On 29 October 2022 10:58:32 EEST, "José Expósito" <jose.exposito89@xxxxxxxxx> wrote: >Hi Mia, > >Thanks for testing :D > >On Sat, Oct 29, 2022 at 03:28:10AM +0300, Mia Kanashi wrote: >> Hello! >> >> Before device sends a battery report, you can notice garbage values in a power supply capacity. >> >> You can see this by running >> `watch -n0.1 cat /sys/class/power_supply/hid-28bd-935-battery/uevent` >> and then connecting the tablet. >> >> You can set it to a value here, but i think this is a problem in the global hid driver? > >That shouldn't be problematic, because the charging status should be >initially set to unknown and change to charging/discharging [1] once >the device sends the first report. > >Your desktop environment shouldn't display the battery percentage >while the status is unknown, so the initial values are ignored. > >Here is my output of my XP-Pen Deco SW before receiving the battery >percentage: > > POWER_SUPPLY_NAME=hid-28bd-933-battery > POWER_SUPPLY_TYPE=Battery > POWER_SUPPLY_PRESENT=1 > POWER_SUPPLY_ONLINE=1 > POWER_SUPPLY_MODEL_NAME=UGTABLET Deco Pro SW > POWER_SUPPLY_SCOPE=Device > >And after: > > POWER_SUPPLY_NAME=hid-28bd-933-battery > POWER_SUPPLY_TYPE=Battery > POWER_SUPPLY_PRESENT=1 > POWER_SUPPLY_ONLINE=1 > POWER_SUPPLY_CAPACITY=99 > POWER_SUPPLY_MODEL_NAME=UGTABLET Deco Pro SW > POWER_SUPPLY_STATUS=Discharging > POWER_SUPPLY_SCOPE=Device > >Jose > >[1] Actually it should be set to discharging until this gets merged: > https://lore.kernel.org/linux-input/20221028181849.23157-1-jose.exposito89@xxxxxxxxx/T/ Hello, for me it first looks like this: POWER_SUPPLY_NAME=hid-28bd-935-battery POWER_SUPPLY_TYPE=Battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_ONLINE=1 POWER_SUPPLY_MODEL_NAME=Hanvon Ugee Deco LW POWER_SUPPLY_SCOPE=Device Then it looks like this for a very brief (or not so brief) period of time, it also isn't always there, i suggest trying plugging it in multiple times: POWER_SUPPLY_NAME=hid-28bd-935-battery POWER_SUPPLY_TYPE=Battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_ONLINE=1 POWER_SUPPLY_CAPACITY=160 POWER_SUPPLY_MODEL_NAME=Hanvon Ugee Deco LW POWER_SUPPLY_STATUS=Discharging POWER_SUPPLY_SCOPE=Device Here value is 160, obvious garbage, it can have any other value depending on your luck. And then after that it looks like this: POWER_SUPPLY_NAME=hid-28bd-935-battery POWER_SUPPLY_TYPE=Battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_ONLINE=1 POWER_SUPPLY_CAPACITY=40 POWER_SUPPLY_MODEL_NAME=Hanvon Ugee Deco LW POWER_SUPPLY_STATUS=Discharging POWER_SUPPLY_SCOPE=Device >[1] Actually it should be set to discharging until this gets merged: > https://lore.kernel.org/linux-input/20221028181849.23157-1-jose.exposito89@xxxxxxxxx/T/ But i also currently applied this ^ patch, i will try testing without it and then report.
