Dear @Portisch, I have had this black screen/no signal issue for a long time and also with 20260812 as of today and like it be to solved if possible, Claude has helped me with the logs.
Full dmesg capture during the failure shows the driver explicitly failing the mode enable, not silently skipping it:
[292.654575] HDMITX_ERROR hdmitx_common_pre_enable_mode current hpd_state/suspend (1,1), exit
[292.654579] HDMITX_ERROR Record HDMI error: KMS_SKIP
[292.657053] HDMITX_ERROR mode enable fail
[292.657055] HDMITX_ERROR Record HDMI error: KMS_ERROR
[292.657107] [drm] meson_vout_update_mode_name: hdmitx update vout 1 name 1080p60hz.
[294.856285] [hdmitx:] Late Resume
The mode enable is attempted while the driver’s suspend flag is still set, so it exits early — and Late Resume only arrives 2.2 s afterwards. The enable is never retried, so the output stays dark while vout reports 1080p60hz and hpd_state reads 1.
kodi-send --action="RestartApp" recovers it by forcing a fresh atomic enable:
[459.240905] am_meson_crtc_atomic_enable-[0]: enable mode 1080p60hz final vmode 0
[459.241372] configure hdmitx21
[459.243048] enable phy to dig
[459.243054] hdmitx_set_dispmode
[459.283672] Sink is HDMI device
I would appreciate it if you would take a look at it, thanks.
Full logs:
Failure: https://paste.coreelec.org/WoundedAudrey
Recovered: https://paste.coreelec.org/DisarrayReeve