There are a couple of things that can cause this. The size of the screen can be adjusted via the properties or settings of the Remote Desktop Connection Manager. The black bars or black squares can be caused by video driver issues. Another reason that might be causing these black boxes is the connection speed. Switching to appropriate connection settings from the Remote Desktop Connection Manager and changing a few more settings rectify that situation as well.
Tips
Method 1: Adjust Screen Size via Remote Desktop Settings
You can change the settings of Remote Desktop Connection Manager that will let the screen adjust according to the client’s screen. There is an option named Same as client area which will automatically adjust the screen. This option will solve the screen size issue. The steps for changing this option are given below
The problem should be solved now Note: If it doesn’t solve the issue then right click the connection/file (from left pane) and select Properties. Select the tab Remote Desktop Settings and make sure the option Inherit from Parent is checked. If it isn’t, check the option and click Ok. This should solve the issue.
Method 2: Adjust Screen Size via Properties (Alternative method)
If method 2 didn’t solve the issue then you can try changing the DPI settings options from the properties. Here are the steps for changing these settings
That’s it. This should fix the issue. Try running the Remote Desktop Connection Manager again and the problem should be resolved.
Method 3: Adjust Screen Size via Scaling Options (Second Alternative)
If the first 2 methods didn’t work then there is another option that can be changed from the settings. These options are related to scaling up the desktop to fit the window. So, try to turn these options on and see if this resolves the issue. Here are the steps for changing these options.
This should solve the issue of screen size. Once done, restart the Remote Desktop Connection Manager and you should be good to go. Note: If it doesn’t solve the issue then right click the connection/file (from left pane) and select Properties. Select the tab Display Settings and make sure the option Inherit from Parent is checked. If it isn’t, check the option and click Ok. This should solve the issue.
Method 4: Set Connection Speed
This solution is for the black bars or black boxes appearing on the screen. Changing the connection speed has solved the issue for many users. Here are the steps for changing the connection speed
This should solve the issue of black boxes appearing on the screen. If it doesn’t then restart the Remote Desktop Connection Manager and try again
Method 5: Turn off Bitmap Caching
Bitmap Caching is an option available in the Remote Desktop Connection Client. This option basically lets the user store the images locally so the client doesn’t have to send the images or data over and over again. This option is although useful but might cause the black box/black bar issues. Turning this option off has solved the issue for plenty of people.
That should do the job. Now the next time you reconnect, the black boxes will not appear.
Method 6: Update Video Drivers
If the problem still persists after following the above given methods then it is time to check the video drivers. This solution is for the black bars appearing on the screen. Although it isn’t common that the problem is caused by the driver issue, but it isn’t impossible. We already have a guide on how to update/fix the video drivers. The guide have a step-by-step instructions that will help you fix the video drivers. Click here and follow the steps given in method 1 and method 2.
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