syslog filled with drm messages 40 times per second

[I&CO]

Hi all,

I don't really know when it exactly began.
From /var/log/syslog :
Jan 3 09:42:42 localhost kernel: [32659.271016] [drm:drm_mode_addfb2 [drm]] [FB:74]
Jan 3 09:42:42 localhost kernel: [32659.300800] [drm:drm_mode_addfb2 [drm]] [FB:89]

There are similar bugs that have been already noticed, but none of them helped me.

Changing desktop environment to a non-gnome desktop stops messages.

My environment (export cmd) :
declare -x XDG_CONFIG_DIRS="/etc/xdg/xdg-ubuntu:/etc/xdg"
declare -x XDG_CURRENT_DESKTOP="ubuntu:GNOME"
declare -x XDG_DATA_DIRS="/usr/share/ubuntu:/usr/local/share:/usr/share:/var/lib/snapd/desktop:/var/lib/snapd/desktop"
declare -x XDG_GREETER_DATA_DIR="/var/lib/lightdm-data/userprofile"
declare -x XDG_MENU_PREFIX="gnome-"
declare -x XDG_RUNTIME_DIR="/run/user/1000"
declare -x XDG_SEAT="seat0"
declare -x XDG_SEAT_PATH="/org/freedesktop/DisplayManager/Seat0"
declare -x XDG_SESSION_DESKTOP="ubuntu"
declare -x XDG_SESSION_ID="c2"
declare -x XDG_SESSION_PATH="/org/freedesktop/DisplayManager/Session0"
declare -x XDG_SESSION_TYPE="x11"
declare -x XDG_VTNR="7"

My kernel : 4.15.0-43-generic
Ubuntu 18.04.01 LTS
Graphic : Intel Haswell Mobile

Any help is appreciated
Thanks

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Thu Jan 3 09:38:35 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.2.18, 4.15.0-42-generic, x86_64: installed
 virtualbox, 5.2.18, 4.15.0-43-generic, x86_64: installed
 virtualbox, 5.2.18, 4.19.0-041900-generic, x86_64: installed
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:060a]
InstallationDate: Installed on 2016-12-20 (743 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: Dell Inc. XPS13 9333
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=19d7298f-74c8-4a78-9f17-88b9f04bbc3a ro net.ifnames=0 biosdevname=0 acpi=force plymouth:debug drm.debug=0xe
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/31/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0GFTRT
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd08/31/2015:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.family: Shark Bay System
dmi.product.name: XPS13 9333
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Timo Aaltonen (tjaalton)]

your boot options have 'drm.debug=0xe'

remove that from /etc/default/grub

[I&CO (info-infoetconseil)]

You're right Timeo. Without debug, no log.
Now we know how to mask logs, but not the source of the problem.
If it ever was a bot, the impact may be more important than just filling logs.