@James-T Hmm... thats quite interessting: I ve got the same two issues on my Nexus 4 for months (running OTA-12). Gonna download an painting-app - we will see...
Nexus 4 hardware does not support OTG. The OS is irrelevant.
For wireless keyboard/mouse you need to use Bluetooth devices. You also cannot use OTG and Slimport simultaneously, on micro-USB devices that support Slimport.
@guru ...and great! I wish I could use it as well as my daily phone. I do not like to repeat myself so please just read what I have written above. I've nowhere written that there is no possibility to use this OS on a daily phone isn't it? Only I stated above and gave my arguments to this it is not suitable for me as a main OS on daily phone. Wish You all the best!
@Fla The thread you just posted to is two years old so very out of date. In fact I will lock it shortly. Ubports do not support dual boot, though some have tried.
If your still interested I would perhaps start a new thread in Off Topic and see if it gets picked up. Thanks.