Panel applets crashing on start

[Stephen Boston]

SEveral panel applets on both top and right panels. Workspace switcher and text output applets raise error dialog on GUI session start. MATE.

This does not happen to all text output applets and not always the same ones. But the workspace switcher (set to 3x3 table) has become consistent in the last few days.

The journal has the following error

The program 'wnck-applet' received an X Window System error.
                                        This probably reflects a bug in the program.
                                        The error was 'RenderBadPicture (invalid Picture parameter)'.
                                          (Details: serial 4910 error_code 143 request_code 139 (RENDER) minor_code 7)
                                          (Note to programmers: normally, X errors are reported asynchronously;
                                           that is, you will receive the error a while after causing it.
                                           To debug your program, run it with the GDK_SYNCHRONIZE environment
                                           variable to change this behavior. You can then get a meaningful
                                           backtrace from your debugger if you break on the gdk_x_error() function.)

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.0.0-16.17-generic 5.0.8
Uname: Linux 5.0.0-16-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 8.3.0-6ubuntu1)
ApportVersion: 2.20.10-0ubuntu27
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: MATE
Date: Sun Jun 9 12:39:06 2019
DistUpgraded: Fresh install
DistroCodename: disco
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 418.56, 5.0.0-16-generic, x86_64: installed
 virtualbox, 6.0.6, 5.0.0-15-generic, x86_64: installed
 virtualbox, 6.0.6, 5.0.0-16-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. HD Graphics 530 [1043:1080]
   Subsystem: ASUSTeK Computer Inc. GM107M [GeForce GTX 960M] [1043:1080]
InstallationDate: Installed on 2019-04-25 (45 days ago)
InstallationMedia: Ubuntu-MATE 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: ASUSTeK COMPUTER INC. N501VW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-16-generic root=UUID=7a6ead44-b94a-4058-8c40-fda725ccedba ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/28/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N501VW.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N501VW
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN501VW.304:bd11/28/2016:svnASUSTeKCOMPUTERINC.:pnN501VW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN501VW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: N
dmi.product.name: N501VW
dmi.product.sku: ASUS-NotebookSKU
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.14.0+19.04.20190223.1-0ubuntu1
version.libdrm2: libdrm2 2.4.97-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-0ubuntu1
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

[Stephen Boston (stephenboston)]

Same error reported for The program 'mate-sensors-applet' received an X Window System error.

[Launchpad Janitor (janitor)]

[Expired for libwnck (Ubuntu) because there has been no activity for 60 days.]