Ubuntu partition fills automatically

[winux]

Hi

When I first updated Ubuntu 16.04.4, about 3 weeks ago, I found out being rapidly short of disk memory on the partition, and then could not even make a screenshot.
I went to the French forum and after a long search we found out that "pcie_aspm" was responsible for that.

Actually it fills up very rapidly 2 logs (the 2 last ones on the following list)
*********************
 ubuntu@ubuntu:~$ sudo du -ma --max-depth=1 /mnt/5 | sort -n
0 /mnt/5/initrd.img
0 /mnt/5/initrd.img.old
0 /mnt/5/vmlinuz
0 /mnt/5/vmlinuz.old
1 /mnt/5/cdrom
1 /mnt/5/dev
1 /mnt/5/lib64
1 /mnt/5/lost+found
1 /mnt/5/media
1 /mnt/5/mnt
1 /mnt/5/opt
1 /mnt/5/proc
1 /mnt/5/root
1 /mnt/5/run
1 /mnt/5/snap
1 /mnt/5/srv
1 /mnt/5/sys
1 /mnt/5/tmp
4 /mnt/5/lib32
13 /mnt/5/bin
13 /mnt/5/sbin
14 /mnt/5/etc
211 /mnt/5/boot
237 /mnt/5/home
1035 /mnt/5/lib
4383 /mnt/5/usr
31289 /mnt/5/var
37196 /mnt/5
***********************
/mnt/5 is the mounting point of Ub partition (sda5) on the live key

Here is the forum address of the post (sorry it's in French but the terminal copies are self explaining)
https://forum.ubuntu-fr.org/viewtopic.php?id=2028634

Yesterday, after reseting the logs ...
*************************
ubuntu@ubuntu:~$ echo | sudo tee /mnt/5/var/log/kern.log
ubuntu@ubuntu:~$ echo | sudo tee /mnt/5/var/log/syslog
ubuntu@ubuntu:~$ sudo du -ma --max-depth=1 /mnt/5 | sort -n
0 /mnt/5/initrd.img
0 /mnt/5/initrd.img.old
0 /mnt/5/vmlinuz
0 /mnt/5/vmlinuz.old
1 /mnt/5/cdrom
1 /mnt/5/dev
1 /mnt/5/lib64
1 /mnt/5/lost+found
1 /mnt/5/media
1 /mnt/5/mnt
1 /mnt/5/opt
1 /mnt/5/proc
1 /mnt/5/root
1 /mnt/5/run
1 /mnt/5/snap
1 /mnt/5/srv
1 /mnt/5/sys
1 /mnt/5/tmp
4 /mnt/5/lib32
13 /mnt/5/bin
13 /mnt/5/sbin
14 /mnt/5/etc
211 /mnt/5/boot
237 /mnt/5/home
995 /mnt/5/var
1035 /mnt/5/lib
4383 /mnt/5/usr
6902 /mnt/5
***********************************

... I rebooted normally (no live key)
and after 5 mn I found out, from gparted, that my partition reached 37 Go, close to its max 39 Go
The only way to shutdown was a long press on the Power button, otherwise it was a continuing flow of error messages

A clever guy from the forum gave me the solution by adding "pcie_aspm" in the grub
I changed, on the following file, "sudo nautilus /etc/default/grub"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
into
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=off"

And it works !!! my partition never exceed 7 Go
I wanted to notify you about this important point which blocked my PC and, from the forum, I realized I was not the only one

Thanks for you action on future update