020 15:27:39 +10 (97 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: charging
warning-level: none
energy: 46.198 Wh
energy-empty: 0 Wh
energy-full: 46.664 Wh
energy-full-design: 60.04 Wh
energy-rate: 2.059 W
voltage: 8.672 V
time to full: 13.6 minutes
percentage: 99%
capacity: 77.7215%
technology: lithium-ion
icon-name: 'battery-full-charging-symbolic'
History (charge):
1604813259 0.000 unknown
History (rate):
1604813259 0.000 unknown
Device: /org/freedesktop/UPower/devices/line_power_ucsi_source_psy_USBC000o001
native-path: ucsi-source-psy-USBC000:001
power supply: yes
updated: Sun 08 Nov 2020 15:27:39 +10 (97 seconds ago)
has history: no
has statistics: no
line-power
warning-level: none
online: yes
icon-name: 'ac-adapter-symbolic'
Device: /org/freedesktop/UPower/devices/DisplayDevice
power supply: yes
updated: Sun 08 Nov 2020 15:27:39 +10 (97 seconds ago)
has history: no
has statistics: no
battery
present: yes
state: charging
warning-level: none
energy: 46.198 Wh
energy-full: 46.664 Wh
energy-rate: 2.059 W
time to full: 13.6 minutes
percentage: 99%
icon-name: 'battery-full-charging-symbolic'
Daemon:
daemon-version: 0.99.11
on-battery: no
lid-is-closed: no
lid-is-present: yes
critical-action: HybridSleep
Device: /org/freedesktop/UPower/devices/line_power_ADP0
native-path: ADP0
power supply: yes
updated: Sun 08 Nov 2020 15:29:25 +10 (18 seconds ago)
has history: no
has statistics: no
line-power
warning-level: none
online: no
icon-name: 'ac-adapter-symbolic'
Device: /org/freedesktop/UPower/devices/battery_BAT0
native-path: BAT0
vendor: SUNWODA
model: R15B01W
serial: ACFA
power supply: yes
updated: Sun 08 Nov 2020 15:29:25 +10 (18 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: discharging
warning-level: none
energy: 46.198 Wh
energy-empty: 0 Wh
energy-full: 46.664 Wh
energy-full-design: 60.04 Wh
energy-rate: 1.998 W
voltage: 8.44 V
time to empty: 23.1 hours
percentage: 99%
capacity: 77.7215%
technology: lithium-ion
icon-name: 'battery-full-symbolic'
History (charge):
1604813365 99.000 charging
History (rate):
1604813365 1.998 charging
Device: /org/freedesktop/UPower/devices/line_power_ucsi_source_psy_USBC000o001
native-path: ucsi-source-psy-USBC000:001
power supply: yes
updated: Sun 08 Nov 2020 15:27:39 +10 (124 seconds ago)
has history: no
has statistics: no
line-power
warning-level: none
online: yes
icon-name: 'ac-adapter-symbolic'
Device: /org/freedesktop/UPower/devices/DisplayDevice
power supply: yes
updated: Sun 08 Nov 2020 15:29:25 +10 (18 seconds ago)
has history: no
has statistics: no
battery
present: yes
state: discharging
warning-level: none
energy: 46.198 Wh
energy-full: 46.664 Wh
energy-rate: 1.998 W
time to empty: 23.1 hours
percentage: 99%
icon-name: 'battery-full-symbolic'
Daemon:
daemon-version: 0.99.11
on-battery: no
lid-is-closed: no
lid-is-present: yes
critical-action: HybridSleep
