After a screen lock, the desktop wallpaper turns to pixel garbage

[Adrian]

As mentioned, after a lock-wake cycle, the wallpaper turns to pixel garbage as seen on the screenshot.

Workaround: Setting the wallpaper from GNOME Tweaks, just not in the same adjustment mode as before. For example, if the adjustment was set to Zoom, now I must set it to something else to repair it. Setting it to Zoom again turns it once more into pixel garbage.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.0.0-7.8-generic 5.0.0
Uname: Linux 5.0.0-7-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 418.56 Fri Mar 15 12:59:26 CDT 2019
 GCC version: gcc version 8.3.0 (Ubuntu 8.3.0-3ubuntu1)
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 3 19:22:13 2019
DistUpgraded: 2019-03-29 19:19:33,105 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: disco
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 418.56, 4.18.0-16-generic, x86_64: installed
 nvidia, 418.56, 5.0.0-7-generic, x86_64: installed
DpkgLog:

ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Lenovo HD Graphics 530 [17aa:380a]
   Subsystem: Lenovo GM107M [GeForce GTX 950M] [17aa:380b]
InstallationDate: Installed on 2018-12-31 (93 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 8087:0a2a Intel Corp.
 Bus 001 Device 003: ID 5986:0670 Acer, Inc
 Bus 001 Device 002: ID 17ef:60b2 Lenovo
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 80RU
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-7-generic root=UUID=a2f33991-8e13-4dbe-bfae-4a0a1edd71b9 ro quiet splash vt.handoff=1
Renderer: Software
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to disco on 2019-03-29 (4 days ago)
XorgConf:
 Section "Extensions"
         Option "XVideo" "Disable"
 EndSection
dmi.bios.date: 02/15/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: E5CN58WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lenovo ideapad 700-15ISK
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 700-15ISK
dmi.modalias: dmi:bvnLENOVO:bvrE5CN58WW:bd02/15/2017:svnLENOVO:pn80RU:pvrLenovoideapad700-15ISK:rvnLENOVO:rnLenovoideapad700-15ISK:rvrNODPK:cvnLENOVO:ct10:cvrLenovoideapad700-15ISK:
dmi.product.family: IDEAPAD
dmi.product.name: 80RU
dmi.product.sku: LENOVO_MT_80RU_BU_idea_FM_Lenovo ideapad 700-15ISK
dmi.product.version: Lenovo ideapad 700-15ISK
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97-1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 19.0.1-1ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20180925-2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

This sounds like it's going to be the same Nvidia backgrounds bug as 1809407. So let's wait till that is resolved before treating this separately.