No display with Jupiter

Jupiter
1

I’m able to log in over UART. No error jump out at me in journalctl, but when I connect the HDMI cable dmesg has:

[  893.536496] [drm] spacemit_hdmi_connector_detect() hdmi status connected
[  893.568417] [drm] spacemit_hdmi_connector_detect() hdmi status connected
[  893.568487] [drm] spacemit_hdmi_get_edid_block() len 128
[  893.589910] [drm] spacemit_hdmi_get_edid_block() len 128
[  893.826707] [drm] spacemit_crtc_atomic_enable(power on)
[  893.826828] [drm] dpu_init
[  893.927288] [drm:dpu_init] *ERROR* dpu_init wait cfg ready done timeout
[  893.934066] [drm] spacemit_hdmi_encoder_enable()
[  893.934124] [drm] spacemit_hdmi_setup() id 0xa28501, hdmi 8bpc
[  893.934438] [drm] DPU type 0 id 2 Start!
[  893.934467] [drm:dpu_isr] *ERROR* Under Run! DPU_Mclk = 0, DPU BW = 0

Is this relevant to the issue? Where else should I look?

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2

My monitor’s optimal resolution is 2560x1440. It’s able to display 1920x1440, which is the maximum display size in the specs for the board. I thought that’d work fine. I guess not.

I bought a dinky little monitor and it works with the Jupiter.

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3

I have 2 monitors, an old 1360x768 and a new 1920x1280, and Jupiter displays images on both monitors without any problems.

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