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Display is blank.

2025-04-09 19:13:54 Ask

I have followed your guide to enable the display, but it displays nothing.

-------------------

dmesg |grep -i bcm2708_fb

[    0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_headphones=0 cgroup_disable=memory snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=480 bcm2708_fb.fbheight=480 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  console=tty1 root=PARTUUID=f4ba3254-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=SE

[    1.389509] bcm2708_fb soc:fb: FB found 1 display(s)

[    1.397454] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 480x480


----------------------------

cat /boot/firmware/config.txt

# For more options and information see

# http://rptl.io/configtxt

# Some settings may impact device functionality. See link above for details


# Uncomment some or all of these to enable the optional hardware interfaces

#dtparam=i2c_arm=on

#dtparam=i2s=on

dtparam=spi=on


# Enable audio (loads snd_bcm2835)

dtparam=audio=on


# Additional overlays and parameters are documented

# /boot/firmware/overlays/README


# Automatically load overlays for detected cameras

camera_auto_detect=1


# Automatically load overlays for detected DSI displays

display_auto_detect=1


# Automatically load initramfs files, if found

auto_initramfs=1


# Enable DRM VC4 V3D driver

#dtoverlay=vc4-kms-v3d

#max_framebuffers=2

dtoverlay=lcd154:rotate=270

hdmi_force_hotplug=1

max_usb_current=1

hdmi_group=2

hdmi_mode=1

hdmi_mode=87

hdmi_cvt 480 480 60 6 0 0 0

hdmi_drive=2

display_rotate=0

dtoverlay=dwc2,dr_mode=host

avoid_warnings=1


# Don't have the firmware create an initial video= setting in cmdline.txt.

# Use the kernel's default instead.

disable_fw_kms_setup=1


# Run in 64-bit mode

arm_64bit=1


# Disable compensation for displays with overscan

disable_overscan=1


# Run as fast as firmware / board allows

arm_boost=1


[cm4]

# Enable host mode on the 2711 built-in XHCI USB controller.

# This line should be removed if the legacy DWC2 controller is required

# (e.g. for USB device mode) or if USB support is not required.

otg_mode=1


[cm5]

dtoverlay=dwc2,dr_mode=host


[all]

---------------------------------

ls -la /usr/local/bin/fbcp

-rwxr-xr-x 1 root root 13088 Apr  9 12:53 /usr/local/bin/fbcp


--------------------------

cat /etc/rc.local

sleep 7


fbcp &


exit 0


------------


what am i missing?



rpi LCDdisplay blank not working
3answers
SpotPearGuest732ef
Answer time:
2025-04-09 20:32:42

what is your raspberry pi OS version ?   bookworm or bluseye ?

Do you have tried our pre-configured image 》? pre-configured image  will work for you ?

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SpotPearGuest2494d
Answer time:
2025-04-10 14:28:24

running bookworm, I tried the preconfigurted image, it does not boot on any of my PI's 3B+/4B/5B/zero w2/zero w.

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SpotPearGuest732ef
Answer time:
2025-04-10 21:43:39

https://spotpear.com/index/contact/index.html

contact my WhatsApp  or email   services01@spotpear.com

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Price: $15.89
Part Number: rpi-1.54inch-lcd
Brand: Spotpear