I've just installed 16.04 and because of repetitive freezes, I searched and found that I may have to change my kernel version. Before that I think I was running on 4.8.0, at least that was what uname -r told me.
So I installed 4.7.0 just in case the other one was too new, but after a couple of checks I'm not sure whether my system really runs on 4.7.0 or it still runs on the older kernel. I followed the instructions at How To Update / Install Linux Kernel 4.7-RC3 On Ubuntu 16.04.
I did run sudo update-grub.
This the what I have in my /boot directory:
$ ls /boot
abi-4.4.0-72-generic lost+found
abi-4.7.0-040700rc3-generic memtest86+.bin
abi-4.8.0-36-generic memtest86+.elf
abi-4.8.0-46-generic memtest86+_multiboot.bin
config-4.4.0-72-generic System.map-4.4.0-72-generic
config-4.7.0-040700rc3-generic System.map-4.7.0-040700rc3-generic
config-4.8.0-36-generic System.map-4.8.0-36-generic
config-4.8.0-46-generic System.map-4.8.0-46-generic
efi vmlinuz-4.4.0-72-generic
grub vmlinuz-4.7.0-040700rc3-generic
initrd.img-4.4.0-72-generic vmlinuz-4.8.0-36-generic
initrd.img-4.7.0-040700rc3-generic vmlinuz-4.8.0-46-generic
initrd.img-4.8.0-36-generic vmlinuz-4.8.0-46-generic.efi.signed
initrd.img-4.8.0-46-generic
uname -r returns the same thing as before: 4.8.0-46-generic
And this is my cat /proc/version:
Linux version 4.8.0-46-generic (buildd@lcy01-15) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #49~16.04.1-Ubuntu SMP Fri Mar 31 14:51:03 UTC 2017
So my guess is that I did install them but I have to somehow remove the old files. However, I did not want to dive into deleting stuff before asking.
Also, as a side note, do you think it's a good idea at all for me to downgrade my kernel? It's just that I've tried everything and my machine keeps freezing.
You're going down the entirely wrong path.
If you're running 16.04.2 you were already running on kernel 4.8. You downgraded to kernel 4.7rc3! (rc3 means release candidate 3... if you're going to another kernel, at least pick a final release). It's still booting the 4.8 kernel because you haven't either chosen the 4.7 kernel boot in GRUB, or removed the 4.8 kernel and updated GRUB. Better to purge the 4.7 kernel that you installed.
Also, you need to do a fsck on your system disk, 'cause it looks like you've got some disk corruption... or a failing hard disk drive... probably the REAL reason why you're freezing.
To check the file system on your Ubuntu partition...
sudo fsck -f /rebootAlso, you should use the Disks application to check the SMART data in your hard disk, looking for failure data. You can also run the SMART tests there.
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