Hi Hias,
thanks for your comment!
I activated debug-logging and reproduced the reboot again. The log is stored under: http://ix.io/498E
If this log shows not the information you need, please advise how to create the debug-log correctly.
As I wrote I tried already dtoverlay=cma, cma-512 without any result. Unfortunately I was also not able to check if the CMA was really increased. I tried the command cat /proc/meminfo but got no other values than without the dtoverly-command.
I do not really know how to use texturecache, but will follow this hint.
Anyway the reboot takes not place during the creation of the thumbnails, but when scrolling through the already created ones. In LE9.2.8 the scrolling hangs sometimes for a second but then proceeds, in LE10 a reboot takes place.
The reboots takes also place during other operations like using some Add-ons for ARD and ZDF-Mediathek (but it is not so reproducible like the scrolling through the music-library).
Currently I will stopping building-up a LE10-system on RPI 3B until this is fixed or a stable workaround has been found, because it will reboot within short time of usage and therefore it is not usable in "productive environment". This a pitty, because I really would like to upgrade because I would like to use some addons only working with LE10.
Best Regards
Joerg