![切换用户后黑屏](https://linux22.com/image/1049515/%E5%88%87%E6%8D%A2%E7%94%A8%E6%88%B7%E5%90%8E%E9%BB%91%E5%B1%8F.png)
以下是我在 Ubuntu 14.04 中发生的详细信息:
I log in as user "A"
Without terminating the session, I switch to user "B"
without terminating the session, i switch back to user "A" and there is a black screen in my monitor for a 3 seconds before start the session.
你能帮我一下吗?谢谢