Serial debug messages while showing splash screen
Posted: Thu Oct 25, 2018 5:55 pm
I am using a CM3 module on the CM IO Board with Raspbian Stretch Lite where Plymouth is already installed by default.
The original 7" touch screen is connected via DSI as well as a serial console on GPIO14/15.
My original cmdline.txt looked like this:
dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=PARTUUID=cf1ae200-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
I can show splash screens by using Plymouth and modifying cmdline.txt accordingly
and also without Plymouth when I follow https://yingtongli.me/blog/2016/12/21/splash.html.
Showing a continuous splash screen seems only to be possible when I'm using the parameter "quiet" in cmdline.txt because this stops sending boot messages to tty1 which goes to the Touchscreen.
My problem is, that this also stops sending boot messages to the console output on serial0 where I still want to see them for debugging purposes when something goes wrong.
Has anybody already managed to get serial console boot messages together with continuously shown splash screens on a display or an idea how I can get this done?
The original 7" touch screen is connected via DSI as well as a serial console on GPIO14/15.
My original cmdline.txt looked like this:
dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=PARTUUID=cf1ae200-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
I can show splash screens by using Plymouth and modifying cmdline.txt accordingly
and also without Plymouth when I follow https://yingtongli.me/blog/2016/12/21/splash.html.
Showing a continuous splash screen seems only to be possible when I'm using the parameter "quiet" in cmdline.txt because this stops sending boot messages to tty1 which goes to the Touchscreen.
My problem is, that this also stops sending boot messages to the console output on serial0 where I still want to see them for debugging purposes when something goes wrong.
Has anybody already managed to get serial console boot messages together with continuously shown splash screens on a display or an idea how I can get this done?