Problem with Pi 5 and old HDMI TV output ( fixed )

[dewen]

Sorry I have a problem with Pi 5 and old HDMI TV output, not direct with PeppyMeter, but hope someone had similar problem can help me, thank you !

I use an old LCD TV ( 2007 SONY KLV-32U300A ), it support FHD HDMI input ( 1920x1080P ).

On Pi 4, the Volumio will first recognize it as a 720P TV resolution and overscan, but it can be fixed by adding the following line to to /boot/userconfig.txt to force it accept 1920x1080P without overscan.

hdmi_group=2
hdmi_mode=87
hdmi_cvt 1920 1080 60 3 0 0 0
hdmi_drive=2
disable_overscan=1
overscan_left=29
overscan_right=29
overscan_top=29
overscan_bottom=29
framebuffer_width=1920
framebuffer_height=1080

But in Pi 5, this method is not working.
TV first shows 1080P at TEXT boot process, but soon become 720P.

I tried add
video=HDMI-A-1:1920x1080@60D
to /boot/cmdline.txt
then the boot TEXT is 1080P, but after Touch Display plugin install and enabled ( volumio now playing screen ), it become 720P again.

I tried upgrade to newest Volumio BETA but still the same result.

Also noticed that Pi 5 HDMI Audio output, no hardware mixer type ( but Pi 4 has it ).

I think it is due to my 2007 LCD TV HDMI is too old, the EDID can not be recognized by Pi 5, or Pi 5 has some issue with HDMI ?
I search and find that some waveshare screen also has problem with Pi 5 HDMI but can be fixed by edit EDID, but I cannot get my TV’s EDID ( don’t know how ).

Issues with RPi5 + Waveshare HDMI display

I’m away from Pi5 but still searching and: I done all changes in cmdlines.txt without succes, Pi5 not react like Pi4. Last changes: sudo nano /boot/firmware/cmdline.txt was not possible because cmdline.txt is in /boot and I edit it on /boot directory. Maybe here is problem?? Today morning I found this : “NOTE: for Bookworm, the file is at /boot/firmware/cmdline.txt” Maybe it is reason why Pi5 not react when I changed cmdline.txt?? What you think about it?? I will try later add copy of c…

Is there any suggestion I can try ? thank you !

PS. Pi 5 HDMI works on my 2011 newer FDH TV, so it is due to my 2007 LCD TV is too old, but I hope there can be a fix like Pi 4 did.

Pi 5 8GB firmware 2024.1.5
Volumio 3.637. Kernel 6.1.69-V8+

should I upgrade Pi 5 firmware ?

EDIT : The problem solved by using alternative EDID ( 1080p_audio.zip), download/extract zip and put 1080p_audio.bin to /lib/firmware/
then add

drm.edid_firmware=HDMI-A-1:1080p_audio.bin video=HDMI-A-1:1920x1080M@60D,margin_left=29,margin_right=29,margin_top=29,margin_bottom=29

to the beginning of /boot/cmdline.txt
( 29 is the overscan value by try and error )

many thanks to gvolt, dvo, and wheaten !

[Wheaten]

Removed your posting from Peppy, as it’s not related to that plugin.

[dewen]

I am sorry and thank you for your kindly help !

[dvo]

@dewen

EDID

but i don’t know if it’s smart to play with this if you don’t know what your doing.

Section 2 : Service Mode (Factory Mode) - Sony KLV-26U300A Service Manual...

[dewen]

Thank you for the service manual, it’s useful, because the TV was pick up on the garbage for free, the remote function is broken, I will check it’s detail to see if I can fix it.
Thank you !

[dewen]

I don’t know hot to get my TV’s EDID, so I use the link’s EDID
https://forums.raspberrypi.com/viewtopic.php?t=358917&start=50#p2197745

download 1080p_audio.zip
extract it to /lib/firmware
add
drm.edid_firmware=HDMI-A-1:1080p_audio.bin video=HDMI-A-1:1920x1080M@60D
to /boot/cmdline.txt

then it works, Touch Display plugin shows 1080P,
only mild overscan, but the overscan cannot be fixed by
disable_overscan=1
overscan_left=29
overscan_right=29
overscan_top=29
overscan_bottom=29
( works on Pi4 ).

Anyway, a little progress from 720P to 1080P, only mild overscan but acceptable, thank you for the help.
If anyone know how to correct overscan on RPi5, please tell me, thank you !

[gvolt]

Did you try adding

disable_fw_kms_setup=0

to “/boot/userconfig.txt” without customizing “/boot/cmdline.txt”?

[dewen]

Thank you for the suggestion,
Just tried it, initial boot text is 1080P, then the TEXT went back to 720P, also Touch Display screen 720P.

[gvolt]

You could try if it possibly works to add margins to “/boot/cmdline.txt” like so:

drm.edid_firmware=HDMI-A-1:1080p_audio.bin video=HDMI-A-1:1920x1080M@60D,margin_left=29,margin_right=29,margin_top=29,margin_bottom=29

disable_fw_kms_setup=0 should then be removed from “/boot/userconfig.txt”, but you have probably already done that.

BTW: While the TV accepts 1080p format on its HDMI input its display has a physical resolution of only 1366x768 pixels (according to Specifications - Sony KLV-26U300A Service Manual [Page 4] | ManualsLib). So the automatically recognized mode (720p) is closer to the physical resolution than the forced 1080p.

[dewen]

Wow ! the margin_xxx=xxx command works like a charm !
Now it’s 1080P and overscan fixed, thank you very much !

The early SONY LCD TV seems often use the “fake” 1080P