我的启动非常慢，我不知道为什么。
$ systemd-analyze
Startup finished in 10.975s (kernel) + 49.732s (userspace) = 1min 708ms
$ systemd-analyze blame
34.971s apt-daily.service
20.590s snapd.refresh.service
17.113s grub-common.service
16.033s apport.service
16.027s networking.service
15.894s ondemand.service
15.860s irqbalance.service
15.655s speech-dispatcher.service
11.695s ModemManager.service
9.772s accounts-daemon.service
8.626s NetworkManager-wait-online.service
8.058s systemd-logind.service
8.053s bluetooth.service
7.944s gpu-manager.service
7.896s alsa-restore.service
7.892s pppd-dns.service
7.882s rsyslog.service
7.860s avahi-daemon.service
7.844s dev-sda1.device
7.842s systemd-user-sessions.service
7.648s lightdm.service
7.610s teamviewerd.service
6.445s apparmor.service
此外，在启动过程中，我看到一条消息，内容如下：
device descriptor read/all, error -62
ata1 softreset failed (device not ready) #most of the times
error …