Vasco Freire created GUACAMOLE-498:

             Summary: Guacamole (RDP) on Chrome on HiDPI screen produces some 
                 Key: GUACAMOLE-498
             Project: Guacamole
          Issue Type: Bug
          Components: RDP
    Affects Versions: 0.9.14
         Environment: Windows 10 (1709/10.0.16299.192)
Google Chrome 64.0.3282.140
            Reporter: Vasco Freire
         Attachments: guacamole01.png, guacamole02.png

When using Guacamole to connect to a Windows RDP server, using Google Chrome, 
on a computer with a HiDPI screen (3200x1800, 200% scaling), some artifacts 
appear, as shown in accompanying screenshots.

Screenshots show an application (Notepad - but other apps show this problem) 
with either horizontal or vertical 1-pixel lines between areas where the screen 
is updated.

On the first screenshot, the mouse cursor was moved vertically, causing 
different menu entries to be selected, causing the horizontal lines. On the 
second screenshot, text was written, causing the vertical lines between the 
characters, as they appeared.

This problem does not occur on other browsers (Firefox, MS Edge) or other 
operating systems (Chrome on Linux).

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