Hi, I just wanted to add that I am having very similar issues on a Surfcace Pro with Windows 10. In my case I have noticed that it is mostly AutoCAD generated PDFs that cause the issue (of size A1 or more)
When I zoom in too far on a Panasonic TV the PDF flashes in rotating rectangles. Roughly what I mean is that the PDF page is divided into quadrants and the content flashes in succession in each quadrant, leaving only the background visible. This behaviour only starts when zooming in (I haven’t discovered more detailed patterns yet), and as I zoom in more the frequency of the flashing increases. Interestingly, the size of the quadrants or sectors does not change as I zoom in, so if zoomed in enough the whole screen just flashes as the whole quadrant is filling the screen.
Ithink this has very much to do with some interaction between Sumatra, and Windows’ terrible handling of scaling and anti-aliasing. Playing around with the compatibility settings of Sumatra (under change high DPI settings) can worsen the problem, causing even A4 Word generated PDFs to flicker.
Another observation pointing to memory issues is that the problem seems worse when I have many tabs open. If I have only a single drawing open and the following setup the problem dissapears completely:
- The “Use this setting to fix scaling problems…” windows option under “change high DPI settings” unchecked.
- The high DPI scaling override setting checked and set to “System Enhanced”.
When opening Shlomi’s test file and zooming in I do not get any flasing but do get the “dancing text”, the frequency and pattern of the dancing text follows that of the flashing describe above. If I zoom in far enough the application crashes.