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Thread: 20.04 boots up too slowly

  1. #1
    Join Date
    Apr 2019

    20.04 boots up too slowly

    Recently upgraded from 18.04 to 20.04. Boot up is (I think) unnecessarily slow. So I read some forums and started some investigating. In a nutshell I discovered networkwaitonline service was a bit slow so i disabled for the boot process and then I discovered that apparently, gdm3 was also a big factor in the boot up being slow. So i switched display manager from gdm3 to lightdm and I have to say, it is a little quicker.

    My issue with the boot up is this. After I put in my encryption password, the screen stays as is for approx 20-30 seconds ( apologies because i haven't actually timed it ), then the screen dims a little. Then it goes completely blank for approximately another 20 seconds before the lightdm login page appears, and still takes another 20 seconds or so before my desktop appears.

    How can I stop or minimize this which I believe is slowing the boot process up.

    I have added my systemd-analyze critical chain read out for you and also my grub read out in case it helps you. @53.831s
    └─ @53.831s
    └─networkd-dispatcher.service @29.217s +24.612s
    └─ @28.356s
    └─ @28.356s
    └─snapd.socket @28.351s +2ms
    └─ @28.085s
    └─snapd.apparmor.service @27.121s +963ms
    └─apparmor.service @25.341s +1.753s
    └─ @25.338s
    └─run-snapd-ns-canonical\x2dlivepatch.mnt.mount @51.809s
    └─run-snapd-ns.mount @44.151s
    └─ @23.654s
    └─dev-mapper-ubuntu\x2d\x2dvg\x2dswap_1.swap @22.128s +1.526s
    └─dev-mapper-ubuntu\x2d\x2dvg\x2dswap_1.device @22.116s

    Default grub readout

    # /boot/grub/grub.cfg.
    # For full documentation of the options in this file, see:
    # info -f grub -n 'Simple configuration'

    GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`"

    # Uncomment to enable BadRAM filtering, modify to suit your needs
    # This works with Linux (no patch required) and with any kernel that obtains
    # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
    #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xe fefefef"

    # Uncomment to disable graphical terminal (grub-pc only)

    # The resolution used on graphical terminal
    # note that you can use only modes which your graphic card supports via VBE
    # you can see them in real GRUB with the command `vbeinfo'

    # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux

    # Uncomment to disable generation of recovery mode menu entries

    # Uncomment to get a beep at grub start
    #GRUB_INIT_TUNE="480 440 1"

    Thanks in advance guys. I had a similar issue with 18.04 but somehow with 20.04, it seems more must be done to speed up the boot process....I'm just not sure what else i can do.

  2. #2
    Join Date
    Jun 2020

    Re: 20.04 boots up too slowly

    i faced the same problem and the solution was that the ISO file was incomplete maybe it is your problem too?

  3. #3
    Join Date
    Jan 2013

    Re: 20.04 boots up too slowly

    You can always backup your files and do a fresh install, another thing you can do is see what programs are starting up when your OS starts up.


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