[Bug 2078011] Re: nouveau keeps showing `disp: ctrl 00000080` and crippling the system

This bug is awaiting verification that the linux/5.4.0-206.226 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-focal-linux' to 'verification-done-focal-linux'. If
the problem still exists, change the tag 'verification-needed-focal-
linux' to 'verification-failed-focal-linux'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-focal-linux-v2 verification-needed-focal-linux

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https://bugs.launchpad.net/bugs/2078011

Title:
nouveau keeps showing `disp: ctrl 00000080` and crippling the system

Status in linux package in Ubuntu:
Invalid
Status in xserver-xorg-video-nouveau package in Ubuntu:
Invalid
Status in linux source package in Focal:
Fix Committed
Status in xserver-xorg-video-nouveau source package in Focal:
Invalid

Bug description:
During the kerenl SRU testing, I found that the DGX A100 station kept
showing error messages from nouveau in dmesg as follows. These
numerous kernel error messages crippled the system and made it
unresponsive.

[ 2265.721452] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721457] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721463] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721474] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721480] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721485] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721491] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721496] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721507] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721514] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721519] nouveau 0000:07:00.0: disp: ctrl 00000080
[ 2265.721525] nouveau 0000:07:00.0: disp: ctrl 00000080

When the system reaches the idle delay, I guess the system will try to turn off the monitor then something went wrong.
I can quickly reproduce this by setting idle-delay to 1 sec after the system boot into desktop.
`gsettings set org.gnome.desktop.session idle-delay 0`

The impacted system is https://ubuntu.com/certified/201711-25989

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-video-nouveau 1:1.0.16-1
ProcVersionSignature: Ubuntu 5.4.0-193.213-generic 5.4.278
Uname: Linux 5.4.0-193-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Aug 27 20:31:20 2024
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
InstallationDate: Installed on 2020-08-03 (1485 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: NVIDIA DGX Station
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-193-generic root=UUID=88df95a6-4fd9-475a-8b59-ad14df1ada5a ro
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/27/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0406
dmi.board.asset.tag: Default string
dmi.board.name: X99-E-10G WS
dmi.board.vendor: EMPTY
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: EMPTY
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0406:bd08/27/2018:svnNVIDIA:pnDGXStation:pvrSystemVersion:rvnEMPTY:rnX99-E-10GWS:rvrRev1.xx:cvnEMPTY:ct3:cvrDefaultstring:
dmi.product.family: DGX
dmi.product.name: DGX Station
dmi.product.sku: 920-22587-2510-000
dmi.product.version: System Version
dmi.sys.vendor: NVIDIA
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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