Public bug reported:
When changing the GUI scaling factor on a multiple monitor setup the
monitors all just go blank and then revert to the previous values.
Changing the scaling factor manually in the config file does not work
either, it causes all monitors to go blank as well.
I observed that it is trying to set a mode "null", here is the line from the
Xorg log:
`NVIDIA(0): Setting mode "NULL"`
I have initially noticed this after upgrading from Ubuntu 19.10 to 20.04
and my screens would all be just blank after the system has booted up. I
had to delete the monitor configuration files manually via SSH to get a
screen output in xorg again.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
Uname: Linux 5.6.2-050602-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.2a.00.0: Error: [Errno 21] Ist ein Verzeichnis:
'/proc/driver/nvidia/gpus/0000:2a:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.64 Fri Feb 21 01:17:26
UTC 2020
GCC version: gcc version 9.3.0 (Ubuntu 9.3.0-8ubuntu1)
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 5 15:00:49 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
nvidia, 440.64, 5.3.0-45-generic, x86_64: installed
nvidia, 440.64, 5.4.0-21-generic, x86_64: installed
nvidia, 440.64, 5.6.2-050602-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
NVIDIA Corporation GP102 [TITAN Xp] [10de:1b02] (rev a1) (prog-if 00 [VGA
controller])
Subsystem: NVIDIA Corporation GP102 [TITAN Xp] [10de:123e]
InstallationDate: Installed on 2018-09-06 (576 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.6.2-050602-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/01/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.78
dmi.board.name: X570 Phantom Gaming-ITX/TB3
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.78:bd11/01/2019:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX570PhantomGaming-ITX/TB3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.2-1ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
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+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal possible-manual-nvidia-install
third-party-packages ubuntu
--
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1870922
Title:
GUI Scaling does not work with multiple monitors
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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1870922/+subscriptions
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