package xserver-xorg-legacy 2:1.20.9-2ubuntu1.2~20.04.1 failed to install/upgrade: installed xserver-xorg-legacy package post-installation script subprocess was killed by signal (Broken pipe)

[shintaro nagama]

I had dpkg error.
When I was fixing, ubuntu suggest reporting bug.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-legacy 2:1.20.9-2ubuntu1.2~20.04.1
ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-44-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: [Errno 21] ディレクトリです: '/proc/driver/nvidia/capabilities/gpu0'
.proc.driver.nvidia.capabilities.mig: Error: [Errno 21] ディレクトリです: '/proc/driver/nvidia/capabilities/mig'
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] ディレクトリです: '/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 450.102.04 Tue Dec 29 06:51:23 UTC 2020
 GCC version:
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CompositorRunning: None
Date: Fri Feb 26 17:31:33 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 450.102.04, 5.4.0-42-generic, x86_64: installed
 nvidia, 450.102.04, 5.8.0-44-generic, x86_64: installed (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!)
DuplicateSignature:
 package:xserver-xorg-legacy:2:1.20.9-2ubuntu1.2~20.04.1
 Setting up xserver-xorg-legacy (2:1.20.9-2ubuntu1.2~20.04.1) ...
 dpkg: error processing package xserver-xorg-legacy (--configure):
  installed xserver-xorg-legacy package post-installation script subprocess was killed by signal (Broken pipe)
ErrorMessage: installed xserver-xorg-legacy package post-installation script subprocess was killed by signal (Broken pipe)
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation UHD Graphics 630 (Desktop 9 Series) [8086:3e98] (prog-if 00 [VGA controller])
   Subsystem: ASRock Incorporation UHD Graphics 630 (Desktop 9 Series) [1849:3e98]
 NVIDIA Corporation TU106 [GeForce RTX 2070] [10de:1f02] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd TU106 [GeForce RTX 2070] [1458:37c2]
InstallationDate: Installed on 2021-02-26 (0 days ago)
InstallationMedia: Ubuntu 20.04.1 "Focal Fossa" - Release amd64(20200808.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-44-generic root=UUID=156b5dd8-ccc1-40b3-afbf-25933c60e7f7 ro recovery nomodeset dis_ucode_ldr nomodeset
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.4
SourcePackage: xorg-server
Title: package xserver-xorg-legacy 2:1.20.9-2ubuntu1.2~20.04.1 failed to install/upgrade: installed xserver-xorg-legacy package post-installation script subprocess was killed by signal (Broken pipe)
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/16/2018
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.30
dmi.board.name: Z390 Pro4
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.:bvrP1.30:bd08/16/2018:br5.13:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ390Pro4: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 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
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 2:1.20.9-2ubuntu1.2~20.04.1
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