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Hello,
I have an LCD display connected to Rpi4 through HDMI-MIPI converter board. However, for some reason as soon as NanoDLP service triggers, the display is no longer connected and blue LED flashes on MIPI converter board.
Observations:
1. When Rpi is booting the display is detected and there is a green light on the MIPI converter board and the display is working as expected
2. But as soon as nanodlp service starts, the display is no longer connected and blue led flashes on mipi board.
3. To test this further, I disabled nanodlp.service and the display continued to work fine.
Looks like there is something wrong happening when nanodlp start which kicks out the display. Any pointers will help.
thanks!!
R
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Hi Rahul,
Try framebuffer see if it does improve things or not.
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Hello Shahin,
Was able to resolve the display issue. However, the display seems to be noisy, the calibration grids keeps jumping and even when print layers are previewed on display some stray pixels keep glowing.
I have recorded are small video to depict the issue. Link: https://drive.google.com/file/d/1wa1bav … sp=sharing
My Setup:
Rpi4 with nanoDLP build 7267 with 2K RGB 5.5" LCD
config.txt:
hdmi_pixel_encoding:0=2
hdmi_force_mode:0=1
hdmi_cvt:0=1440 2560 50 3 0 0 0
hdmi_group:0=2
hdmi_mode:0=87
hdmi_drive:0=2
hdmi_force_hotplug:0=1
config_hdmi_boost:0=4
framebuffer_width:0=1440
framebuffer_height:0=2560
max_framebuffer_width:0=1440
max_framebuffer_height:0=2560
Tried replacing Rpi, mipi converter board, and displays but the issue seems consistent. Any suggestion on fixing this.
thanks!
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Check if your display config exists here and correct.
https://docs.google.com/spreadsheets/d/ … gp5Vk/edit
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