Just after running sudo dpkg -i *.deb, and before rebooting, the error happened. Since the new kernel isn't running yet, I guess this current kernel still had the problem? That's strange because I've been running for more than 24 hours, downloading lots of torrents and had no problems.

I'm going to reboot now to test the new kernel

Here's the output:

sudo dpkg -i *.deb
[sudo] password for lz: 
Selecting previously unselected package linux-headers-4.14.0-17.
(Reading database ... 215114 files and directories currently installed.)
Preparing to unpack linux-headers-4.14.0-17_4.14.0-17.20~lp1746340_all.deb ...
Unpacking linux-headers-4.14.0-17 (4.14.0-17.20~lp1746340) ...
Selecting previously unselected package linux-headers-4.14.0-17-generic.
Preparing to unpack linux-headers-4.14.0-17-generic_4.14.0-17.20~lp1746340_amd64.deb ...
Unpacking linux-headers-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
Selecting previously unselected package linux-image-4.14.0-17-generic.
Preparing to unpack linux-image-4.14.0-17-generic_4.14.0-17.20~lp1746340_amd64.deb ...
Examining /etc/kernel/preinst.d/
Done.
Unpacking linux-image-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
Selecting previously unselected package linux-image-extra-4.14.0-17-generic.
Preparing to unpack linux-image-extra-4.14.0-17-generic_4.14.0-17.20~lp1746340_amd64.deb ...
Unpacking linux-image-extra-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
Setting up linux-headers-4.14.0-17 (4.14.0-17.20~lp1746340) ...
Setting up linux-headers-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
Setting up linux-image-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
update-initramfs: Generating /boot/initrd.img-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
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-4.15.0+
Found initrd image: /boot/initrd.img-4.15.0+
Found linux image: /boot/vmlinuz-4.14.0-17-generic
Found initrd image: /boot/initrd.img-4.14.0-17-generic
Found linux image: /boot/vmlinuz-4.13.0-32-generic
Found initrd image: /boot/initrd.img-4.13.0-32-generic
Found linux image: /boot/vmlinuz-4.13.0-21-generic
Found initrd image: /boot/initrd.img-4.13.0-21-generic
Adding boot menu entry for EFI firmware configuration
done
Setting up linux-image-extra-4.14.0-17-generic (4.14.0-17.20~lp1746340) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
update-initramfs: Generating /boot/initrd.img-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.14.0-17-generic /boot/vmlinuz-4.14.0-17-generic
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-4.15.0+
Found initrd image: /boot/initrd.img-4.15.0+
Found linux image: /boot/vmlinuz-4.14.0-17-generic
Found initrd image: /boot/initrd.img-4.14.0-17-generic
Found linux image: /boot/vmlinuz-4.13.0-32-generic
Found initrd image: /boot/initrd.img-4.13.0-32-generic
Found linux image: /boot/vmlinuz-4.13.0-21-generic
Found initrd image: /boot/initrd.img-4.13.0-21-generic
Adding boot menu entry for EFI firmware configuration
done