Comment 0 for bug 1895905

I'll add detail later
likely package should be xserver-xorg-video-nouveau

I've had this issue before on eoan on hp dx6120 i believe but cannot find bug report (likely not filed as that box was i386 & support was being dropped when I noticed it; ie. pre-release)

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-18-generic 5.8.0-18.19
ProcVersionSignature: Ubuntu 5.8.0-18.19-generic 5.8.4
Uname: Linux 5.8.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: guiverc 1095 F.... pulseaudio
 /dev/snd/controlC0: guiverc 1095 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: LXQt
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted
Date: Thu Sep 17 11:13:50 2020
InstallationDate: Installed on 2021-09-17 (-365 days ago)
InstallationMedia: Lubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200916)
IwConfig:
 lo no wireless extensions.

 eno1 no wireless extensions.
Lsusb:
 Bus 002 Device 003: ID 046d:c534 Logitech, Inc. Unifying Receiver
 Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. OptiPlex 990
ProcFB: 0 nouveaudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-18-generic root=UUID=c29a66dc-4cfc-4dc1-9fe7-3c9d8a8ab4a1 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.8.0-18-generic N/A
 linux-backports-modules-5.8.0-18-generic N/A
 linux-firmware 1.190
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/05/2017
dmi.bios.release: 4.6
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A20
dmi.board.name: 06D7TR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA20:bd05/05/2017:br4.6:svnDellInc.:pnOptiPlex990:pvr01:rvnDellInc.:rn06D7TR:rvrA00:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 990
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.