[Bug 1858463] [NEW] Desktop freezing while SSD under heavy load

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Every time my SSD is under heavy writing load (e.g. copying large files
from a USB stick, or downloading an ISO from a fast website), the entire
Ubuntu (Gnome) desktop, including mouse pointer, freezes.

My computer is an Asus UX410UAK with a Micron 1100 SSD.
guillaume at massada:~$ sudo dmidecode | grep -i UX
	Version: UX410UAK.308
	Product Name: UX410UAK
	Family: UX
	Product Name: UX410UAK
guillaume at massada:~$ cat /proc/scsi/scsi
Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: Micron_1100_MTFD Rev: A020
  Type:   Direct-Access                    ANSI  SCSI revision: 05

This is a recurring problem, and has always been with this machine
(including previous kernel and Ubuntu versions, at least for the past 2
years).

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: ubuntu-desktop (not installed)
ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10
Uname: Linux 5.3.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Jan  6 18:20:01 2020
InstallationDate: Installed on 2018-07-28 (526 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-meta
UpgradeStatus: Upgraded to eoan on 2019-10-18 (80 days ago)

** Affects: ubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug eoan wayland-session
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Desktop freezing while SSD under heavy load
https://bugs.launchpad.net/bugs/1858463
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