$ systemd-analyze critical-chain

graphical.target @1min 30.008s
└─multi-user.target @1min 30.007s
  └─ModemManager.service @1min 24.958s +5.047s
    └─polkit.service @43.062s +428ms
      └─basic.target @21.203s
        └─sockets.target @21.202s
          └─snapd.socket @21.140s +5ms
            └─sysinit.target @20.719s
              └─systemd-backlight@backlight:intel_backlight.service @34.205s +660ms
                └─system-systemd\x2dbacklight.slice @34.164s
                  └─system.slice @5.307s
                    └─-.slice @5.307s