Bug 1373426

Summary: Test case failure: KMS - classic - white screen blink
Product: Red Hat Enterprise Linux 7 Reporter: Tomas Hudziec <thudziec>
Component: xorg-x11-drv-nouveauAssignee: Ben Skeggs <bskeggs>
Status: CLOSED NEXTRELEASE QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.3CC: tpelka
Target Milestone: rc   
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Hardware: x86_64   
OS: Linux   
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Last Closed: 2017-06-20 16:29:51 UTC Type: Bug
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Description Tomas Hudziec 2016-09-06 09:14:43 UTC 
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.
Comment 1 Tomas Hudziec 2016-09-06 09:16:10 UTC 
Graphic card: NVIDIA Corporation GM206 [GeForce GTX 960] [10de:1401]
kernel-3.10.0-501.el7.x86_64
xorg-x11-server-Xorg-1.17.2-22.el7.x86_64
Comment 3 Tomas Hudziec 2016-09-06 12:03:17 UTC 
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.
Comment 4 Tomas Hudziec 2016-09-07 10:45:47 UTC 
Happened also after rebooting.
Comment 5 Tomas Hudziec 2016-09-07 11:11:39 UTC 
"Crashed" screen blink happened also before starting graphical portion of the anaconda installer.
Comment 7 Tomas Pelka 2017-06-20 16:29:51 UTC 
works for me with el7.4