Public bug reported:

Re: "glances" DISK I/O display under Ubuntu 18.04 LTS and Linux 5.0.0
HWE kernel

There is a bug in _pslinux.py present in both python-psutil and
python3-psutil packages that prevents "glances" from displaying disk i/o
activity:

lsb_release -d
Description:    Ubuntu 18.04.3 LTS

uname -a
Linux beluga 5.0.0-29-generic #31~18.04.1-Ubuntu SMP Thu Sep 12 18:29:21 UTC 
2019 x86_64 x86_64 x86_64 GNU/Linux

apt policy glances
glances:
  Installed: 2.11.1-3
  Candidate: 2.11.1-3
  Version table:
 *** 2.11.1-3 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://gb.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status

head -1 /usr/bin/glances
#!/usr/bin/python3

dpkg -S _pslinux.py
python3-psutil: /usr/lib/python3/dist-packages/psutil/_pslinux.py
python-psutil: /usr/lib/python2.7/dist-packages/psutil/_pslinux.py
root@beluga:~# diff /usr/lib/python3/dist-packages/psutil/_pslinux.py 
/usr/lib/python2.7/dist-packages/psutil/_pslinux.py

apt policy python3-psutil
python3-psutil:
  Installed: 5.4.2-1
  Candidate: 5.4.2-1
  Version table:
 *** 5.4.2-1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

Fix taken from:
https://github.com/mykmelez/gecko/commit/76ea9067f0a83c38f192fa10e70be7fc063473db

fdiff _pslinux.py
--- .old/_pslinux.py.201712071156       2017-12-07 11:56:04.000000000 +0000
+++ _pslinux.py 2019-10-02 16:33:05.900067400 +0100
@@ -1062,7 +1062,7 @@
             reads = int(fields[2])
             (reads_merged, rbytes, rtime, writes, writes_merged,
                 wbytes, wtime, _, busy_time, _) = map(int, fields[4:14])
-        elif fields_len == 14:
+        elif fields_len == 14 or fields_len == 18:
             # Linux 2.6+, line referring to a disk
             name = fields[2]
             (reads, reads_merged, rbytes, rtime, writes, writes_merged,

** Affects: python-psutil (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1846460

Title:
  _pslinux.py disk activity fields incorrect for kernel 5.0.0

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