I did a test with testing nvidia driver 495.46.run, it will have a lag issue when use 'on-demand' mode in 'external-only' mode. After enabled the proposed and did 'apt-dist upgrade', now I use latest xserver-xorg-core, this issue is fixed now.
xserver-xorg-core:amd64 (2:1.20.11-1ubuntu1~20.04.2, 2:1.20.13-1ubuntu1~20.04.1 xwayland:amd64 (2:1.20.11-1ubuntu1~20.04.2, 2:1.20.13-1ubuntu1~20.04.1)
kernel: 5.14.0.1008.8-oem
I did a test with testing nvidia driver 495.46.run, it will have a lag issue when use 'on-demand' mode in 'external-only' mode. After enabled the proposed and did 'apt-dist upgrade', now I use latest xserver-xorg-core, this issue is fixed now.
xserver- xorg-core: amd64 (2:1.20. 11-1ubuntu1~ 20.04.2, 2:1.20. 13-1ubuntu1~ 20.04.1 11-1ubuntu1~ 20.04.2, 2:1.20. 13-1ubuntu1~ 20.04.1)
xwayland:amd64 (2:1.20.
kernel: 5.14.0.1008.8-oem