WPF - blank screen when GPU acceleration disabled

[EMJagadeesh]

Hi,

I've found a possible inconsistency in cef sharp 86.0.241 in our application. when DisableGpuAcceleration in CefSettings and launch the application, it open with blank html UI when I minimize it and restore it, html UI will load in the application.

• What version of the product are you using?
  86.0.241

• What architecture x86 or x64?
  x64

• On what operating system?
  Win10 Enterprise

• Are you using WinForms, WPF or OffScreen?
  WPF

• What steps will reproduce the problem?

  • When DisableGpuAcceleration in CefSettings and i launch the cefsharp application, html UI is loaded with blank white page while minimize and restore the app UI will load. I am not able to perform any UI action until when i minimize and restore the app. It create a major problem in our application

• What is the expected output? What do you see instead?
  Expected Output:
  When DisableGpuAcceleration in CefSettings and launch the application, html page load properly without any blank page

  Actual Output:
  When DisableGpuAcceleration in CefSettings and launch the application, html page load properly with blank page

• Please provide any additional information below.

  Please find the faced blank page while launching the application

  

• Does this problem also occur in the CEF Sample Application from http://opensource.spotify.com/cefbuilds/index.html?
  Yes

Thanks,
Jagadeesh

[amaitland]

If you can reproduce the problem with cefclient then you'll need to report the bug on https://bitbucket.org/chromiumembedded/cef/overview

As per https://github.com/cefsharp/CefSharp/blob/master/.github/ISSUE_TEMPLATE/bug_report.md

Any problem that reproduces with cefclient needs to be fixed in CEF.

Is there a reason you need to disable GPU acceleration?

[stevesw]

Could this be related to the Intel Xe graphics issue described in #3300 and #3280? We are getting users reporting similar issues in our app and the common thread between them all seems to be having new computers with this Intel Xe graphics card.

[amaitland]

Could this be related to the Intel Xe graphics issue

The Intel Xe Graphics issue sounds a little different in that it works when GPU Acceleration is disabled.

@EMJagadeesh What Graphics card are you experiencing this issue with?

As this problem is likely Hardware specific and unlikely we can do anything directly as it stands this will be closed as upstream.

At this point my only suggestion would be to also disable GPU Compositing as well.

settings.CefCommandLineArgs.Add("disable-gpu");
settings.CefCommandLineArgs.Add("disable-gpu-compositing");

[EMJagadeesh]

@amaitland - Issue resolve after disable GPU

[amaitland]

@EMJagadeesh Thanks for confirming.