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My laptop has become slower in boot time since the upgrade to Bionic Beaver.

Most of the time (about 30 seconds) is lost here, according to dmesg:

[ 3.376986] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio2/input/input10
[ 3.804388] [drm] RC6 on
[35.544677] EXT4-fs (nvme0n1p1): mounted filesystem with ordered data mode. Opts: (null)
[35.625669] ip_tables: (C) 2000-2006 Netfilter Core Team

With a nvme SSD, newly installed, it booted in 20 seconds. How can I find out what process uses the lost time? What does the time in brackets say, the startup time or time finished?

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I solved the problem already with this: Boot hangs for 30 seconds at "Begin: Running /scripts/local-premount"

Boot time is back at 18.62 seconds

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