Upgrade from 1.20250305 to 1.20250326, display no longer works

[op1407]

Firmware upgrade caused the touchscreen display to stop working. No image, just scrambled lines.
Tried to manually downgrade the firmware, went back too far to version 6.6.xx, display worked but there were other unrelated issues.

It has been confirmed that the display works, Raspi 5 works, ports (USB,HDMI) works.

pi@LucyPi5:~ $ uname -a
Linux LucyPi5 6.12.22-v8-16k+ #1871 SMP PREEMPT Mon Apr  7 13:45:56 BST 2025 aarch64 GNU/Linux

pi@LucyPi5:~ $ vcgencmd version
2025/04/08 00:16:47
Copyright (c) 2012 Broadcom
version 50beecf0 (release) (embedded)

There was a bug fix for a another type of display, that why the firmware was updated to 6.12.22. It didn't help my case.

/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

# 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

![Image](https://github.com/user-attachments/assets/3f8ce10f-72ea-4255-8b3c-cf87340882bc)

![Image](https://github.com/user-attachments/assets/c157566e-a79f-41f5-90ee-01067b7ec9ae)

[cm5]
dtoverlay=dwc2,dr_mode=host

[all]

dtoverlay=vc4-fkms-v3d
max_framebuffers=2

lcd_rotate=2
start_x=1
gpu_mem=256

hdmi_blanking=1

hdmi_group=2
hdmi_mode=87
hdmi_cvt=1024 600 60 0 0 0
display_hdmi_rotate=3

hdmi_force_hotplug=1

hdmi_driver=2
#usb_max_current_enable=1

#device_tree_address=0x03000000
#enable_tvout=0

Display:
RPI DIS10180P
Elecrow RC101S 10 1024x600 IPS

[pelwell]

That display has an HDMI interface, so it shouldn't need any special configuration unless the EDID is dodgy in some way. I'm bothered by all the old hdmi_... config.txt settings - most of them have no effect on a Pi 5 (and never have), only hdmi_force_hotplug.

Things to try (separately):

1. Comment out disable_fw_kms_setup=1.
2. Change vc4-fkms-v3d to vc4-kms-v3d.

[op1407]

I've had some issues with the display from the start, that is why the config.txt is what it is. It used to work perfectly before the upgrade.

I've tried your suggestions,

That display has an HDMI interface, so it shouldn't need any special configuration unless the EDID is dodgy in some way. I'm bothered by all the old hdmi_... config.txt settings - most of them have no effect on a Pi 5 (and never have), only hdmi_force_hotplug.

Things to try (separately):

1. Comment out `disable_fw_kms_setup=1`.

2. Change `vc4-fkms-v3d` to `vc4-kms-v3d`.

The number 2 disabled the display completely, now it just says "No Signal", the number 1 didn't do anything.

[pelwell]

What desktop/app are you running?

[popcornmix]

Boot with no sdcard (or other devices attached) and connected to hdmi.
Do you see a diagnostic screen? Report the "DISPLAY:" line.

[op1407]

What desktop/app are you running?

I'm using X11 because of unrelated problems with Wayland (Wayfire?)

Boot with no sdcard (or other devices attached) and connected to hdmi. Do you see a diagnostic screen? Report the "DISPLAY:" line.

display: DISP0: HPD=0 EDID=none #0 DISP1: HPD=0 EDID=none #0