I can confirm this issue. I think the the problem causes the powerstates, which are not supported.
For more details:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/188739
I can confirm this issue. I think the the problem causes the powerstates, which are not supported.
For more details:
https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/188739