[Bug 1876265] Re: Ubuntu Raspberry dpi18 display

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: u-boot (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1876265

Title:
  Ubuntu Raspberry dpi18 display

Status in u-boot package in Ubuntu:
  Confirmed

Bug description:
  I installed the Ubuntu 20.04 Raspberry version

  I tried to modify firmware/usrconfig.txt. Always the same result...

  After modifiying the desired configuration and reboot, the RPI4 enters
  a loop trying to boot: the color image blinks, and immediately turns
  off. Then boot again, a blink of the colored image, turn off... and so
  on.

  
  dtoverlay=i2c-gpio,bus=3,i2c_gpio_sda=23,i2c_gpio_scl=24,i2c_gpio_delay_us=2

  # DPI Video Setup
  dtoverlay=dpi18
  overscan_left=0
  overscan_right=0
  overscan_top=0
  overscan_bottom=0
  framebuffer_width=854
  framebuffer_height=480
  enable_dpi_lcd=1
  display_default_lcd=1
  dpi_group=2
  dpi_mode=87

  dpi_output_format=458773
  hdmi_timings=854 0 14 4 12 480 0 2 3 9 0 0 0 60 0 32000000 3

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