On device the client's console log showed the calls: /usr/bin/steamos-polkit-helpers/steamos-update,
steamos-select-branch, jupiter-biosupdate and jupiter-dock-updater - the polkit-helpers path, not
/usr/bin. The missing steamos-update there was the 'Update Error' dialog. Stubs at both paths now.
Also seen on device: -steamdeck alone opts the install into the steamdeck_stable branch too, so the
branch guard is what keeps a session from reinstalling; and on the publicbeta channel Deck mode
reports installed version 0 at every start and reinstalls the same client (rc=42, the launch URL
lost with it), while on steamdeck_publicbeta the second launch comes up with no restart at all.
Deck mode passes -steamdeck alone: -steamos3 opted the install into the steamdeck_stable
branch and started the restart loop Bannerlator hit on device (38996ea1). The SteamOS helpers
the client calls in that mode - the two Armada found it needs under steamos-polkit-helpers and
the three under /usr/bin - are staged from the apk as no-op stubs. The client branch on disk is
kept in step with the one forced on the command line, and an update that cannot install stops
the session after three restarts instead of looping for ever.
The Steam cog gets a Client branch row: public beta (every session so far) or Steam Deck
public beta, the channel Armada bootstraps from.
The client reads /sys/class/power_supply/BAT<n>/; Android's supply is called battery and laid
out differently, so the Quick Access Menu had no battery. BatteryComponent writes BAT0 and BAT1
from Android's battery API every five seconds - status, percentage, charge, energy, power and
time to empty - into a directory bound over /sys/class/power_supply.
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