I also consistently run into the issue running gnome on xorg in Fedora. Nvidia 
drivers 440.82. Although this is on Fedora, but posting here since it's been 
going on a while and no resolution or other useful threads I can find. Symptoms 
appear to be the same.
The issue is triggered by Remmina and can also be triggered by KRDC for me when 
run in Gnome on Xorg. KDE on Xorg does not appear to trigger the bug, not it is 
triggered on Wayland.

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https://bugs.launchpad.net/bugs/1863142

Title:
  [nvidia] Xorg crashed with SIGSEGV in xf86ScreenSetCursor(pCurs=NULL)

Status in nvidia-graphics-drivers package in Ubuntu:
  Incomplete
Status in nvidia-graphics-drivers-440 package in Ubuntu:
  Incomplete
Status in xorg-server package in Ubuntu:
  Incomplete

Bug description:
  https://errors.ubuntu.com/problem/ea7655e8bec62deae73df2b30259cb413e61bef9

  ---

  I observed the following on Eoan as well with nvidia drivers older
  than 440.

  1) a windows 10 VM running in a qemu-kvm VM: pc-q35-3.1 machine type,
  QXL + SPICE:

      <graphics type='spice' autoport='yes'>
        <listen type='address'/>
        <image compression='off'/>
      </graphics>
      <video>
        <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' 
primary='yes'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x0'/>
      </video>

  2) When a host is booted with `prime-select intel` observing guest
  video output works fine with both virt-viewer (over SPICE) and remmina
  (over RDP);

  3) With `prime-select nvidia` Xorg crashes as described in
  https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1862895

  ProblemType: Crash
  DistroRelease: Ubuntu 20.04
  Package: xserver-xorg-core 2:1.20.7-2ubuntu1
  ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8
  Uname: Linux 5.4.0-12-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset 
nvidia
  .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
  .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  440.59  Thu Jan 30 01:00:41 
UTC 2020
   GCC version:  gcc version 9.2.1 20200203 (Ubuntu 9.2.1-28ubuntu1)
  ApportVersion: 2.20.11-0ubuntu16
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Feb 13 20:16:07 2020
  DistUpgraded: 2020-02-09 15:34:46,903 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   fwts-efi-runtime-dkms, 20.01.00, 5.3.0-29-generic, x86_64: installed 
(WARNING! Diff between built and installed module!)
   fwts-efi-runtime-dkms, 20.01.00, 5.4.0-12-generic, x86_64: installed 
(WARNING! Diff between built and installed module!)
   nvidia, 440.59, 5.4.0-12-generic, x86_64: installed
  ExecutablePath: /usr/lib/xorg/Xorg
  ExecutableTimestamp: 1579009393
  GraphicsCard:
   Intel Corporation HD Graphics 630 [8086:591b] (rev 04) (prog-if 00 [VGA 
controller])
     Subsystem: Razer USA Ltd. HD Graphics 630 [1a58:6755]
   NVIDIA Corporation GP106M [GeForce GTX 1060 Mobile] [10de:1c20] (rev a1) 
(prog-if 00 [VGA controller])
     Subsystem: Razer USA Ltd. GP106M [GeForce GTX 1060 Mobile] [1a58:6755]
  InstallationDate: Installed on 2018-05-13 (641 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  MachineType: Razer Blade
  ProcCmdline: /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth 
/run/user/1000/gdm/Xauthority -background none -noreset -keeptty -verbose 3
  ProcCwd: /home/dima
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-12-generic 
root=UUID=8c1115d9-2cee-41a9-864f-d4e57d662706 ro rootflags=subvol=@ 
button.lid_init_state=open amdgpu.dpm=1 amdgpu.ppfeaturemask=0xffffffff
  Signal: 6
  SourcePackage: nvidia-graphics-drivers
  StacktraceTop:
   System ()
   ()
   ()
   ()
   <signal handler called> () at /lib/x86_64-linux-gnu/libpthread.so.0
  Title: Xorg crashed with SIGABRT in System()
  UpgradeStatus: Upgraded to focal on 2020-02-09 (4 days ago)
  UserGroups: adm cdrom dip libvirt lpadmin lxd microk8s plugdev sambashare sudo
  dmi.bios.date: 02/22/2018
  dmi.bios.vendor: Razer
  dmi.bios.version: 4.02
  dmi.board.name: Razer
  dmi.board.vendor: Razer
  dmi.chassis.type: 9
  dmi.chassis.vendor: Razer
  dmi.modalias: 
dmi:bvnRazer:bvr4.02:bd02/22/2018:svnRazer:pnBlade:pvr6.06:rvnRazer:rnRazer:rvr:cvnRazer:ct9:cvr:
  dmi.product.family: 1A586755
  dmi.product.name: Blade
  dmi.product.sku: RZ09-01953E72
  dmi.product.version: 6.06
  dmi.sys.vendor: Razer
  separator:

  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.100-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.3.3-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 19.3.3-1ubuntu1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu1
  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

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