Amiberry 3.3 / RPi 4 slow

gordonfreemanjr

@dankcushions I like this suggestion. I’ll try that later today and get back to you. Thanks!

gordonfreemanjr

@dankcushions Both methods have failed. Same situation: black screen on startup, even with the preset theme and the ES script updated from source.

mitu

@gordonfreemanjr One last idea (filtering out 4k modes at the source) - add to config.txt:

[hdmi:0]
hdmi_max_pixel_freq=200000000
[hdmi:1]
hdmi_max_pixel_freq=200000000

Remove the hdmi_safe option and comment out the hdmi_group/hdmi_mode options (if still enabled).

gordonfreemanjr

@mitu Ok, so the „safe”, „mode” and „group” options are now commented out, and the „pixel freq” options are on.

The ES boots fine. The HOME button on my Smart TV remote displays the following info:

3840x2160 / 30p
UHD

mitu

@gordonfreemanjr said in Amiberry 3.3 / RPi 4 slow:

3840x2160 / 30p
UHD

Based on the information above, I guess the 4k video modes aren't filtered. Can you post the config.txt with the latest modifications ?

gordonfreemanjr

@mitu Sure. Here:
https://pastebin.com/t9RYrdNn

Also, some screenshots:
https://ibb.co/rFKRj99
https://ibb.co/SPjw72F

mitu

@gordonfreemanjr The config looks ok. The only think that's a bit different than the stock config is enable_uart(added by a shutdown script maybe ?), but that shouldn't affect the video resolution stuff.

gordonfreemanjr

@mitu I just called Samsung and they confirmed that upscaling the resolution is what a Smart TV does and there’s no internal setting to change it.

...

Still, when I connect the Pi via HDMI, the TV asks me what kind of equipment it is. I usually pick Game Console. Maybe I should ID the Pi as something else to avoid the upscaling? A decoder? A toaster?

At the same time I find it weird that I’m the first RPi4/Smart TV user to encounter an error like this one.

Cna

@mitu I know nothing about Rpi4 but i encoutered real slowdowns on Rpi3 with enable_uart=1 which set core_freq to 250Mhz instead of 400Mhz on Pi3.
You may give a try on removing this.

quicksilver

@cna that setting doesn't seem to affect the gpu core frequency on the pi 4 the way it does on previous pi models. With it on I still get 500mhz frequency for the core clock.

mitu

@gordonfreemanjr said in Amiberry 3.3 / RPi 4 slow:

I just called Samsung and they confirmed that upscaling the resolution is what a Smart TV does and there’s no internal setting to change it.

That's not exactly true. When using hdmi_safe, it reported the resolution correctly (640x480).

quicksilver

@gordonfreemanjr the solution @mitu suggested to limit the maximum resolution doesnt work by itself on my vizio tv either for some reason (it should work but I have learned my vizio has some weird quirks)

What worked for me was also setting this in my config.txt

hdmi_ignore_edid=0xa5000080

gordonfreemanjr

@quicksilver Thx. Was that the only additional line or have you included the one @mitu proposed as well?

quicksilver

@gordonfreemanjr That setting plus mitu's works for me.

gordonfreemanjr

@quicksilver IT WORKS.

This is the only combination of settings that did it for me. Both need to be active at the same time. Now, when I press the HOME remote button to inspect the resolution, it's 1080p / 60 - and it shows in the emulation speed. For the first time ever, Amiberry works at full speed.

This is the gamechanger for me.

@quicksilver @mitu Thank you both for your help. It's been a long topic and couple days, but this is it. It works.

Thank you!

So, to sum up. The final working combination to fix the resoution for the RPi4/Samsung Smart TV combo:

[hdmi:0]
hdmi_max_pixel_freq=200000000
[hdmi:1]
hdmi_max_pixel_freq=200000000
hdmi_ignore_edid=0xa5000080

mitu

@gordonfreemanjr Well, glad you sorted it out.

I'm wondering if the TV's EDID is not broken and/or lying about the TV's capabilities. Can you get the EDID contents from the TV with

tvservice -d myTV.edid
base64 myTV.edid

then post the output of the last command.

gordonfreemanjr

@mitu Sure. If you don't mind, I'll just attach the .edid file itself. My Ubuntu is unable to open in correctly.
https://we.tl/t-VITH1B471s

That’s how it appears on the screen though:
https://ibb.co/wKk2p4L

mitu

@gordonfreemanjr said in Amiberry 3.3 / RPi 4 slow:

@mitu Sure. If you don't mind, I'll just attach the .edid file itself. My Ubuntu is unable to open in correctly.

It's a small binary file which isn't meant to be seen as a text file. You need a program to decode it - like edid-decode- , and see the details.

I don't see anything out of the ordinary here, apart from the 4k video modes being filtered out (probably because of the configuration).

gordonfreemanjr

@mitu @quicksilver Our case has made it to Amiberry FAQ:

https://github.com/midwan/amiberry/wiki/FAQ

slimbrick

[EDIT: I fixed my issue, so I tried to delete the post but it wouldn't let me]