Comment 22 for bug 1814490

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Chris Guiver (guiverc) wrote : Re: lubuntu 19.04/19.10 xscreensaver runs on single display, other display continues normally

https://bugs.launchpad.net/ubuntu/+source/lubuntu-artwork/+bug/1855792

daily 20.04 qa-test on hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)

I suspect the issue in this bug relates to that bug (top-half of wallpaper appears on my bottom-monitor, my top-monitor being dark except for bottom pixel or two which is always the color matching the top of the wallpaper shown on screen below..)

I can fiddle with Monitor.Settings and make this screensaver work on both display, OR work on single display only using Keep.monitors.attached and position of displays - this applies to both bugs. However I don't get both bugs occurring at the same time, nor different times. I believe they are linked, but cannot work out the pattern (or not yet anyway).

The two bugs do NOT always occur, I often get one occurring and not the other.

-- following is from comment 3 of https://bugs.launchpad.net/ubuntu/+source/lubuntu-artwork/+bug/1855792

I suspect from play this issue relates to http://launchpad.net/bugs/1814490, and an issue I've been wanting to raise upstream for a few weeks (but am unsure how to word..). Keep.monitors.attached??

What was obvious though - there was a bright blue line bottom of my-top monitor, being the top of the wallpaper (1910-boat-on-beach.png) that I suspect relates to issue, it shouldn't be there I believe (ie. slight overlap) occurs when Keep.monitors.attached is checked.. that seems to cause 1814490 & this to be mostly predictable..