Dont know what I did, the task menu bar shrinked into one vertical bar with an arrow. Upon clicking it, it opens two more vertical transparant bars, but no menu. How to "log off" session safely? Thanks.

On my screen, I have Home and System, how can I use this to exit KDE safely? Last time I turn off the tablet without exit KDE, my SD card died. I am NOT sure they are related, but I hope history does NOT repeat itself.

bun