Make Custom Resolution Permanent

Biomecanoid · June 26, 2022 at 11:28 AM

Hello,

I use the following commands to add 4K 60hz resolution to Libreelec/Kodi because its missing from the list:

-----------------------------------------------------

cvt 3840 2160 60

xrandr --newmode "3840x2160_60.00" 712.75 3840 4160 4576 5312 2160 2163 2168 2237 -hsync +vsync

xrandr --addmode HDMI1 "3840x2160_60.00"

xrandr --output HDMI1 --mode "3840x2160_60.00"

-----------------------------------------------------

The commands work fine but upon reboot the settings are gone, how do i save the resolution permanently in Libreelec so that it will always appear in the GUI ?

GDPR-7 · June 26, 2022 at 4:23 PM

I guess it could be done via an script running at startup.

but I would also check the setting.

maybe you need to switch to expert or similar mode before: the most left bottom icon in the setting screen: multiple clicks on it

LE config addon:

=> system

* Resolution

* whitelist

don't know if LE has a default Resolution causing the switch back, but then the startup script should do the job

how and where to put a script running during boot:

https://wiki.libreelec.tv/configuration/useful_scripts

Biomecanoid · June 26, 2022 at 5:23 PM

Quote from JoeAverage

I guess it could be done via an script running at startup.
but I would also check the setting.
maybe you need to switch to expert or similar mode before: the most left bottom icon in the setting screen: multiple clicks on it
LE config addon:
=> system
* Resolution
* whitelist
don't know if LE has a default Resolution causing the switch back, but then the startup script should do the job
how and where to put a script running during boot:
https://wiki.libreelec.tv/configuration/useful_scripts

Display More

Sadly 4K 60hz is not in the whitelist - so i can not enable it from there but my TV does support it. I will try the startup script you suggested thanks

GDPR-7 · June 26, 2022 at 5:30 PM

I would check the vendor specs of your monitor regarding resolution/frequency ...

Biomecanoid · June 26, 2022 at 5:51 PM

Quote from JoeAverage

I would check the vendor specs of your monitor regarding resolution/frequency ...

My TV does support it if I switch to 4K 60Hz from command line it works fine , we have already establish that

GDPR-7 · June 26, 2022 at 9:49 PM

well, I'm the opinion when the box boots it configures the resolution of the monitor or what the monitor per default could do via a sort of handshake.

I could be wrong !

but when I'm not:

why doesn't that work for you (without manual intervention) ?

that's one part of the background of my suggestion.

the other was: running a monitor out of it's specs (if possible at all) wouldn't be good in long terms, I guess ...

**chewitt** · June 27, 2022 at 11:39 AM

You can put the commands in a simple script and then order the execution using a systemd service file in /storage/.config/system.d/ .. it's been a decade since I used LE on x86_64 hardware with X11 services so I have no idea which services you need in the after criteria, but this is the only way to say "after X11 services start, before kodi.target starts"

Biomecanoid · June 27, 2022 at 3:56 PM

Quote from chewitt

You can put the commands in a simple script and then order the execution using a systemd service file in /storage/.config/system.d/ .. it's been a decade since I used LE on x86_64 hardware with X11 services so I have no idea which services you need in the after criteria, but this is the only way to say "after X11 services start, before kodi.target starts"

Thanks for pointing me in the right direction. I am not 100% sure how to do it, is there a relevant short guide ?

**mglae** · June 27, 2022 at 4:23 PM

Quote from chewitt

but this is the only way to say "after X11 services start, before kodi.target starts"

This condition is already fulfilled for autostart.sh with After=graphical.target and Before=kodi.service.

But X11 startup may take so long that a sleep 3 or similar is required at start of the script.

Biomecanoid · June 27, 2022 at 4:34 PM

I made a startup.sh, but didn't work. I guess i didn't do it properly:

GDPR-7 · June 27, 2022 at 4:47 PM

the script is named *.bak and should end on *.sh, - I guess-

and

the autostart.sh has a "(" at the beginning and an ")&" at the end

Biomecanoid · June 27, 2022 at 5:48 PM

Quote from JoeAverage

the script is named *.bak and should end on *.sh, - I guess-
and
the autostart.sh has a "(" at the beginning and an ")&" at the end

Well after i tested it and didn't work i renamed it to *.bak

**smp** · June 27, 2022 at 6:48 PM

Try the nightly builds. 4k 60Hz should work as expected without any hacks.

Biomecanoid · June 27, 2022 at 8:57 PM

Quote from smp

Try the nightly builds. 4k 60Hz should work as expected without any hacks.

Thanks

**chewitt** · June 28, 2022 at 1:51 AM

Code

(
sleep 3
xrandr --newmode "3840x2160_60.00" 712.75 3840 4160 4576 5312 2160 2163 2168 2237 -hsync +vsync
xrandr --addmode HDMI1 "3840x2160_60.00"
xrandr --output HDMI1 --mode "3840x2160_60.00"
)&

^ Try that. It runs the commands in the background after waiting 3 secs for X11 to start. Even if 4K60 is working in nightles your issue is the EDID data read from HDMI does not provide that modeline, so you'll still need to add it.

Biomecanoid · July 2, 2022 at 8:13 PM

Thanks