I can't make gpu and suspend work at the same time on Acer A315 41G R6IM
with Ryzen 2500U and Radeon 535.

If I use pci=noacpi gpu works fine, but laptop hangs on suspend, if I
use ivrs_ioapic... suspend works fine but with no 2d gpu acceleration -
everything works sluggish, very high cpu on scroling or moving windows
etc., since, obviously, cpu does the work.

Tested kernel: 
ubuntu 18.04 with 4.15 kernel
ubuntu 18.04. with 4.18 hwe kernel and hwe stack
also tried 19.04 from daily builds with no success, obviously gpu patch still 
didn't make it to kernel in 19.04 daily builds.

Tested kernel params:
ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 clocksource=hpet iommu=on 
amd_iommu=on amdgpu.dc=1
amdgpu.runpm=0 radeon.modeset=0 amdgpu.dc=0
... other kernel arams mentioned in this thread

Any ideas on how to make Vega gpu run properly with ivrs_ioapic[4]=00:14.0 
ivrs_ioapic[5]=00:00.2 (basically I don't need radeon 535 at all since I don't 
play games, I only need 2d acceleration for X) ?

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-firmware in Ubuntu.

  Acer Aspire A315 IOAPIC failure on Ubuntu 18.04, kernel hangs, can't
  load, kernel freeze  (AMD Ryzen 5/Radeon/Raven) / AMDGPU Hybrid crash

Status in amd:
  Fix Released
Status in Linux:
Status in linux package in Ubuntu:
Status in linux-firmware package in Ubuntu:

Bug description:
  CPU: Ryzen 5 2500U
  VGA: Radeon 535
  Notebook: Acer Aspire A315

  This is a brand new notebook on the market with Ryzen 5/Radeon. 
  The default kernel of Ubuntu(18.04) hangs at loading with message:

  tsc: Refined TSC clocksource calibration: 1996.250 MHz
  clocksource: tsc: mask: 0xffffffffffffffff max_cycles: (...), max_idle_ns: 
  Soft lockup

  Using pci=noacpi kernel parameter kernel loads without any problem but
  my notebook produces more heat than on Win10. If I know right Acer
  notebooks need ACPI to the correct power management.

  The same thing happens on mainline 4.17,4.18rc1-2.
  BIOS upgrade to the latest version: 1.08 hasn't helped

  This problem has been reported upstream:

  The latest correctly working kernel was 4.13.* but the heat problem
  was present with this too.

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