Display issues

Discussion in 'Mac OS X Guest OS Discussion' started by Era, Mar 15, 2020.

Tags:
  1. Era

    Era Bit Poster

    Messages:
    3
    Hello,
    I have some display issues with my macOS Catalina virtual machine.
    Exemple :
    Microsoft Team : white screen
    Safari : reverse tab color
    Maps : black screen
    VLC : flashing screen
    I tried to increase CPU, RAM, Graphics but still have the problem. Can someone help me ?
    3.png 2.png Capture d’écran 2020-03-15 à 17.46.36.png
     
  2. Maria@Parallels

    Maria@Parallels Parallels Team

    Messages:
    5,186
    Hi, did you try the Parallels Tools reinstallation?
     
    satishG likes this.
  3. Era

    Era Bit Poster

    Messages:
    3
    Yes, I also tried without tools and Mojave, same problem.
     
  4. Maria@Parallels

    Maria@Parallels Parallels Team

    Messages:
    5,186
    Could you collect the tech report please and post the report's ID here?
     
  5. BrianM19

    BrianM19

    Messages:
    1
    I have these same issues. It looks pervasive to me
     
  6. Maria@Parallels

    Maria@Parallels Parallels Team

    Messages:
    5,186
    Hi, did you perform any resolution steps? Parallels Tools reinstallation?
    Could you please collect the tech report once the issue reoccurs and post the report's ID here?
    Screenshot of the issue will be very appreciated.
     
  7. Era

    Era Bit Poster

    Messages:
    3
    Hello, the report's ID is 335441944
     
  8. NecoleF

    NecoleF Bit Poster

    Messages:
    5
    Thanks for sharing this wonderful information with me.
     
    satishG likes this.
  9. RogerH6

    RogerH6 Kilo Poster

    Messages:
    176
    Funnily, I'm seeing this same issue, with Windows VM's, since the latest May 2020 Windows update.
    You get the pull out for the start menu, solid black. Open a finder window it is solid white, except for the bit where the menus should be that is blue.
    As shown here when you go 'over' some bits the correct pull out appears. Maps give the same black screen described. I've found that it seems a lot 'better' (I won't say 'right', but it is very near to this), if I reduce significantly the size of the VM window.
    I looks as if something deep in the VM's graphic handling is going wrong with certain drawing operations when the screen size is fairly large, and that Catalina, Mojave, and now Windows 10, can all trigger this behaviour.
    You don't say what your core machine actually 'is', for me, it is worse on a new iMac Pro, than it is on an older iMac (though both will do it).
     
  10. RogerH6

    RogerH6 Kilo Poster

    Messages:
    176
    After a bit of fiddling around with Parallels support, have set the VM to 'scaled', and reduced the UI resolution in the Mac OS.
    This makes it then work.
    It looks as if the virtual screen driver 'hiccups' if trying to handle more than perhaps 10MB/screen (so perhaps 3 to 4M pixels).
    A fault with it, but reduce the working resolution and it at least becomes useable.
    Maybe you'd like to test and see if a similar reduction helps for your problem?.
     

Share This Page