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I upgraded to Ubuntu 15.04 from 14.10 two days back. The boot time has increased a lot since then. I installed the boot-up manager(bum) and deselected Bluetooth and scanner support options. The boot time is still the same. Its actually taking more than a minute. What should I do?

Rohith Acharya
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    Try bootchart on both 14.10 and 15.04 - it may help on why things are taking so long. Don't be surprised if this question is marked "off-topic" for not being reproducible. –  Apr 26 '15 at 05:30
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    If yo run 'dmsg > Desktop/file.txt' you'll get a file on your desktop with the timed info for the last boot. Then you can tell us which process was the culprit or which entry took longer. And we'll se what can be done. – eridani Apr 26 '15 at 06:00
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    You can also look for culprits running "systemd-analyze blame". Or if there's any long-duration gaps in the "dmesg" output, the log entries that follow might give clues. – David May 03 '15 at 04:06
  • See http://askubuntu.com/questions/615006/ for just one example of how using the diagnostic tools that come with systemd give far more information in a question. – JdeBP May 04 '15 at 09:00
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    did you ever fix this? for me, bootchart doesn't produce any output. But I did find useful information in the sudo journalctl output - for me it seems to have been an outdated cryptswap entry, which caused the boot to wait until timeout (90 seconds) – codeling Sep 10 '15 at 20:53
  • @codeling: bootchart should generate a bootchart.png which documents the boot-process – dufte Apr 13 '16 at 06:59
  • @codeling I really recommend to take a look at dmesg; for me it showed that the driver for my WLAN-stick took like 20 seconds (you can see the the time elapsed since the start of the boot process in microseconds...) – Nearoo Aug 10 '16 at 21:34

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