Ubuntu is booting very slowly after dual boot with Kali

Question

When I was using only Ubuntu 15.10, the boot time was very fast, it was about 15-20 seconds.

Recently I installed Kali-Linux rolling edition along side Ubuntu 15.10.
Afterwards the boot time of Ubuntu has drastically increased (Kali boots fast enough).
It takes almost 3 to 4 minutes -> "Ubuntu ....." loading.

My system partitions :

My BOOT-CHART :

*for higher resolution click here

I noticed that there is a gap of 72 Sec between line 971 to 972 in dmesg file.

I don't know why ?

Please help me to solve this problem.

I had the same issue just one month ago, then I found that installing kali with the same swap partition of Ubuntu, automatically changed partition UUID. Let's take a look at this link, hope it can help you! — MKay, Feb 21 '16 at 11:00
@MKay could you solve the problem? if yes please consider writing an answer. Thanks :-) — Severus Tux, Feb 21 '16 at 11:13
Could you post the output of journalctl command and of /etc/fstab file, please? — MKay, Feb 21 '16 at 11:16
@MKay output posted., please see the updated question now :-) — Severus Tux, Feb 21 '16 at 11:34
Please post also the OP for blkid /dev/sda4, I'm sorry I forgot. Anyway if you search for lines containing swap in journalctl command OP you can see errors in mounting partition. I think that you could try copying UUID of /dev/sda4 in /etc/fstab of Kali and substituting it in /etc/fstab of Ubuntu, this should solve the issue! — MKay, Feb 21 '16 at 11:53
Possible duplicate of Ubuntu boot slow after installing another linux distro — Severus Tux, Sep 15 '16 at 17:02

cl-netbox · Accepted Answer · 2016-02-21T11:51:02.507

3

Boot from Ubuntu installation media.

Select Try Ubuntu without installing.

Step 1 : Reinstall the Ubuntu GRUB boot loader.

Open a terminal and execute :

sudo mount /dev/sda2 /mnt
sudo mount /dev/sda1 /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sda
update-grub  
exit

Step 2 : Correct the UUID entries in the fstab file.

Open another terminal and execute :

sudo blkid

Open another terminal and execute :

sudo gedit /mnt/etc/fstab

Replace the UUID entries of sda1 | sda2 | sda3 | sda4

with those of the output given from the blkid command.

Close all terminals and reboot into Ubuntu operating system.

edited Feb 21 '16 at 11:51

answered Feb 21 '16 at 11:33

cl-netbox

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Thank you very much for your quick response with working answer :-) , This solved my problem. I can now boot Ubuntu fast. BUT!! My Kali-lost its speed :-( please see this *Invalid UUID error in kali* – Severus Tux Feb 21 '16 at 12:18
@SeverusTux : You're welcome ! ... and - the kali issue has to be fixed in kali ... enjoy ubuntu experience ! :) – cl-netbox Feb 21 '16 at 15:10

score 0 · Answer 2 · answered Aug 20 '18 at 17:24

Re-install grub and update entire fstab is more then necessary! if you wand the ubuntu splash-screen in grub instead kali splash-screen, yes you can reinstall grub.

kali(debian) installer, when installed belong another distro, do not take care about there have an existing swap partition so the installer format it again; once the swap partition has been formatted the UUID has change!

The only necessary is up to date the UUID of swap partition in the fstab and in "/etc/initramfs-tools/conf.d/resume" and regenerate the initramfs to let hibernation work again.

Ubuntu is booting very slowly after dual boot with Kali

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