The task bar is really slow to show when my 4k tv is connected.
I think the desktop comes up in the same amount of time.
It is fast when the hdmi to the tv is unplugged.
I did systemd-analyze blame before and after and it seems to be alsa-restore.service
no_tv: 77ms alsa-restore.service
with_tv: 13.110s alsa-restore.service
with_tv (2nd run): 14.269s alsa-restore.service
The full systemd-analyze output is here: