*** This bug is a duplicate of bug 1751075 ***

** This bug has been marked a duplicate of bug 1751075
   Xorg freeze when use mpv or cheese.

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  Xorg freeze when use mpv or cheese.

Status in xorg package in Ubuntu:

Bug description:
  I have my new laptop, Lenovo 720s-13ARR shipped with the latest Ryzen 5 
2500U, installed Ubuntu 17.10, it seems everything works except Wifi and GPU. 
After changing the wifi card with Intel 8265 and manually upgrading kernel with 
M-bab's build from 'https://github.com/M-Bab/linux-kernel-amdgpu-binaries'. 
Wifi and Gpu are working. But if I use mpv playing a video, when I try to 
resume the window from fullscreen, the screen freezes. Same thing happens when 
I use cheese, the camera app. Nothing I can do except a hard poweroff. After 
suffering that couple of times, I started to look for solutions from Internet. 
There are many error messages I can see if I use 'dmesg -l err' in the 
terminal. I cannot solve most of them, only use pci=noaer in the grub to 
suppress the "PCIe bus error", which keep increasing my "/var/log/kern.log" 
file size hundreds MB per hour before.
  One more thing, if I start a reboot, the laptop might have a random hang on 
ubuntu logo screen. To avoid this, I have to poweroff first, then press power 
button to implement a 'reboot'. No idea for me in which part problem should be 
responsible for these failures.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: xorg 1:7.7+19ubuntu3
  Uname: Linux 4.15.4+ x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CompositorRunning: None
  CurrentDesktop: ubuntu-communitheme:ubuntu:GNOME
  Date: Thu Feb 22 21:53:01 2018
  DistUpgraded: Fresh install
  DistroCodename: artful
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GpuHangFrequency: I don't know
   Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:15dd] (rev c4) (prog-if 
00 [VGA controller])
     Subsystem: Lenovo Device [17aa:380c]
  InstallationDate: Installed on 2018-01-30 (22 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  MachineType: LENOVO 81BR
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.4+ 
root=UUID=399cfaf6-9c73-4786-8ef5-bd331d20aadc ro pci=noaer 
ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.1 quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/19/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6KCN28WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0L77769 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad 720S-13ARR
  dmi.product.family: ideapad 720S-13ARR
  dmi.product.name: 81BR
  dmi.product.version: Lenovo ideapad 720S-13ARR
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.85-4~a~padoka0
  version.libgl1-mesa-dri: libgl1-mesa-dri 1:17.3.2-0~a~padoka0
  version.libgl1-mesa-glx: libgl1-mesa-glx 1:17.3.2-0~a~padoka0
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

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