Y2Linux 1.0 Beta 8.40 (Baseline 154)

Status: PUBLISHED as GitHub release baseline-154 (2026-10-27) at the owner's word ("do the fix and push as 8.40"), then installed and checked on the owner's player (see On the player). Release 1.0.0-beta.8.40, Reborn 1.0.0-beta.8.40, kernel 6.18.56-y2linux-1.0.0-beta.8.40, update sequence 10500, root 2026.08-platform-v1.196, Linux 1b09963, Reborn 77c54e2. Built with tools/production/release.py (107 s, resumed workspace, update based on baseline-153): container suite 885 OK, host suite 912 OK; all seal checks PASS, no MediaTek firmware in any image. Milestone audit BETA-8.40 in roadmap-gap-audit.

Image	SHA-256
BOOTIMG	`f5c6992d9fd9b38a6ee1578d77415ad85b0295f48ee7429f8fc395a9fac470c9`
Y2ROOT	`313305ef9dfcee77a98b80603283737ed5434b224885311a765df55bae135e0a`
RECOVERY	`15baf379bed46d094ecb695ccd417965c46acfa3c21eb49f0833d539d15dd2da`
Y2DATA (no SSH key)	`1464783324f7644909ab887de0f4d660ffa03607ec65fb36a3ba6d7b001a53b2`

What changed since Beta 8.39

Change	Detail	Evidence
Power off on a charger opens the charging screen (ledger F46, install 02f46e9f)	Before, Power Off with a cable plugged in switched the player fully off and it never charged until the cable was plugged in again: the MT6323 power-down left the charger detected with no new plug-in to wake it. Now, as on stock, a charger at power-off restarts the player into the bootloader's charging mode, which shows the Y2Linux charging screen; unplugging there switches off, a Power hold starts the player. Without a charger, power off is unchanged	report 149a9d81 (off at 40 % while charging, 40 % again 39 min later); fleet power journals (74 → 74 % after 14 h, 71 → 71 % after 12 h, 57 → 57 % after 9 h off on a charger); REA below; `tests/test_poweroff_charger.py`

How the restart reaches the charging screen

Stock mt_power_off (FM kernel 0xc04a1100) loops on pmic_chrdet_status() and calls arch_reset; the stock
charger restart (0xc049622c → wd_sw_reset(0) → wdt_arch_reset 0xc0541d10) clears EN, IRQ, AUTO_RESTART and DUAL in WDT_MODE (bic 0x59), keeps the external PMIC reset and resets the SoC.
The stock preloader reports such a reset as "SW reset without bypass power key flag", i.e. boot reason 3. Our
ordinary restart keeps AUTO_RESTART set (patch 0037), which gives reason 4.
Stock LK is_force_boot (0x81e166f4) forces a normal boot only for an alarm, META, a held Power key, reason 4 or
reason 6. Otherwise kernel_power_off_charging_detection (0x81e16778) picks mode 8 while a charger is present, or powers off. Mode 8 is Y2Linux's offline charging (y2-offline-charge).
Kernel: y2_charger_power_off (kernel/platform/mt6323-charger.c) is a high-priority power-off handler. It
runs after every driver's shutdown, so charging is already inhibited. It reads CHR_CON0 bit 5 and, with a charger, writes the stock reset (kernel/platform/poweroff-policy.h). Otherwise it does nothing and the BBPU power-off follows. The charger node references the RGU (innioasis,rgu = <&rgu>). It maps the RGU without claiming it, since the watchdog driver owns it.

No platform userspace, Reborn (identity only), memory map, partition or packaging change.

On the player

Owner's player (ST7701S panel, stock LK), 8.39 → 8.40 by staged OTA: install 18.1 s, back in ≈70 s, Acknowledged on health boot 1, no "stays off" warning from the charger driver.

Step	Result
Power Off (`y2-platform shutdown poweroff --reason user`) while Charging	Host USB: the gadget left, 5.6 s later the MediaTek preloader (`0e8d:2000`) enumerated for 2.8 s (a restart; before the fix nothing appeared). The owner saw the charging screen
Hold Power on that screen	`Y2BOOT: loader metadata valid=1 mode=8 reason=3 offline=1`, `Y2CHARGE: offline mode=8 reason=3 battery=4117016uV`, `deliberate Power release; normal boot`; the previous boot's log ends with `charger attached: restart into charging mode`
Power Off on the charger again, unplug on the charging screen, plug in again	The next start was `mode=8 reason=1`: a fresh power-on from the plug-in, so the player had really switched off after the unplug

Open

The reporter (02f46e9f) also sees a Rockbox boot picture before Y2Linux. Y2Linux never writes LOGO or UBOOT, and
that player's LK is not the stock v3.2.0 one (prefix SHA-256 bd001af2…). Advice: flash the stock logo.bin to LOGO only.