Secondary display in portrait mode renders incorrectly

[Jeff Lyon]

Using the Ubuntu 20.04 settings app to setup multiple monitors creates broken xrandr settings. Using the app to set a 3840x2160 primary monitor in Landscape and 1920x1080 in Right Portrait, the primary monitor ends up with a "virtual resolution" of 4680x2160 which creates a horizontal panning effect at the monitor boundary and pushes the secondary monitor's content far off to the side.

Running xrandr shows the following (truncated for readability - screenshot attached)

Screen 0: minimum 8 x 8, current 5760 x 2160, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected 1080x1920+3840+0 left (normal left inverted right x axis y axis) 527mm x 296mm panning 1920x1920+3840+0 tracking 5760x2160+0+0 border 0/0/0/0
   1920x1080 60.00 + 60.00* 59.94 50.00 23.98
   ...
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 697mm x 392mm panning 4680x2160+0+0 tracking 5760x2160+0+0 border 0/0/0/0

The correct result for DP-4 would be 3840x2160. I will set this manually but wanted to report the problem.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.42.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:42:00.0'
.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: Fri Apr 24 22:53:21 2020
DistUpgraded: 2020-04-24 21:48:22,001 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus: nvidia, 440.64, 5.4.0-26-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. GP102 [GeForce GTX 1080 Ti] [3842:6696]
InstallationDate: Installed on 2019-07-30 (270 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: Micro-Star International Co., Ltd. MS-7B09
ProcEnviron:
 LC_COLLATE=C
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-26-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-25 (0 days ago)
dmi.bios.date: 11/14/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.C0
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X399 GAMING PRO CARBON AC (MS-7B09)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.C0:bd11/14/2018:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B09:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnX399GAMINGPROCARBONAC(MS-7B09):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7B09
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
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 20.0.4-2ubuntu1
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 N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[Sebastien Bacher (seb128)]

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 1874567, 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.