S1 Max Menu not showing

[TheFourthRing]

I've tried the latest version since it supported firmware 2.6.9.6 on my S1 Max and even tried it again today, and it seems to install fine, but going to the new Rinkhals menu on the printer only shows me 4 white squares. Nothing that I'm supposed to see. I've tried the installer, and the full update both. I'm in LAN mode and I don't know what else to try.

[martinbogo]

Hi @TheFourthRing,

I pulled the KS1 Max 2.6.9.6 firmware from our archive and tested our patch against that exact binary. The patch lands correctly, the menu tap is being intercepted, and the Rinkhals UI is being launched as intended. So this isn't an install or patching problem. Getting the four squares at all confirms that part works, since a bad patch would give you nothing when you tap the entry.

What you're hitting is a rendering issue inside the Rinkhals UI. Those four squares are the main menu buttons (Manage apps, App Store, Updates, Settings) drawing their backgrounds, but the icons and text labels on top aren't showing. Everything in that UI is drawn with runtime-loaded fonts, and on your printer that font rendering is coming up empty, which leaves blank tiles.

To find out why, the most useful thing is the UI log at /tmp/rinkhals/rinkhals-ui.log. It's written every time the UI launches, even when it renders blank, so it should show whether the fonts failed to load.

Rinkhals runs an SSH server, so you can pull it off the printer over your network:

1. Find the printer's IP. It's on the touchscreen under the network/WiFi settings, or in your router's list of connected devices.
2. From a computer on the same network, open a terminal (on Windows, PowerShell or PuTTY) and connect:

   ssh root@<printer-ip>
   

   The password is rockchip. If it asks about a fingerprint the first time, answer yes.
3. Once connected, print the log:

   cat /tmp/rinkhals/rinkhals-ui.log
   

   Copy that output into this thread.

If you'd rather get it as a file, plug in a USB stick and run cp /tmp/rinkhals/rinkhals-ui.log /mnt/udisk/ while connected, then read it on your computer.

A photo of the four-squares screen alongside the log would also help.

One question: is this the first time you've run the Rinkhals touch UI on this printer, or did it work on an earlier Rinkhals version before you updated for 2.6.9.6? That tells us whether it's specific to this build.

The S1 Max is a new machine and we don't have many examples in hand yet, so this report is genuinely useful for us.

[Kiwe94]

Hi @martinbogo

I'm from Germany and I have exactly the same issue on my Kobra S1 Max. The display only shows four white squares, and I can't select or interact with anything.

Because of this problem, I uninstalled Rinkhals again, since I like having access to my camera through the Anycubic app. Unfortunately, due to this display bug, I can't disable Streamer anymore.

Interestingly, Rinkhals is running perfectly fine on my Kobra S1 without any issues.

Thanks for the great work and all the effort you're putting into this project! ✌️

[TheFourthRing]

No such file or directory when I run the command to copy the log file. And this is the first time I've tried rinkhals due to my firmware version. It wasn't listed as working with 2.6.9.6 yet so I waited. And this is what happens.

[TheFourthRing]

debug-bundle_3830619272_20260620-231700.zip

Here is the debug bundle if it will help since I couldn't pull the log file.

[TheFourthRing]

Also, I did find a "rinkhals.log" file in there. Not sure if it helps but here it is,

root@kobra-ks1m-fd65:/tmp/rinkhals# cat /tmp/rinkhals/rinkhals.log Thu Jan 1 00:00:27 UTC 1970: Thu Jan 1 00:00:27 UTC 1970: [32197] Starting Rinkhals... Thu Jan 1 00:00:27 UTC 1970: -------------------------------------------------- Thu Jan 1 00:00:27 UTC 1970: | Kobra model: Anycubic Kobra S1 Max (KS1M) Thu Jan 1 00:00:27 UTC 1970: | Kobra firmware: 2.6.9.6 Thu Jan 1 00:00:27 UTC 1970: | Rinkhals version: 20260606_02 Thu Jan 1 00:00:27 UTC 1970: | Rinkhals root: /useremain/rinkhals/20260606_02-2 Thu Jan 1 00:00:27 UTC 1970: | Rinkhals home: /useremain/home/rinkhals Thu Jan 1 00:00:27 UTC 1970: -------------------------------------------------- Thu Jan 1 00:00:27 UTC 1970: > Stopping Anycubic apps... Thu Jan 1 00:00:27 UTC 1970: Killing 376 (./K3SysUi) Thu Jan 1 00:00:27 UTC 1970: Killing 400 (./gkcam) Thu Jan 1 00:00:27 UTC 1970: Killing 375 (./gkapi) Thu Jan 1 00:00:27 UTC 1970: Killing 336 (./gklib-a/tmp/unix_uds1printer.cfg) Thu Jan 1 00:00:28 UTC 1970: > Fixing permissions... Thu Jan 1 00:00:28 UTC 1970: > Preparing overlay... Thu Jan 1 00:00:29 UTC 1970: > Trimming old logs... Thu Jan 1 00:00:29 UTC 1970: > Starting SSH & ADB... Thu Jan 1 00:00:29 UTC 1970: /!\ ADB is not available Thu Jan 1 00:00:29 UTC 1970: > Preparing mounts... Thu Jan 1 00:00:29 UTC 1970: > Restarting Anycubic apps... Thu Jan 1 00:00:36 UTC 1970: > Starting apps... Thu Jan 1 00:00:36 UTC 1970: - Starting 10-hostname-dns (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/10-hostname-dns)... Thu Jan 1 00:00:36 UTC 1970: Setting hostname to: kobra-ks1m-fd65 Thu Jan 1 00:00:37 UTC 1970: - Starting 25-mainsail (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/25-mainsail)... Thu Jan 1 00:00:37 UTC 1970: - Starting 26-fluidd (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/26-fluidd)... Thu Jan 1 00:00:38 UTC 1970: - Starting 30-mjpg-streamer (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/30-mjpg-streamer)... Thu Jan 1 00:00:39 UTC 1970: - Starting 40-moonraker (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/40-moonraker)... Thu Jan 1 00:00:40 UTC 1970: - Skipped 50-remote-display (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/50-remote-display) as it is not enabled Thu Jan 1 00:00:40 UTC 1970: - Skipped 60-firmware-collector (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/60-firmware-collector) as it is not enabled Thu Jan 1 00:00:41 UTC 1970: - Skipped rinkhals-monitor (/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/rinkhals-monitor) as it is not enabled Thu Jan 1 00:00:41 UTC 1970: > Cleaning up... Thu Jan 1 00:00:41 UTC 1970: Rinkhals started Sat Jun 20 23:08:29 UTC 2026: Killing 756 (./gkcam) root@kobra-ks1m-fd65:/tmp/rinkhals#

[martinbogo]

Thanks Tom. That rinkhals.log is the boot log, and it all looks healthy: Rinkhals started cleanly, the printer is correctly detected as a Kobra S1 Max on 2.6.9.6, and all the apps came up fine. The UI assets (fonts and the LVGL module) are present on disk too, so this isn't a missing-files problem.

The file I actually need is the UI's own log. It's separate from the boot log and is only written when you open the Rinkhals menu, which is why it wasn't in the debug bundle. Could you:

1. Tap the Rinkhals entry so the four squares appear
2. Then over SSH run:

   cat /tmp/rinkhals/rinkhals-ui.log
   

3. Paste the output here

That file captures the UI's startup and will show exactly why the icons and text aren't drawing.

[Kiwe94]

I’m not a developer and have very limited coding knowledge, but I tried my best with the help of Codex (AI). The result may not be perfect, but perhaps it can serve as a starting point or provide some ideas that could help. Feel free or disregard any part of it if necessary.

Confirmed root cause:

On KS1M firmware 2.6.9.6 with Rinkhals 20260606_02, the touchscreen/K3SysUi launch path appears to start rinkhals-ui.sh without the Rinkhals environment variables.

Reproduction:

env -i /bin/sh /useremain/rinkhals/.current/opt/rinkhals/ui/rinkhals-ui.sh

Output:

-- Rinkhals UI --
Root: /useremain/rinkhals/.current

/useremain/rinkhals/.current/opt/rinkhals/ui/rinkhals-ui.sh: line 41: can't create /rinkhals-ui.log: Read-only file system
Done!

The script redirects Python output to:

python $RINKHALS_ROOT/opt/rinkhals/ui/rinkhals-ui.py >> $RINKHALS_LOGS/rinkhals-ui.log 2>&1

Because RINKHALS_LOGS is unset, this becomes /rinkhals-ui.log, which fails on the read-only root filesystem.

Expected fix:
rinkhals-ui.sh should set safe defaults before using these variables, especially:

RINKHALS_LOGS=${RINKHALS_LOGS:-/tmp/rinkhals}
RINKHALS_ROOT=${RINKHALS_ROOT:-$(cd "$(dirname "$0")/../../.." && pwd)}
KOBRA_MODEL_CODE=${KOBRA_MODEL_CODE:-KS1M}

and create the log directory before redirecting:

mkdir -p "$RINKHALS_LOGS"

[Kiwe94]

I followed the instructions exactly as you described. However, I still do not have access to the report/protocol.

As shown in the screenshot below, the file still cannot be opened. I would appreciate any further assistance in resolving this issue.

Thank you in advance.

I do it whit CMD as an Admin:
root@kobra-ks1m-0890:/root# cat /tmp/rinkhals/rinkhals-ui.log
cat: can't open '/tmp/rinkhals/rinkhals-ui.log': No such file or directory

I do it whit Powershell as an Admin:
root@kobra-ks1m-0890:/root# cat /tmp/rinkhals/rinkhals-ui.log
cat: can't open '/tmp/rinkhals/rinkhals-ui.log': No such file or directory

I cannot access this folder. I set the printer to Rinkhals and selected the 4 white boxes/images.

[TheFourthRing]

Ok, here is that output. Also on a side note, oddly enough, the menu is coming up when I choose the option below the rinkhals menu for "Export Logs to U-Disk." If I select that option right under "Rinkhals," I get the normal rinkhals menu. Hope that helps!

`root@kobra-ks1m-fd65:/root# cat /tmp/rinkhals/rinkhals-ui.log
INFO:root:Shell "python -c "import os, json; print(json.dumps(dict(os.environ)))"" => "{"USER": "root", "KOBRA_MODEL": "Anycubic Kobra S1 Max", "KOBRA_MODEL_ID": "20029", "SHLVL": "9", "LD_LIBRARY_PATH": "/userdata/app/gk:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/userdata/app/gk:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/oem/usr/lib:/oem/lib:", "HOME": "/useremain/home/rinkhals", "QT_QPA_EVDEV_MOUSE_PARAMETERS": "/dev/input/event0", "OLDPWD": "/userdata/app/gk", "RINKHALS_HOME": "/useremain/home/rinkhals", "user_debug": "31", "QT_ROOT": "/ac_lib/lib/qt", "PAGER": "/bin/more ", "PS1": "\u@\h:\w# ", "QT_QPA_PLATFORM_PLUGIN_PATH": "/ac_lib/lib/qt/plugins/platforms", "APP_STATUS_STARTED": "started", "USE_MUTABLE_CONFIG": "1", "ORIGINAL_ROOT": "/tmp/rinkhals/original", "TERM": "vt102", "RINKHALS_LOGS": "/tmp/rinkhals", "QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS": "/dev/input/event0:rotate=180", "PATH": "/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/ac_lib/lib/third_bin:/ac_lib/lib/wireless_tools/bin:/ac_lib/lib/sysstat/bin:/ac_lib/lib/openssh/bin:/ac_lib/lib/openssh/sbin:/ac_lib/app/kenv/python/bin:/ac_lib/lib/v4l-utils/bin:/ac_lib/lib/openssl/bin:/ac_lib/lib/curl/bin:/ac_lib/lib/firmware/bin:/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/bin:/sbin:/usr/bin:/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin", "QT_QPA_FB_HIDECURSOR": "1", "APP_STATUS_STOPPED": "stopped", "RINKHALS_VERSION": "20260606_02", "SHELL": "/bin/sh", "CXX": "/usr/bin/g++", "KOBRA_VERSION": "2.6.9.6", "storagemedia": "emmc", "KOBRA_DEVICE_ID": "740199538f954f501116290cbe43fd65", "KOBRA_MODEL_CODE": "KS1M", "QT_QPA_FONTDIR": "/ac_lib/lib/qt/fonts", "PWD": "/useremain/rinkhals/.current", "QT_QPA_PLATFORM": "linuxfb:fb=/dev/fb0:size=800x480:rotation=180:offset=0x0:nographicsmodeswitch", "RINKHALS_ROOT": "/useremain/rinkhals/20260606_02-2", "PYTHONPATH": "", "CC": "/usr/bin/gcc", "TZ": "UTC", "QT_PLUGIN_PATH": "/ac_lib/lib/qt/plugins", "EDITOR": "/bin/vi"}"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "694.8M / 5.7G (12%)"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "list_apps " => "10-hostname-dns 25-mainsail 26-fluidd 30-mjpg-streamer 40-moonraker 50-remote-display 60-firmware-collector rinkhals-monitor"
INFO:root:Shell "for a in $(list_apps); do echo "$a $(is_app_enabled $a)"; done" => "10-hostname-dns 1
25-mainsail 1
26-fluidd 1
30-mjpg-streamer 1
40-moonraker 1
50-remote-display 0
60-firmware-collector 0
rinkhals-monitor 0"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Disabling 26-fluidd...
INFO:root:Shell "disable_app 26-fluidd" => ""
INFO:root:Shell "get_app_status 26-fluidd" => "started"
INFO:root:Stopping 26-fluidd...
INFO:root:Shell "stop_app 26-fluidd" => "Killing 984 (lighttpd-D-f/useremain/rinkhals/20260606_02-2/home/rinkhals/apps/26-fluidd/light)"
INFO:root:Shell "is_app_enabled 26-fluidd" => "0"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "694.8M / 5.7G (12%)"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "694.8M / 5.7G (12%)"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "list_apps " => "10-hostname-dns 25-mainsail 26-fluidd 30-mjpg-streamer 40-moonraker 50-remote-display 60-firmware-collector rinkhals-monitor"
INFO:root:Shell "for a in $(list_apps); do echo "$a $(is_app_enabled $a)"; done" => "10-hostname-dns 1
25-mainsail 1
26-fluidd 0
30-mjpg-streamer 1
40-moonraker 1
50-remote-display 0
60-firmware-collector 0
rinkhals-monitor 0"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "694.8M / 5.7G (12%)"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "698.0M / 5.7G (13%)"
INFO:root:Exiting...

Killed
INFO:root:Shell "python -c "import os, json; print(json.dumps(dict(os.environ)))"" => "{"USER": "root", "KOBRA_MODEL": "Anycubic Kobra S1 Max", "KOBRA_MODEL_ID": "20029", "SHLVL": "9", "LD_LIBRARY_PATH": "/userdata/app/gk:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/userdata/app/gk:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/oem/usr/lib:/oem/lib:", "HOME": "/useremain/home/rinkhals", "QT_QPA_EVDEV_MOUSE_PARAMETERS": "/dev/input/event0", "OLDPWD": "/userdata/app/gk", "RINKHALS_HOME": "/useremain/home/rinkhals", "user_debug": "31", "QT_ROOT": "/ac_lib/lib/qt", "PAGER": "/bin/more ", "PS1": "\u@\h:\w# ", "QT_QPA_PLATFORM_PLUGIN_PATH": "/ac_lib/lib/qt/plugins/platforms", "APP_STATUS_STARTED": "started", "USE_MUTABLE_CONFIG": "1", "ORIGINAL_ROOT": "/tmp/rinkhals/original", "TERM": "vt102", "RINKHALS_LOGS": "/tmp/rinkhals", "QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS": "/dev/input/event0:rotate=180", "PATH": "/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/ac_lib/lib/third_bin:/ac_lib/lib/wireless_tools/bin:/ac_lib/lib/sysstat/bin:/ac_lib/lib/openssh/bin:/ac_lib/lib/openssh/sbin:/ac_lib/app/kenv/python/bin:/ac_lib/lib/v4l-utils/bin:/ac_lib/lib/openssl/bin:/ac_lib/lib/curl/bin:/ac_lib/lib/firmware/bin:/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/bin:/sbin:/usr/bin:/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin", "QT_QPA_FB_HIDECURSOR": "1", "APP_STATUS_STOPPED": "stopped", "RINKHALS_VERSION": "20260606_02", "SHELL": "/bin/sh", "CXX": "/usr/bin/g++", "KOBRA_VERSION": "2.6.9.6", "storagemedia": "emmc", "KOBRA_DEVICE_ID": "740199538f954f501116290cbe43fd65", "KOBRA_MODEL_CODE": "KS1M", "QT_QPA_FONTDIR": "/ac_lib/lib/qt/fonts", "PWD": "/useremain/rinkhals/.current", "QT_QPA_PLATFORM": "linuxfb:fb=/dev/fb0:size=800x480:rotation=180:offset=0x0:nographicsmodeswitch", "RINKHALS_ROOT": "/useremain/rinkhals/20260606_02-2", "PYTHONPATH": "", "CC": "/usr/bin/gcc", "TZ": "UTC", "QT_PLUGIN_PATH": "/ac_lib/lib/qt/plugins", "EDITOR": "/bin/vi"}"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "698.5M / 5.7G (13%)"
INFO:root:Shell "python -c "import os, json; print(json.dumps(dict(os.environ)))"" => "{"USER": "root", "KOBRA_MODEL": "Anycubic Kobra S1 Max", "KOBRA_MODEL_ID": "20029", "SHLVL": "9", "LD_LIBRARY_PATH": "/userdata/app/gk:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/userdata/app/gk:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/oem/usr/lib:/oem/lib:", "HOME": "/useremain/home/rinkhals", "QT_QPA_EVDEV_MOUSE_PARAMETERS": "/dev/input/event0", "OLDPWD": "/userdata/app/gk", "RINKHALS_HOME": "/useremain/home/rinkhals", "user_debug": "31", "QT_ROOT": "/ac_lib/lib/qt", "PAGER": "/bin/more ", "PS1": "\u@\h:\w# ", "QT_QPA_PLATFORM_PLUGIN_PATH": "/ac_lib/lib/qt/plugins/platforms", "APP_STATUS_STARTED": "started", "USE_MUTABLE_CONFIG": "1", "ORIGINAL_ROOT": "/tmp/rinkhals/original", "TERM": "vt102", "RINKHALS_LOGS": "/tmp/rinkhals", "QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS": "/dev/input/event0:rotate=180", "PATH": "/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/ac_lib/lib/third_bin:/ac_lib/lib/wireless_tools/bin:/ac_lib/lib/sysstat/bin:/ac_lib/lib/openssh/bin:/ac_lib/lib/openssh/sbin:/ac_lib/app/kenv/python/bin:/ac_lib/lib/v4l-utils/bin:/ac_lib/lib/openssl/bin:/ac_lib/lib/curl/bin:/ac_lib/lib/firmware/bin:/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/bin:/sbin:/usr/bin:/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin", "QT_QPA_FB_HIDECURSOR": "1", "APP_STATUS_STOPPED": "stopped", "RINKHALS_VERSION": "20260606_02", "SHELL": "/bin/sh", "CXX": "/usr/bin/g++", "KOBRA_VERSION": "2.6.9.6", "storagemedia": "emmc", "KOBRA_DEVICE_ID": "740199538f954f501116290cbe43fd65", "KOBRA_MODEL_CODE": "KS1M", "QT_QPA_FONTDIR": "/ac_lib/lib/qt/fonts", "PWD": "/useremain/rinkhals/.current", "QT_QPA_PLATFORM": "linuxfb:fb=/dev/fb0:size=800x480:rotation=180:offset=0x0:nographicsmodeswitch", "RINKHALS_ROOT": "/useremain/rinkhals/20260606_02-2", "PYTHONPATH": "", "CC": "/usr/bin/gcc", "TZ": "UTC", "QT_PLUGIN_PATH": "/ac_lib/lib/qt/plugins", "EDITOR": "/bin/vi"}"
[Warn] (79454.169, +79454169) lv_evdev_grab_device: ioctl EVIOCGRAB(1) failed: Device or resource busy lv_evdev.c:517
INFO:root:Exiting...

Killed
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "698.5M / 5.7G (13%)"
INFO:root:Exiting...

Killed
INFO:root:Shell "python -c "import os, json; print(json.dumps(dict(os.environ)))"" => "{"USER": "root", "KOBRA_MODEL": "Anycubic Kobra S1 Max", "KOBRA_MODEL_ID": "20029", "SHLVL": "9", "LD_LIBRARY_PATH": "/userdata/app/gk:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/lib:/usr/lib:/oem/usr/lib:/oem/lib:/userdata/app/gk:/ac_lib/lib/third_lib:/ac_lib/lib/wireless_tools/lib:/ac_lib/app/kenv/third/ffi:/ac_lib/app/kenv/python/lib:/ac_lib/lib/v4l-utils/lib:/ac_lib/lib/tslib/lib:/ac_lib/lib/qt/lib:/ac_lib/lib/openssl/lib:/ac_lib/lib/curl/lib:/ac_lib/lib/zlib/lib:/oem/usr/lib:/oem/lib:", "HOME": "/useremain/home/rinkhals", "QT_QPA_EVDEV_MOUSE_PARAMETERS": "/dev/input/event0", "OLDPWD": "/userdata/app/gk", "RINKHALS_HOME": "/useremain/home/rinkhals", "user_debug": "31", "QT_ROOT": "/ac_lib/lib/qt", "PAGER": "/bin/more ", "PS1": "\u@\h:\w# ", "QT_QPA_PLATFORM_PLUGIN_PATH": "/ac_lib/lib/qt/plugins/platforms", "APP_STATUS_STARTED": "started", "USE_MUTABLE_CONFIG": "1", "ORIGINAL_ROOT": "/tmp/rinkhals/original", "TERM": "vt102", "RINKHALS_LOGS": "/tmp/rinkhals", "QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS": "/dev/input/event0:rotate=180", "PATH": "/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/ac_lib/lib/third_bin:/ac_lib/lib/wireless_tools/bin:/ac_lib/lib/sysstat/bin:/ac_lib/lib/openssh/bin:/ac_lib/lib/openssh/sbin:/ac_lib/app/kenv/python/bin:/ac_lib/lib/v4l-utils/bin:/ac_lib/lib/openssl/bin:/ac_lib/lib/curl/bin:/ac_lib/lib/firmware/bin:/bin:/usr/bin:/usr/libexec/gcc/arm-buildroot-linux-uclibcgnueabihf/11.4.0:/bin:/sbin:/usr/bin:/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin:/oem:/oem/bin:/oem/usr/bin:/oem/sbin:/oem/usr/sbin", "QT_QPA_FB_HIDECURSOR": "1", "APP_STATUS_STOPPED": "stopped", "RINKHALS_VERSION": "20260606_02", "SHELL": "/bin/sh", "CXX": "/usr/bin/g++", "KOBRA_VERSION": "2.6.9.6", "storagemedia": "emmc", "KOBRA_DEVICE_ID": "740199538f954f501116290cbe43fd65", "KOBRA_MODEL_CODE": "KS1M", "QT_QPA_FONTDIR": "/ac_lib/lib/qt/fonts", "PWD": "/useremain/rinkhals/.current", "QT_QPA_PLATFORM": "linuxfb:fb=/dev/fb0:size=800x480:rotation=180:offset=0x0:nographicsmodeswitch", "RINKHALS_ROOT": "/useremain/rinkhals/20260606_02-2", "PYTHONPATH": "", "CC": "/usr/bin/gcc", "TZ": "UTC", "QT_PLUGIN_PATH": "/ac_lib/lib/qt/plugins", "EDITOR": "/bin/vi"}"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Shell "df -Ph /useremain/rinkhals/20260606_02-2 | tail -n 1 | awk '{print $3 " / " $2 " (" $5 ")"}'" => "698.5M / 5.7G (13%)"
INFO:root:Shell "cat /sys/class/backlight/backlight/brightness" => "255"
INFO:root:Exiting...
`

[ArtytheSecond2nd]

I am also having this issue. The partial solution ive found is to click first the rinkhals button, then the "export logs to u-disk" button, which loads a rinkhals menu showing manage apps, install & updates, and advanced settings. No idea why that works but it does.

Edit: Just saw another comment also found this solution, so it probably works on all printers with this issue.