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I followed all the instructions found in this guide verbatim. I used the same kernel source linux 3.16 etc. I got through all the steps, rebooted, and when using uname -r, it shows my other kernel version still (3.18.3) What can I do to make the kernel the 3.16 one that I just built?

Output of update-grub:

Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-3.18.3
Found initrd image: /boot/initrd.img-3.18.3
Found linux image: /boot/vmlinuz-3.16.0
Found initrd image: /boot/initrd.img-3.16.0
Found linux image: /boot/vmlinuz-3.13.0-32-generic
Found initrd image: /boot/initrd.img-3.13.0-32-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
connor moore
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2 Answers2

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When booting up, hold the Shift key, which brings you to the grub menu.

In grub go to Ubuntu Advanced Options and select the kernel you want.

Fabby
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war1oc
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  • I am new to ubuntu. How do I get into grub when booting up? – connor moore Feb 22 '15 at 05:45
  • when u start the computer u get to a grub os selector where u can select ubuntu or windows (and some other stuff such as memtest). u should get an option "advanced options for ubuntu" or something like that, select it and u should be able to select the kernel u want. but ubuntu will always select the latest kernel installed so if u want to keep using 3.16 and not 3.18 i would suggest removing 3.18 – war1oc Feb 22 '15 at 05:53
  • ahhh okay, This works and now I get to run my 3.16 kernel. thanks – connor moore Feb 22 '15 at 05:59
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Ubuntu loads into newest kernel by default, and 3.18 is the newest (at least , it's higher version). When you are at grub boot menu, get to Advanced Options for Ubuntu and check if you see the 3.16 kernel there. If you do, refer to this guide for selecting the default version to boot. Alternatively you could always find 3.18 packages with dpkg --get-selections | grep 3.18 and the remove the relevant entries with dpkg -r

Small note: in the link I posted, the default entry is specified as "Previous Linux versions>Ubuntu, with Linux 3.2.0-18-generic" . You may want to change that to "Advanced options for Ubuntu>Ubuntu, with Linux 3.2.0-18-generic"

Community
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Sergiy Kolodyazhnyy
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  • I followed the link you gave above, and I edited the GRUB_DEFAULT to be "Advanced options for Ubuntu>Ubuntu, with Linux 3.2.0-18-generic". rebooted and still booting with the 3.18.3 kernel – connor moore Feb 22 '15 at 05:44
  • 3.2.0 is the kernel number. It was just example. You need to put yours there , 3.16.** whatever the number is that you installed. Better just undo the changes, remove 3.18, and then you should boot to 3.16 – Sergiy Kolodyazhnyy Feb 22 '15 at 06:19