No video signal in Pi4 with OS 64 bit

[guaxirreton]

Hi friends,
I'm using a Pi4 with Raspberry Pi OS 64bits as a pc just for easy and simple tasks like documents, navigate or download some files. Last months worked great until now.

Suddenly when I switch on appears the Raspberry logo and after that just black screen, not desktop as usual. I try to to do a new OS installation and works fine until I updated the system as requested at the end of installation. Same result, Raspberry logo and black screen.

The screen I'm using is an old Hannspree 19" that offers 1440 x 900 display resolution and 16:10 aspect ratio with and adapter HDMI to DVI. Until now worked ok. What's happening?? I don't know about programming but I try to delete the # from the config.txt on the HDMI safe mode but same result. I don't know what to do...

Thanks for your help

[kerry_s]

add to the front of /boot/cmdline.txt

Code: Select all

video=HDMI-A-1:1440x900

don't mess with config.txt, it's used for the legacy fkms driver, the current driver is kms.

[wuanche]

Same here.

After update to kernel 1:1.20230317-1. No video signal after logo.

[kerry_s]

Same here.

After update to kernel 1:1.20230317-1. No video signal after logo.

that doesn't help us help you. provide info.

what rpi model ?
what os version ?
how is it connected to the screen ? (micro to hdmi, adapter, switch, etc...)
make/model monitor/tv ?
resolution for monitor/screen ?
are you using a legit power source ? (a charger is not a power source, there are no batteries)
etc....

[wuanche]

Same here.

After update to kernel 1:1.20230317-1. No video signal after logo.

that doesn't help us help you. provide info.

what rpi model ?
what os version ?
how is it connected to the screen ? (micro to hdmi, adapter, switch, etc...)
make/model monitor/tv ?
resolution for monitor/screen ?
are you using a legit power source ? (a charger is not a power source, there are no batteries)
etc....

It is not a problem with my Raspberry Pi 4b,
I have no problem with kernel 1:1.20230106-1.

Anyway thank you.

[kerry_s]

have tried the kernel 6.1.*

Code: Select all

sudo rpi-update

[guaxirreton]

add to the front of /boot/cmdline.txt

Code: Select all

video=HDMI-A-1:1440x900

don't mess with config.txt, it's used for the legacy fkms driver, the current driver is kms.

Thanks for help but I try this and now the cmdline.txt is:

Code: Select all

video=HDMI-A-1:1440x900 console=serial0,115200 console=tty1 root=PARTUUID=f65fe2de-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles

Same result, appear Raspberry logo and black screen

[glyndon]

I fixed this by removing (commenting out) the kms overlay line in /boot/config.txt.
Display seems to work fine, but I probably lost OpenGL as a result.
Easier to wait for that to get fixed than to be without a display.

[aBUGSworstnightmare]

add to the front of /boot/cmdline.txt

Code: Select all

video=HDMI-A-1:1440x900

don't mess with config.txt, it's used for the legacy fkms driver, the current driver is kms.

Thanks for help but I try this and now the cmdline.txt is:

Code: Select all

video=HDMI-A-1:1440x900 console=serial0,115200 console=tty1 root=PARTUUID=f65fe2de-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles

Same result, appear Raspberry logo and black screen

change your kernel command line to

Code: Select all

video=HDMI-A-1:1440x900M@60D

[guaxirreton]

change your kernel command line to

Code: Select all

video=HDMI-A-1:1440x900M@60D

You mean in /boot/cmdline.txt ??

[guaxirreton]

Changed on cmdline.txt to video=HDMI-A-1:1440x900M@60D as mentioned and it's not working. Same result, after logo black screen. What an bad update from Raspberry Pi OS!!

[kerry_s]

I fixed this by removing (commenting out) the kms overlay line in /boot/config.txt.
Display seems to work fine, but I probably lost OpenGL as a result.
Easier to wait for that to get fixed than to be without a display.

try changing to the fkms driver instead.
dtoverlay=vc4-kms-v3d
to
dtoverlay=vc4-fkms-v3d

also while you have a display, if you could post the output of xrandr

like this

[HawaiianPi]

The screen I'm using is an old Hannspree 19" that offers 1440 x 900 display resolution and 16:10 aspect ratio with and adapter HDMI to DVI.

My old Samsung SyncMaster 940BW monitor has the same 1440x900 resolution and is connected to my Pi 4B in the same way (HDMI-DVI adapter) and I've had no trouble at all with that monitor, or the half dozen other displays I've tried.

What an bad update from Raspberry Pi OS!!

The problem isn't the OS, it's your monitor, which is sending incomplete or poorly formatted EDID information to the OS. The newer KMS graphics driver doesn't like displays that send bad EDID data.

The fix usually involves dumping EDID from the monitor to a file, then correcting the error and using that file instead of the monitor's EDID.

However, since you have already added video=HDMI-A-1:1440x900M@60D to cmdline.txt, try adding hdmi_ignore_edid=0xa5000080 to config.txt (which will tell the GPU to ignore the monitor's EDID).

Make sure everything in cmdline.txt is all on 1 line, and your additions are separated from the rest of the line with a single space delimiter.

[guaxirreton]

What an bad update from Raspberry Pi OS!!

The problem isn't the OS, it's your monitor, which is sending incomplete or poorly formatted EDID information to the OS. The newer KMS graphics driver doesn't like displays that send bad EDID data.

The fix usually involves dumping EDID from the monitor to a file, then correcting the error and using that file instead of the monitor's EDID.

However, since you have already added video=HDMI-A-1:1440x900M@60D to cmdline.txt, try adding hdmi_ignore_edid=0xa5000080 to config.txt (which will tell the GPU to ignore the monitor's EDID).

Make sure everything in cmdline.txt is all on 1 line, and your additions are separated from the rest of the line with a single space delimiter.
[/quote]

This is my config.txt right now and same result, black screen:

Code: Select all

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

# Automatically load overlays for detected cameras
camera_auto_detect=1

# Automatically load overlays for detected DSI displays
display_auto_detect=1

# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2

# Run in 64-bit mode
arm_64bit=1

# Disable compensation for displays with overscan
disable_overscan=1

# hdmi_ignore_edid=0xa5000080

[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

[all]

[pi4]
# Run as fast as firmware / board allows
arm_boost=1

[all]

[dom]

This is my config.txt right now and same result, black screen:

Remove any video related changes in /boot/cmdline.txt and run

Code: Select all

raspinfo | pastebinit

and post the url

("sudo apt install pastebinit" if it's not currently installed).

[guaxirreton]

I fixed this by removing (commenting out) the kms overlay line in /boot/config.txt.
Display seems to work fine, but I probably lost OpenGL as a result.
Easier to wait for that to get fixed than to be without a display.

try changing to the fkms driver instead.
dtoverlay=vc4-kms-v3d
to
dtoverlay=vc4-fkms-v3d

also while you have a display, if you could post the output of xrandr

like this

I'm sorry but I don't know how to change the fkms driver

[guaxirreton]

This is my config.txt right now and same result, black screen:

Remove any video related changes in /boot/cmdline.txt and run

Code: Select all

raspinfo | pastebinit

and post the url

("sudo apt install pastebinit" if it's not currently installed).

How can I run this if I don't have image on my screen??