On Tue, 2022-07-19 at 11:38 +0200, Sebastian Arnhold wrote: > Dear developers, > > when using GNOME 42.3 on Wayland on my ASUS ExpertBook B5 Flip, it > reports my stylus battery to be stuck at 1% all the time, independent > of > its actual charging status. This is also independent from the stylus > I > use, as I've tried with two different ones. > > The battery device registers as ELAN9008:00 04F3:2E12 in GNOME energy > settings. > > The GNOME developers helped me track the bug down to upower, as > upower > itself shows the charging status to be stuck at 1%. The upower > developers then sent me here. > > My kernel version is 5.18 on an x86_64 architecture on Fedora 36. My > upower version is 0.99.19. > > Observed behaviour: Kernel reports 1% after pen is switched on and > touches the touchscreen for the first time. upower reports this to > GNOME > which then throws a "Battery low"-warning message. > Expected behaviour: Kernel reporting the correct charging percentage > from the pen to upower, or 0% if charging status cannot be > determined. > The latter would be a workaround since 0% seems to be ignored by > GNOME. > > Can you help me to resolve this bug? You'll probably want to implement a patch similar to this one: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f3193ea1b6779023334faa72b214ece457e02656 Cheers
