Hi, I have an imac retina 5k (the AMD Radeon R9 M295X 4096 MB) version. I get black bars as shown in the screenshot when scrolling through a spreadsheet. I tried all different video card memory settings, tried directx10 and 9, disabled vertical sync ... but I can't solve it. I'm at the latest version of PD10 and have the issue on both win 8.1 and win 10, office 2013 and 2016 preview, I also reinstalled my entire yosemite to be sure that a previous upgrade was not causing this problem... It's kinda driving me nuts Does anyone have any idea what could cause this an how I could solve this ? Or is this something that needs to be fixed by parallels ? Thanks for caring ! Benjamin
Hi Benjamin, Please try re-installing Parallels Tools and check how it works. Refer http://kb.parallels.com/4841
too bad, tried reinstall, same problem ... Do you have an imac retina 5k (the AMD Radeon R9 M295X 4096 MB) to try to simulate this problem ?
Hi Benjamin, Please submit a Problem Report ID http://kb.parallels.com/9058 and provide us the ID number here, so that we can assist you better.
Hello, I'm experiencing the exact same issues. Was there ever a resolution to this problem? If it's helpful at all, it only happens when the resolution is set at 5K AND with Excel set to full screen. Thanks for any help! Bruce
Hi, I understand that you would like to adjust scaling in Windows virtual machine, fonts are too small or too big or black lines in Windows. This issue occurred if some Windows applications are not adapted for HiDPi resolutions First of all let me say that all Windows applications are not designed for Retina displays as Microsoft does not support it at all. With Parallels Desktop it is possible but please consider that this is only our customization through virtual drivers. So the issue is not with Parallels Desktop, it is how Windows shows an application on the virtualized PC desktop. The most optimal settings to get proper views are: 1) Mac's system preferences -> Displays. In resolution you need to change it from "Best for Retina" to Scaled (one item left from Best of Retina 2) Parallels Virtual Machine Configuration ( http://kb.parallels.com/en/117287 ) -> Hardware -> Video -> More space or Un-tick Retina support. 3) Set scaling as 100% (default) in Guest OS: - Go to Start menu > Control Panel > Display - Set size of text and icons size as 100% (default) 2. Restart Windows virtual machine. After these setting it should look fine. For more information please refer this article http://kb.parallels.com/en/119926
Thanks Dishant, Totally understand that this is a Windows issue. Either way, thank you very much for your help. Following your steps solved the problem for me. Thanks again! Bruce
Hi BruceH1, Glad that the issue was resolved and thanks for letting us know that it helped! Feel free to reach out anytime for any queries.
Definitely Parallels don´t support the AMD Radeon video card, I´ve tried several times with different configuration and is not possible to see correctly Autocad files, seems like the only option is BootCamp
Thank you so much Dishant, I have been trying to work this problem out for months, much appreciated. John
