Originally Posted by shelgame
This is the albinoman887 CM11 unofficial from Jan15th. He's using launcher3. It apparently does support landscape, as it will go to landscape mode when in the HTC Dock.
I did find an app that will force it to landscape mode when charging. Which, since this is for a car, will work fine. I was really hoping to make it rotation-based - like a mini tablet. My Nexus 7 with CM11 supports landscape mode based only on rotation, so I don't see why a phone couldn't. Though it clearly isn't built into the phone as standard...
I'm running the CM11 from March 13 and having no problem at all with landscape/portrait. I am using a different launcher (Solo) that I like a lot better. You might want to give it a try, since it is free on Play Store.
AT&T Samsung Galaxy S5, rooted, Dynamic Kat
AT&T HTC Vivid - S-Off, rooted, unlocked, KitKat 4.4
LG Optimus V - ICS, now retired as an alarm clock