Moode 4.2 Problem with 5" HDMI screen

[seta_vn]

Hi,

i just updated to moode 4.2 and i encountered a problem with my old 5" 800x600 tft HDMI screen. This is not a problem with Moode 4.1, i have activated both Local UI & Touch Screen but the HDMI screen still show only a black screen. I also have added these following codes into the config.txt:

# Uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=2
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0

[Tim Curtis]

You could try to get some information from the tvservice util. moOde uses the -p and -o args to turn ON/OFF the HDMI port.

Code:

pi@rp5:~ $ tvservice --help
Usage: tvservice [OPTION]...
 -p, --preferred                   Power on HDMI with preferred settings
 -e, --explicit="GROUP MODE DRIVE" Power on HDMI with explicit GROUP (CEA, DMT, CEA_3D_SBS, CEA_3D_TB, CEA_3D_FP, CEA_3D_FS)
                                     MODE (see --modes) and DRIVE (HDMI, DVI)
 -t, --ntsc                        Use NTSC frequency for HDMI mode (e.g. 59.94Hz rather than 60Hz)
 -c, --sdtvon="MODE ASPECT [P]"    Power on SDTV with MODE (PAL or NTSC) and ASPECT (4:3 14:9 or 16:9) Add P for progressive
 -o, --off                         Power off the display
 -m, --modes=GROUP                 Get supported modes for GROUP (CEA, DMT)
 -M, --monitor                     Monitor HDMI events
 -s, --status                      Get HDMI status
 -a, --audio                       Get supported audio information
 -d, --dumpedid <filename>         Dump EDID information to file
 -j, --json                        Use JSON format for --modes output
 -n, --name                        Print the device ID from EDID
 -h, --help                        Print this information

-Tim

[seta_vn]

I have tried those commands but the screen is still black, in the old moode 4.1 all i have to do is enable the Local UI display function..

[Tim Curtis]

Post output from tvservice -s and I'll have a look.

-Tim

[seta_vn]

pi@moode:~ $ tvservice --status
state 0x12000a [HDMI DMT (87) RGB full 15:9], 800x480 @ 59.00Hz, progressive

This is all i got with the status command

[seta_vn]

Also, i don't know if this is a power supply issue introduce with the new Raspbian Stretch, after the installation of stretch it show an under voltage warning (but no red light on Pi) but after moode installed it disappear. This is very strange as i never got this warning before with moode 4.1 or Volumio.

I will try to look at the power supply board to see if this is the root of the problem.

[seta_vn]

I have changed to a new PSU board but the screen is still black right after the terminal boot into Moode.

[seta_vn]

Post output from tvservice -s and I'll have a look.

-Tim

Hi Tim, you got time to look into this problem? if not is it possible to downgrade to 4.1

[Tim Curtis]

They were no obvious errors in the status output.

I would need one of these screens in order to attempt troubleshooting.

[TheOldPresbyope]

pi@moode:~ $ tvservice --status
state 0x12000a [HDMI DMT (87) RGB full 15:9], 800x480 @ 59.00Hz, progressive

This is all i got with the status command

@seta_vn

I wonder if tvservice is just reporting back the values set in your config.txt file.

Have a look at https://elinux.org/RPiconfig#Video, especially in the section titled "Which values are valid for my monitor?"

Regards,
Kent