Parallels 17 screen flickering, artifacts and red flash

Discussion in 'Windows Guest OS Discussion' started by fpmalard, Aug 11, 2021.

  1. fpmalard

    fpmalard Bit Poster

    Messages:
    33
    Hello,
    Just installed Parallels 17 with its default video settings and have also tried a bunch of OpenGL boot flags like "video.gl3=2" and "video.gl3=1".
    In all cases I can see red flashes and graphical distortions on some applications like AutoCAD.
    This wasn't happening with previous latest 16.x version.
    I was hoping the new version would come with lots of improvements and bug fixes with OpenGL but it seems it is quite the opposite.
    Disappointing.
     
  2. MikhailU@Parallels

    MikhailU@Parallels Parallels Team

    Messages:
    31
    Hello!
    Thank you for your feedback.

    1) Above all, please shut down Windows (Actions > Shut down), open its configuration https://kb.parallels.com/117287 > Hardware > Boot flags > Advanced... > remove all flags. Start the virtual machine and reproduce the issue. Once the issue is reproduced, please take a screenshot and collect a technical report (click Parallels icon || > Help > Send technical data > check "Attach screenshots..." > press Send Report) and send the report's 9-digit ID in a reply to this e-mail.
    2) Please provide us with a step-by-step scenario for local reproduction.

    Look forward to hearing from you!
     

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