The Japanese text on the bottom of the left image says: Sapporo (Draft) Black Label beer. I can't tell what the four characters under 生 are though. (Too blurry for me to figure out.)
Edit: those characters might be 非熱処理 -- meaning unpasteurized.
I don't know about KDE in particular, but I've had problems with USB mice waking various Ubuntu systems when they're not directly connected (i.e. there's a hub or KVM in between it and the computer). The workaround I used for that was to remove the mouse input (e.g. by carefully pressing a physical button on the KVM) -- which was good enough for me -- but I think there is a programmatic way to block particular classes of input from waking the system if some device is waking your system inappropriately.