** 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)

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