Many kids don't have problems in pre-k, then move on to Kinder and first where much more is expected of them behaviorally. I would talk to the teacher more in depth to find out what is going on. Bored or not, it's not acceptable behavior. There may be some aspects of Kinder that are boring to her (I clearly remember being in Kinder. I could read and no one else could, and I got very bored. But I never "checked out" nor acted out. I found books and READ!) because she already knows it, or perhaps because she doesn't want to do it. That's still not a reason to act out.
I partly agree with previous posters who have said the punishment needs to be between school and child. HOwever, I do think it's important that you talk to her about it and support the teacher. If you show your child that you don't support the teacher, either her discipline methods or what she does in the classroom, then that will transfer to your child. SHe won't feel "impressed" with what the teacher is doing if you don't. Remember that Kinder is about a lot more than just learning to read, write, and add. It's so much about socialization, so you may not get why the teacher is doing all that she is right now.
I also think writing lines is not appropriate punishment for a kindergartner. Not being able to watch her favorite shows for the night might be fine, but the lines are a bit much, I think. Just reinforce what the teacher is doing at school unless you feel that your child is not being treated fairly.
Good luck. If it continues, I would have a sit down talk with the teacher before the problems escalate.