Comment # 8 on bug 1047225 from Zhao Qiang ������

(In reply to Stefan Dirsch from comment #5)
> Same issue after installing NVIDIA drivers (boo#1053811), although NVIDIA
> supports KMS meanwhile (/dev/dri/card0 being used by Xserver). So basically
> every customer using NVIDIA driver on a LVM/Encrypt setup is affected by
> that issue.

I'm busy with other issues recently, so it's been delayed these days, Sorry.
The point is that Nvidia's proprietary driver can not be supported,
Because this driver doesn't work with KMS very well and KMS is the
prerequisites of Plymouth.
Which means if you are using proprietary display driver, you must disable
Plymouth at same time.