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Filed from caserun https://tcms.engineering.redhat.com/run/288293/#caserun_13122649
Version-Release number of selected component (if applicable):
xorg-x11-drv-nouveau-1.0.11-4.el7.x86_64
Steps to Reproduce:
1. Make sure that your graphics driver supports KMS.
2. Make sure you have rhgb quiet options in kernel commandline and no
nomodeset option - this is the default in Client and Workstation variants
3. Boot up
Actual results:
Between the time of circle based progress bar and logging screen there blinks white screen with colourful pixels for cca 0,25 second.
Expected results:
1. Make sure the whole booting process is correct and smooth, without any
graphic fragments nor unaligned text/logos. There should be circle progress
bar in the middle of the display instead of the text-based progress bar.
The bug does not occur at rebooting, only at powering on. It appears on both monitors, when 2 monitors are connected.
The white screen with colourful (mostly pink) pixels is probably some bitmap from the memory. Once, when I encountered some graphical crash due to hotplugging monitors, there was screen from crash (broken image of desktop and windows) instead of that white screen.