faraz ahmed

Hi, ive been trying to resolve the screen issue issue on my cb2 for a few days now, i cannot get it to work. I'm running Armbian_26.2.1_Bigtreetech-cb2_trixie_current_6.18.8_minimal, everything works. HDMI outputs to a 4K display just fine except for my small 5" display, which just stays black. The os has not been tempered with, i've flashed a fresh copy and used armbian-upgrade it, thats all. I've diagnosed the problem enough to see that its an EDID issue or the rk3566 just not likely my weird screen resolution. BTT os who also use armbian as a base somehow fixed this official issue. The display is being detected by the OS. My Armbian OS: root@bigtreetech-cb2:~# cat /sys/class/drm/card0-HDMI-A-1/status connected Display modes in my arbian is empty but BTT armbian fork has the correct modes. My Armbian OS: root@bigtreetech-cb2:~# cat /sys/class/drm/card0-HDMI-A-1/modes root@bigtreetech-cb2:~# BTT OS: root@bigtreetech-cb2:~# cat /sys/class/drm/card0-HDMI-A-1/modes 800x480 640x480 640x480 My Armbian OS: root@bigtreetech-cb2:~# dmesg | grep -Ei "hdmi|drm|edid|display" [ 0.093021] /vop@fe040000: Fixed dependency cycle(s) with /hdmi@fe0a0000 [ 0.093163] /hdmi@fe0a0000: Fixed dependency cycle(s) with /vop@fe040000 [ 0.131119] /hdmi@fe0a0000: Fixed dependency cycle(s) with /hdmi-con [ 0.131254] /hdmi-con: Fixed dependency cycle(s) with /hdmi@fe0a0000 [ 4.047126] rockchip-drm display-subsystem: bound fe040000.vop (ops vop2_component_ops [rockchipdrm]) [ 4.061272] dwhdmi-rockchip fe0a0000.hdmi: Detected HDMI TX controller v2.11a with HDCP (DWC HDMI 2.0 TX PHY) [ 4.062694] dwhdmi-rockchip fe0a0000.hdmi: registered DesignWare HDMI I2C bus driver [ 4.067059] rockchip-drm display-subsystem: bound fe0a0000.hdmi (ops dw_hdmi_rockchip_ops [rockchipdrm]) [ 4.068415] [drm] Initialized rockchip 1.0.0 for display-subsystem on minor 0 [ 4.249136] rockchip-drm display-subsystem: [drm] Cannot find any crtc or sizes [ 4.368820] rockchip-drm display-subsystem: [drm] Cannot find any crtc or sizes [ 8.271095] systemd[1]: Starting modprobe@drm.service - Load Kernel Module drm... [ 8.390055] systemd[1]: modprobe@drm.service: Deactivated successfully. [ 8.391059] systemd[1]: Finished modprobe@drm.service - Load Kernel Module drm. [ 10.653965] [drm] Initialized panfrost 1.4.0 for fde60000.gpu on minor 1 [ 11.256108] hdmi-audio-codec hdmi-audio-codec.12.auto: HDMI: Unknown ELD version 0 My Armbian OS: root@bigtreetech-cb2:~# edid-decode /sys/class/drm/card0-HDMI-A-1/edid edid-decode (hex): 00 ff ff ff ff ff ff 00 04 72 18 00 db 8d 10 20 01 16 01 03 80 0b 06 78 08 67 60 a2 5a 49 9e 23 13 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 91 0b 20 8c 30 e0 2d 10 10 3c 69 00 20 e0 31 00 00 18 00 00 00 fd 00 37 41 1e 28 03 00 0a 20 20 20 20 20 20 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc 00 41 63 65 72 20 47 35 30 0a 20 20 20 20 01 27 02 03 1a 41 47 01 01 01 01 01 01 01 23 09 07 07 83 01 00 00 65 03 0c 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 ---------------- Block 0, Base EDID: EDID Structure Version & Revision: 1.3 Vendor & Product Identification: Manufacturer: ACR Model: 24 Serial Number: 537955803 Made in: week 1 of 2012 Basic Display Parameters & Features: Digital display Maximum image size: 11 cm x 6 cm Gamma: 2.20 RGB color display Color Characteristics: Red : 0.6337, 0.3535 Green: 0.2861, 0.6201 Blue : 0.1376, 0.0761 White: 0.3125, 0.3281 Established Timings I & II: none Standard Timings: none Detailed Timing Descriptors: DTD 1: 800x480 60.000000 Hz 5:3 31.500 kHz 29.610000 MHz (800 mm x 480 mm) Hfront 16 Hsync 60 Hback 64 Hpol N Vfront 6 Vsync 9 Vback 30 Vpol N Display Range Limits: Monitor ranges (GTF): 55-65 Hz V, 30-40 kHz H, max dotclock 30 MHz Dummy Descriptor: Display Product Name: 'Acer G50' Extension blocks: 1 Checksum: 0x27 ---------------- Block 1, CTA-861 Extension Block: Revision: 3 Basic audio support Native detailed modes: 1 Video Data Block: VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz Audio Data Block: Linear PCM: Max channels: 2 Supported sample rates (kHz): 48 44.1 32 Supported sample sizes (bits): 24 20 16 Speaker Allocation Data Block: FL/FR - Front Left/Right Vendor-Specific Data Block (HDMI), OUI 00-0C-03: Source physical address: 1.0.0.0 Checksum: 0x10 BTT OS: root@bigtreetech-cb2:~# edid-decode /sys/class/drm/card0-HDMI-A-1/edid edid-decode (hex): 00 ff ff ff ff ff ff 00 04 72 18 00 db 8d 10 20 01 16 01 03 80 0b 06 78 08 67 60 a2 5a 49 9e 23 13 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 91 0b 20 8c 30 e0 2d 10 10 3c 69 00 20 e0 31 00 00 18 00 00 00 fd 00 37 41 1e 28 03 00 0a 20 20 20 20 20 20 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc 00 41 63 65 72 20 47 35 30 0a 20 20 20 20 01 27 02 03 1a 41 47 01 01 01 01 01 01 01 23 09 07 07 83 01 00 00 65 03 0c 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 ---------------- Block 0, Base EDID: EDID Structure Version & Revision: 1.3 Vendor & Product Identification: Manufacturer: ACR Model: 24 Serial Number: 537955803 Made in: week 1 of 2012 Basic Display Parameters & Features: Digital display Maximum image size: 11 cm x 6 cm Gamma: 2.20 RGB color display Color Characteristics: Red : 0.6337, 0.3535 Green: 0.2861, 0.6201 Blue : 0.1376, 0.0761 White: 0.3125, 0.3281 Established Timings I & II: none Standard Timings: none Detailed Timing Descriptors: DTD 1: 800x480 60.000 Hz 5:3 31.500 kHz 29.610 MHz (800 mm x 480 mm) Hfront 16 Hsync 60 Hback 64 Hpol N Vfront 6 Vsync 9 Vback 30 Vpol N Display Range Limits: Monitor ranges (GTF): 55-65 Hz V, 30-40 kHz H, max dotclock 30 MHz Dummy Descriptor: Display Product Name: 'Acer G50' Extension blocks: 1 Checksum: 0x27 ---------------- Block 1, CTA-861 Extension Block: Revision: 3 Basic audio support Native detailed modes: 1 Video Data Block: VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz Audio Data Block: Linear PCM: Max channels: 2 Supported sample rates (kHz): 48 44.1 32 Supported sample sizes (bits): 24 20 16 Speaker Allocation Data Block: FL/FR - Front Left/Right Vendor-Specific Data Block (HDMI), OUI 00-0C-03: Source physical address: 1.0.0.0 Checksum: 0x10 I don't even know if this info is relavent, im new to armbian...so if u need anything else to diagnose this issue, let me know.