[nvidia] Monitor setups including portrait orinted monitors cause horizontal resolution to increase

[Martin]

With a multi-monitor setup that includes one portrait oriented screen, most of the time several of the monitors end up with extended horizontal resolution to the right, resulting in panning when you move the mouse, as well as overlap between the screen areas.

I can occasionally make it behave after some enabling, disabling and orientation changes of the monitors, but seemingly only if I have them all in a row and don't have the portrait one furthest to the right.

Attempted setup that breaks:
                             -----------
                            |1920x1080 |----
                            |nvidia egpu|1080|
 --------------- ----------- -----------|x |
|2560x1440 |1920x1080 |1920x1080 |1920|
|laptop internal|nvidia egpu|nvidia egpu|egpu|
| |----------- ----------- ----
 ---------------

Also attached screenshot that should illustrate the issue well.

I can't tell for sure if this is an xorg issue or a nvidia one, I did look at both arandr and nvidia-settings and in neither can I see anything amiss.

lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.09.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:09:00.0'
.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 9.3.0-10ubuntu2)
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 30 20:18:43 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus: nvidia, 440.64, 5.4.0-28-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo UHD Graphics 620 [17aa:225d]
 NVIDIA Corporation TU104 [GeForce RTX 2070 SUPER] [10de:1e84] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. TU104 [GeForce RTX 2070 SUPER] [1043:8727]
InstallationDate: Installed on 2020-04-30 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 20L5CTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-28-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/19/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N24ET56W (1.31 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20L5CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN24ET56W(1.31):bd02/19/2020:svnLENOVO:pn20L5CTO1WW:pvrThinkPadT480:rvnLENOVO:rn20L5CTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T480
dmi.product.name: 20L5CTO1WW
dmi.product.sku: LENOVO_MT_20L5_BU_Think_FM_ThinkPad T480
dmi.product.version: ThinkPad T480
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
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+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

I experienced the same weird unwanted screen panning with the Nvidia-440 driver today. But in my case only a single monitor is connected.

I suspect the new fractional scaling feature might be related. I was able to fix it by deleting ~/.config/monitors.xml though next time it happens I will be sure to analyse the file and see what's wrong it it.

[Sebastien Bacher (seb128)]

bug #1874567 is also about issue with screen rotation on nvidia drivers

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1874217, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.