Gnome Xwayland, Debian Testing, Intel

The "How toxic air gets inside a plane" section flickers and smears around.

Screencast: mozregression --launch 20201219093321 --pref gfx.webrender.all:true gfx.webrender.software:true -a https://www.latimes.com/projects/toxic-chemicals-planes-covid-19-travel-woes/

mozregression --good 2020-11-01 --bad 20201219093321 --pref gfx.webrender.all:true gfx.webrender.software:true -a https://www.latimes.com/projects/toxic-chemicals-planes-covid-19-travel-woes/

21:12.52 INFO: Last good revision: 58c3a2573804f12b8798c25605f7b7f01d720350
21:12.52 INFO: First bad revision: b7aedb850662ce676d7408acd4770cb2958143e1
21:12.52 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=58c3a2573804f12b8798c25605f7b7f01d720350&tochange=b7aedb850662ce676d7408acd4770cb2958143e1

b7aedb850662ce676d7408acd4770cb2958143e1 Matt Woodrow — Bug 1678493 - Use the clipped dest area when computing bands so that they're evenly spread across the pixels actually drawn. r=lsalzman
f8a0ebaa5e8ffd9e5e450f48bddb9ce6568a912a Matt Woodrow — Bug 1678493 - Pass the SwCompositor clip rect into the inner Composite code rather than intersecting if beforehand. r=lsalzman
9cec7f7add10d3aa0ce3fb61bc855a0721a85434 Matt Woodrow — Bug 1678493 - Don't support having both a native gl context and a native compositor in SwCompositor. r=lsalzman
94e770a1e9040144c40136388c2defc372ba7a88 Matt Woodrow — Bug 1678493 - Intersect the dirty rect with the compositor surface clip rect in SwCompositor. r=lsalzman

I suspect this is a duplicate of bug 1679215, but we can confirm once that fix lands.

Since darkspirit is currently unreachable I am going to just assume bug 1679215 resolved this. If it turns out that it did not we can reopen it.