Ubuntu 22.04 xu4 Cloudstation 2 - TFT Backlight sys setting disappeared

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koerhen
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Ubuntu 22.04 xu4 Cloudstation 2 - TFT Backlight sys setting disappeared

Post by koerhen »

Since the latest apt-get update && apt-get upgrade the kernel backlight settings in /sys disappeared and cannot be turned on. Therefore on the TFT screen nothing is visible.
My guess: Newest kernel linux-odroid-5422-next:armhf has been built without fb_hktft32 support ?


system: xdroid xu4 Cloudstation 2

ls -R /sys/class/backlight
/sys/class/backlight:



uname -a
Linux odroid 6.1.90-21 #1 SMP PREEMPT Tue May 7 14:48:54 UTC 2024 armv7l armv7l armv7l GNU/Linux

lsb_release -r
Release: 22.04


cat /var/log/apt/history.log
Commandline: apt-get upgrade
Upgrade: libglib2.0-data:armhf (2.72.4-0ubuntu2.2, 2.72.4-0ubuntu2.3), ubuntu-pro-client-l10n:armhf (31.2.2~22.04, 31.2.3~22.04), distro-info-data:armhf (0.52ubuntu0.6, 0.52ubuntu0.7), libglib2.0-0:armhf (2.72.4-0ubuntu2.2, 2.72.4-0ubuntu2.3), linux-odroid-5422-next:armhf (6.1.77-20, 6.1.90-21), bootini:armhf (20220519-1, 20240507-2), ubuntu-advantage-tools:armhf (31.2.2~22.04, 31.2.3~22.04), linux-libc-dev:armhf (5.15.0-105.115, 5.15.0-107.117), ubuntu-pro-client:armhf (31.2.2~22.04, 31.2.3~22.04)

robcast
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Re: Ubuntu 22.04 xu4 Cloudstation 2 - TFT Backlight sys setting disappeared

Post by robcast »

My CloudStation display still works with the current 6.1.90 kernel but I had to set the overlay options in /media/boot/config.ini again:

Code: Select all

overlays="spi0 i2c0 i2c1 uart0 hktft-cs-ogst"
These users thanked the author robcast for the post (total 2):
odroid (Tue May 21, 2024 9:16 am) • koerhen (Tue May 21, 2024 9:28 am)

koerhen
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Re: Ubuntu 22.04 xu4 Cloudstation 2 - TFT Backlight sys setting disappeared

Post by koerhen »

Very useful information. My display works again after manually setting the overlay options in /media/boot/config.ini.
This file had obviously been overwritten during the last "apt-get upgrade".

Many thanks !

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