Dell logo pops up for a while before gdm hand over to X session

[Kai-Chuan Hsieh]

[Summary]
Attach a monitor and output from Nvidia dGPU.
The Dell logo(BGRT image) pops up for a while before hand over to x session.

[Steps to reproduce]
* Prerequisite: Disable the auto-login
1. Power on the system
2. Enter the password
3. Check if the Dell logo pops
4. Suspend the system
5. Wake up the system and then enter the password
6. Check if the Dell logo pops up

[Expected result]
No Dell logo pops up in step 3 and step 6

[Actual result]
The Dell logo popped up in an instant and then disappeared

[Failure rate]
2/3

[Daniel van Vugt (vanvugt)]

Sounds like plymouthd is kicking in?

[Kai-Chuan Hsieh (kchsieh)]

Hello Daniel,

I remembered the small running circle before the login page is plymouth, but BRGT is plotted by fbcon driver, but I didn't remember it very clearly.

My question is if gdm can help to blank FB before hand over to x session?

Currently, I only see the issue on NV card but not i915 and amdgpu, but I wonder if we can do something to better support it from userspace.

Thanks,

[Daniel van Vugt (vanvugt)]

The first thing to check is whether it's plymouth displaying the logo. It is meant to do so at certain times, but usually fails on Nvidia due to bug 1868240. Try booting with the 'nosplash' kernel parameter as that should remove plymouth from the equation.