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Screen scrambled on Clip Zip with RB 3.15

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sansalex:
Yes, I have the latest bootloader as well.
Tried to install bootloader from RockBox Utility with the original firmware both .18 and .21 but same behaviour.
I can confirm running apps doesn't resolve, it resolves only after screen off/on and doesn't occur again, until reboot.

Bilgus:
Ok, I have compiled a version for you that turns the screen off and back on at initialization lets see if that works

http://www.mediafire.com/file/1322rd061hixj4h/ClipZip_Corrupted_display_2-27-20_rockbox-full.zip

sansalex:
Thank you so much, this solved the issue! :D
However, booting takes a huge time: previously 2-3 seconds and now 37 seconds, why?  :o

Bilgus:
I'm guessing now it has to wait for the screen to become available so lets try a different method

I think the variable is_enabled is in an indeterminate state so lets try setting its value explicitly
http://www.mediafire.com/file/9a3mhc8r0ndwipw/ClipZip_Corrupted_displayV2_2-27-20_rockbox-full.zip

and if that version doesn't work I have another idea which is pretty much the same as the original that takes 37s to boot but does it later in the boot process
http://www.mediafire.com/file/96wqqqyrprdzc3v/ClipZip_Corrupted_displayV3_2-27-20_rockbox-full.zip

sansalex:
Here are the results (not so good, V1 was better):

V2: 41 seconds. The screen turns off after the boot splash and turns on when the system is ready. Turning it on manually while waiting, will result in a new automatic turn off.
V3: 43 seconds. Same behaviour.

Thanks for your time!

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