Created attachment 213498 [details] example for distorted virtualbox main window Scenario: - running virtualbox on FreeBSD 12.1-RELEASE-p2 amd64 host - nvidia quadro 1000m graphics card - latest ports - virtualbox-ose has been updated to ports r531736 (switch to clang for compiling) Result: - The Virtualbox main window has severe graphics artifacts - it is not displayed correctly (see attachment - the right part of the window is entirely unrelated to the rest; there can also be scrolling artifacts) Scenario (continued): - Starting a client running Windows 10 or Linux Result (continued): - The Virtualbox client windows have severe graphics artifacts - they are not displayed correctly - Updates to the window contents by the respective clients are distorted/partial/misplaced
Created attachment 213499 [details] distortions when running a Windows XP client
Minimizing and re-displaying the windows removes the distortions... up to the next drawing. So maybe this is instead caused by something else (compositing)? I tried going back to virtualbox-ose-5.2.34_2, to no avail (exactly the same refresh issues). Any ideas are appreciated... -- Martin
Very interesting news: The graphics refresh problem happens if DISPLAY is set to <hostname>:0 (i.e., TCP socket connection). The graphics refresh problem does not happen if DISPLAY is set to :0 (i.e., local UNIX socket). So there seems to be an issue only when using a remote DISPLAY. The question is, which library handles this in VirtualBox? -- Martin
Created attachment 256640 [details] Screenshot of current behavior with transparent background Not having used virtualbox on this machine for a long time I thought I could probably close this with "overcome by events". So I started up a VM. The astonishing result is that now I get a console with white text on a perfectly transparent background (I can move the window around and the background keeps shining through properly; however, the preview does not change). Starting X in this VM (using scfb) keeps the transparency, and starting "oclock -jewel red -geometry 400x400" gives an oclock with white background, transparent hands, and a jewel which is sometimes red depending on the transparent background color. It's sort of pretty but not very usable... Screenshot attached. -- Martin
Some more info: - It is fine when running virtualbox on a local display. - Host os is stable/14 - Ports latest -- Martin
Does not occur anymore on stable/14 with virtualbox-ose-6.1.50