После обновления до новой убунты стал долго грузится комп. Гаснет Plymouth, на экране чернота, обращений к диску вроде нет. И так секунд на 20, затем появляется окошко для ввода логина и все работает нормально.
Файл /var/log/lightdm/lightdm.log:
[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.0.1, UID=0 PID=1136
[+0.00s] DEBUG: Loaded configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Registered seat module xlocal
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Adding default seat
[+0.00s] DEBUG: Starting seat
[+0.00s] DEBUG: Starting new display for greeter
[+0.00s] DEBUG: Starting local X display
[+0.01s] DEBUG: X server :0 will replace Plymouth
[+0.03s] DEBUG: Using VT 7
[+0.03s] DEBUG: Activating VT 7
[+0.03s] DEBUG: Logging to /var/log/lightdm/x-0.log
[+0.04s] DEBUG: Writing X server authority to /var/run/lightdm/root/:0
[+0.04s] DEBUG: Launching X Server
[+0.04s] DEBUG: Launching process 1223: /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none
[+0.04s] DEBUG: Waiting for ready signal from X server :0
[+0.04s] DEBUG: Acquired bus name
[+0.04s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+1.27s] DEBUG: Got signal 10 from process 1223
[+1.27s] DEBUG: Got signal from X server :0
[+1.27s] DEBUG: Stopping Plymouth, X server is ready
[+1.29s] DEBUG: Connecting to XServer :0
[+1.29s] DEBUG: Starting greeter session
[+25.53s] DEBUG: pam_start("lightdm-autologin", "lightdm") -> (0x141e100, 0)
[+25.53s] DEBUG: Starting session unity-greeter as user lightdm logging to /var/log/lightdm/x-0-greeter.log
[+25.53s] DEBUG: pam_authenticate(0x141e100, 0) -> 0 (Success)
[+25.53s] DEBUG: pam_acct_mgmt(0x141e100, 0) -> 0 (Success)
[+25.53s] DEBUG: Launching session
... // дальше, думаю, не важно
Видюха 8600gt, проприетарный драйвер из репозитория.
На другой, менее мощной машине, тоже подвергшейся обновлению интервал между Starting greeter session и pam_start(«lightdm-autologin», «lightdm») занимает около четверти секунды.