I think there were two distinct regressions here. (A) No flicker at all. (B) Very brief/subtle flicker of white, only for some of the Home/End keypresses. (These are often only at the extreme end of the page where I'm scrolling to, particularly for the first few Home/End keypresses (feels subjectively like it goes away after I've cycled a few times) (C) More noticeable flickers (flash easier to see since it's typically full-viewport, and happens nearly every time, and I think lasts a bit longer) Here's the regression-range for when we switched from (A) "No Flicker" to (B) "Brief/Subtle Flicker" INFO: Last good revision: c25899d7b631470b983650ee254177381a62eaad (2020-10-02) INFO: First bad revision: 33139800aca52aac192973fe24c9b74df7c87e00 (2020-10-03) INFO: Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c25899d7b631470b983650ee254177381a62eaad&tochange=33139800aca52aac192973fe24c9b74df7c87e00 Suspected: "Bug 1648799 - Enable partial present for webrender on linux" Here's the regression range for when we switched From (B) "Brief/Subtle Flicker" to (C) "More noticeable flicker": INFO: Last good revision: c15abadbc3c7008549ecb562326483749698ce46 (2022-03-21) INFO: First bad revision: 3649f9875f3ded66f3f50b8ecfd21a0a7ea438f2 (2022-03-22) INFO: Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c15abadbc3c7008549ecb562326483749698ce46&tochange=3649f9875f3ded66f3f50b8ecfd21a0a7ea438f2 Suspected: not sure.
Bug 1980707 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I think there were two distinct regressions here. (A) No flicker at all. (B) Occasional brief/subtle flicker of white, only for some of the Home/End keypresses. (These are often only at the extreme end of the page where I'm scrolling to, particularly for the first few Home/End keypresses (feels subjectively like it goes away after I've cycled a few times) (C) More noticeable flickers (flash easier to see since it's typically full-viewport, and happens nearly every time, and I think lasts a bit longer) Here's the regression-range for when we switched from (A) "No Flicker" to (B) "Brief/Subtle Flicker" INFO: Last good revision: c25899d7b631470b983650ee254177381a62eaad (2020-10-02) INFO: First bad revision: 33139800aca52aac192973fe24c9b74df7c87e00 (2020-10-03) INFO: Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c25899d7b631470b983650ee254177381a62eaad&tochange=33139800aca52aac192973fe24c9b74df7c87e00 Suspected: "Bug 1648799 - Enable partial present for webrender on linux" Here's the regression range for when we switched From (B) "Occasional Brief/Subtle Flicker" to (C) "More noticeable flicker": INFO: Last good revision: c15abadbc3c7008549ecb562326483749698ce46 (2022-03-21) INFO: First bad revision: 3649f9875f3ded66f3f50b8ecfd21a0a7ea438f2 (2022-03-22) INFO: Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c15abadbc3c7008549ecb562326483749698ce46&tochange=3649f9875f3ded66f3f50b8ecfd21a0a7ea438f2 Suspected: not sure.