** Description changed:

  suspend to ram crashes amdgpu.
  System is still accessible via SSH after resume from standby.
  Happens when X is running (gdm/gnome with 3d acceleration) and also when X is 
stopped.
  
+ Also the computer never really goes into standby. The cpu fan is running
+ all the time and the power button is fully lighted up. Nevertheless, I
+ need to press CTRL to "wake" it, so I can access it via SSH.
+ 
  I'll attach the dmesg output of several attempts.
  This is the hardware:
  
https://store.hp.com/GermanyStore/Merch/Product.aspx?id=9YN58EA&opt=ABD&sel=NTB
+ Tested EFI and BIOS bootmode.
  
  Please let me know if I can help tracking this down.
  I'm a software developer (sadly not a kernel developer), so you can ask dirty 
technical questions ;-)
  
  Workaround:
- Enable hibernation (suspend to disk) and use instead of suspend to ram.
+ Enable hibernation (suspend to disk) and use instead of suspend to ram 
(standby).
  
- What didn't helped:
- Kernel parameters (some actually prevented the system from booting): 
no_console_suspend nomodeset amdgpu.gpu_recovery=1 init_on_free=0 idle=nowait 
amd_iommu=flush
+ What didn't help:
+ Kernel parameters: no_console_suspend nomodeset amdgpu.gpu_recovery=1 
init_on_free=0 idle=nowait amd_iommu=flush
  echo mem > /sys/power/state
  systemctl start suspend.target
  echo 0 > /sys/power/pm_async
+ Upgrading kernel from 5.4 to: 5.6.0-1010-oem
+ 
+ Using the kernel parameters
+   no_console_suspend nomodeset amdgpu.gpu_recovery=1 init_on_free=0
+   idle=nowait amd_iommu=flush
+ and doing
+   echo mem > /sys/power/state
+ before suspend made the system acutally not crash.
+ Nevertheless, the cpu fan and the power button stay full on/lighted. So the 
system doesn't really go to standby either.
+ 
+ I'll try to find the minimal combination of kernel parameters.
+ nomodeset seems to be essential, but not sufficient.
+ Without nomodeset the system wakes again for a few seconds, but freezes a 
moment later (ssh still accessible).
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8
  Uname: Linux 5.6.0-1010-oem x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Sun May 31 18:43:54 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GpuHangFrequency: Continuously
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard:
-  Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c1) (prog-if 
00 [VGA controller])
-    Subsystem: Hewlett-Packard Company Picasso [103c:85de]
+  Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c1) (prog-if 
00 [VGA controller])
+    Subsystem: Hewlett-Packard Company Picasso [103c:85de]
  InstallationDate: Installed on 2020-05-29 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  MachineType: HP HP ENVY x360 Convertible 13-ar0xxx
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=de_DE.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=de_DE.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.6.0-1010-oem 
root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/26/2019
  dmi.bios.vendor: AMI
  dmi.bios.version: F.19
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 85DE
  dmi.board.vendor: HP
  dmi.board.version: 41.36
  dmi.chassis.type: 31
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAMI:bvrF.19:bd12/26/2019:svnHP:pnHPENVYx360Convertible13-ar0xxx:pvr:rvnHP:rn85DE:rvr41.36:cvnHP:ct31:cvrChassisVersion:
  dmi.product.family: 103C_5335KV HP Envy
  dmi.product.name: HP ENVY x360 Convertible 13-ar0xxx
  dmi.product.sku: 9YN58EA#ABD
  dmi.sys.vendor: HP
  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.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

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https://bugs.launchpad.net/bugs/1881494

Title:
  suspend to ram (standby) crashes amdgpu (Ryzen-7 Vega - HP Envy x360)

Status in xorg package in Ubuntu:
  New

Bug description:
  suspend to ram crashes amdgpu.
  System is still accessible via SSH after resume from standby.
  Happens when X is running (gdm/gnome with 3d acceleration) and also when X is 
stopped.

  Also the computer never really goes into standby. The cpu fan is
  running all the time and the power button is fully lighted up.
  Nevertheless, I need to press CTRL to "wake" it, so I can access it
  via SSH.

  I'll attach the dmesg output of several attempts.
  This is the hardware:
  
https://store.hp.com/GermanyStore/Merch/Product.aspx?id=9YN58EA&opt=ABD&sel=NTB
  Tested EFI and BIOS bootmode.

  Please let me know if I can help tracking this down.
  I'm a software developer (sadly not a kernel developer), so you can ask dirty 
technical questions ;-)

  Workaround:
  Enable hibernation (suspend to disk) and use instead of suspend to ram 
(standby).

  What didn't help:
  Kernel parameters: no_console_suspend nomodeset amdgpu.gpu_recovery=1 
init_on_free=0 idle=nowait amd_iommu=flush
  echo mem > /sys/power/state
  systemctl start suspend.target
  echo 0 > /sys/power/pm_async
  Upgrading kernel from 5.4 to: 5.6.0-1010-oem

  Using the kernel parameters
    no_console_suspend nomodeset amdgpu.gpu_recovery=1 init_on_free=0
    idle=nowait amd_iommu=flush
  and doing
    echo mem > /sys/power/state
  before suspend made the system acutally not crash.
  Nevertheless, the cpu fan and the power button stay full on/lighted. So the 
system doesn't really go to standby either.

  I'll try to find the minimal combination of kernel parameters.
  nomodeset seems to be essential, but not sufficient.
  Without nomodeset the system wakes again for a few seconds, but freezes a 
moment later (ssh still accessible).

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8
  Uname: Linux 5.6.0-1010-oem x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Sun May 31 18:43:54 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GpuHangFrequency: Continuously
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c1) (prog-if 
00 [VGA controller])
     Subsystem: Hewlett-Packard Company Picasso [103c:85de]
  InstallationDate: Installed on 2020-05-29 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  MachineType: HP HP ENVY x360 Convertible 13-ar0xxx
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.6.0-1010-oem 
root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/26/2019
  dmi.bios.vendor: AMI
  dmi.bios.version: F.19
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 85DE
  dmi.board.vendor: HP
  dmi.board.version: 41.36
  dmi.chassis.type: 31
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAMI:bvrF.19:bd12/26/2019:svnHP:pnHPENVYx360Convertible13-ar0xxx:pvr:rvnHP:rn85DE:rvr41.36:cvnHP:ct31:cvrChassisVersion:
  dmi.product.family: 103C_5335KV HP Envy
  dmi.product.name: HP ENVY x360 Convertible 13-ar0xxx
  dmi.product.sku: 9YN58EA#ABD
  dmi.sys.vendor: HP
  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.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

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