[amdgpu] No display activity when coming out of powersave ("kernel BUG at mm/slub.c:296!")

[luca_ing]

Since a few weeks, my displays won't wake up from display powersave. The machine stays responsive via SSH.

This first occurred on Ubuntu 18.04, and keeps happening on 18.10 (which I had updated to in the hopes of fixing the issue that way).

The only escape I've found from this state is via magic SysRq.

It can be triggered reliably by waiting for the screensaver to kick in (e.g. overnight).

=============
Note a kernel bug warning in CurrentDmesg.txt
=============

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-20.21-generic 4.18.20
Uname: Linux 4.18.0-20-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu13.3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Tue Jun 4 13:40:47 2019
DistUpgraded: 2019-05-22 12:26:07,943 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: cosmic
DistroVariant: ubuntu
DkmsStatus:
 spl, 0.7.9, 4.18.0-20-generic, x86_64: installed (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!)
 zfs, 0.7.9, 4.18.0-20-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!) (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!) (WARNING! Diff between built and installed module!)
ExtraDebuggingInterest: Yes
GpuHangFrequency: Several times a week
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Since a couple weeks or more
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X] [1002:67df] (rev ef) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] Ellesmere [Radeon RX 470/480/570/570X/580/580X] [1462:341b]
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-20-generic root=ZFS=rpool/ROOT/ubuntu ro nouveau.modeset=0
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to cosmic on 2019-05-22 (13 days ago)
dmi.bios.date: 12/23/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1801
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A89GTD-PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1801:bd12/23/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A89GTD-PRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
make.log:
 DKMS make.log for zfs-0.7.9 for kernel 5.1.4-050104-generic (x86_64)
 Do 23. Mai 18:51:15 CEST 2019
 make: *** No targets specified and no makefile found. Stop.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.10.2
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.10.2
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

[Daniel van Vugt (vanvugt)]

It appears the 'amdgpu' kernel driver is crashing. That is part of the kernel package 'linux'.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.2-rc3/