Comment 3 for bug 1588009

Here : https://bugs.freedesktop.org/show_bug.cgi?id=96312 some people said this is caused by a "slow compositor" . In my case, it seems to me, these log entries are probably caused by a Xorg process running with 100% cpu blocking the UI for ~ 1 minute. This happens after animations played (e.g. progressbars), window resizing, scrolling, when I have many GUI apps open. I am still investigating.

My system: nvidia driver, 2 old GPUs, 18.04 with gdm3+Xorg