moving cursor to dock causes desktop-icons graphic garbage

[Stephen Lawrence]

More generally, desktop mis-displays

3 Variations:

a)
0) open a window/app
1) minimise a window/application, causing Desktop to be visible
2) move cursor to dock (to open new app)

As soon as cursor hits dock, the graphic of the minimised window (graphic that would be shown by activating "Activities") appears. It can be cleared by sweeping a window over the desktop. It only happens once, once for every time you minimise a window.

b) Click "Acivities" - then click again to restore view
As soon as cursor hits dock, desktop goes corrupt (large parts blank out)

c) Close window
As b)

By attempting to move an icon on the Desktop, or pressing PrntScrn key, the Desktop repairs itself.

Ubuntu 20.04.1 LTS
Gnome 3.36.3
64-bit

nautilus:
  Installed: 1:3.36.3-0ubuntu1
  Candidate: 1:3.36.3-0ubuntu1
  Version table:
 *** 1:3.36.3-0ubuntu1 500
        500 http://gb.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.36.1.1-1ubuntu2 500
        500 http://gb.archive.ubuntu.com/ubuntu focal/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nautilus 1:3.36.3-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73
Uname: Linux 5.4.0-56-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Dec 6 12:11:40 2020
InstallationDate: Installed on 2016-09-01 (1556 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to focal on 2020-12-05 (1 days ago)
usr_lib_nautilus: dropbox 2018.11.08

[Stephen Lawrence (web-stephen)]

Sorry, not sure whether this is nautilus or desktop :-\

[Sebastien Bacher (seb128)]

Thank you for your bug report, could to a screenshot or video showing the issue it's a bit difficult to understand as described. Please also include the 'journalctl -b 0' log after triggering the issue. Nautilus doesn't handle the desktop anymore so reassigning to gnome-shell which is a better start point for rendering issues

[Stephen Lawrence (web-stephen)]

Video of screen leading to bug - attached

Journalctl Log:
-- Logs begin at Tue 2019-06-04 14:30:15 BST, end at Mon 2020-12-14 13:17:01 GMT. --
Dec 14 12:12:46 stephen-Inspiron-545 kernel: microcode: microcode updated early to revision 0xa0b, date = 2>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: Linux version 5.4.0-58-generic (buildd@lcy01-amd64-004) (gcc v>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-58-generic root=U>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: KERNEL supported cpus:
Dec 14 12:12:46 stephen-Inspiron-545 kernel: Intel GenuineIntel
Dec 14 12:12:46 stephen-Inspiron-545 kernel: AMD AuthenticAMD
Dec 14 12:12:46 stephen-Inspiron-545 kernel: Hygon HygonGenuine
Dec 14 12:12:46 stephen-Inspiron-545 kernel: Centaur CentaurHauls
Dec 14 12:12:46 stephen-Inspiron-545 kernel: zhaoxin Shanghai
Dec 14 12:12:46 stephen-Inspiron-545 kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point r>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Dec 14 12:12:46 stephen-Inspiron-545 kernel: x86/fpu: Enabled xstate features 0x3, context size is 576 byte>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-provided physical RAM map:
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009e7ff] usable
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x000000000009e800-0x000000000009ffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000cf58ffff] usable
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000cf590000-0x00000000cf5dffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000cf5e0000-0x00000000cf5e2fff] ACPI NVS
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000cf5e3000-0x00000000cf5effff] ACPI da>
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000cf5f0000-0x00000000cf5fffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x00000000fec00000-0x00000000ffffffff] reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: BIOS-e820: [mem 0x0000000100000000-0x000000016fffffff] usable
Dec 14 12:12:46 stephen-Inspiron-545 kernel: NX (Execute Disable) protection: active
Dec 14 12:12:46 stephen-Inspiron-545 kernel: SMBIOS 2.5 present.
Dec 14 12:12:46 stephen-Inspiron-545 kernel: DMI: Dell Inc. Inspiron 545/0N826N, BIOS A12 11/17/2009
Dec 14 12:12:46 stephen-Inspiron-545 kernel: tsc: Fast TSC calibration using PIT
Dec 14 12:12:46 stephen-Inspiron-545 kernel: tsc: Detected 2925.911 MHz processor
Dec 14 12:12:46 stephen-Inspiron-545 kernel: e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
Dec 14 12:12:46 stephen-Inspiron-545 kernel: e820: remove [mem 0x000a0000-0x000fffff] usable
Dec 14 12:12:46 stephen-Inspiron-545 kernel: last_pfn = 0x170000 max_arch_pfn = 0x400000000
Dec 14 12:12:46 stephen-Inspiron-5...

[Stephen Lawrence (web-stephen)]

Screenshots (video)
I enable video, close/minimise a number of windows until the desktop appears, then move cursor to dock, and spurious graphic then appears

[Stephen Lawrence (web-stephen)]

Sebastien, thx - I've uploaded hopefully the stuff you suggested.

Initially I tried using the "Print Screen" button - but as soon as I
pressed it, the desktop screen fixed itself!  :-(

Stephen

On 14/12/2020 10:12, Sebastien Bacher wrote:
> Thank you for your bug report, could to a screenshot or video showing
> the issue it's a bit difficult to understand as described. Please also
> include the 'journalctl -b 0' log after triggering the issue. Nautilus
> doesn't handle the desktop anymore so reassigning to gnome-shell which
> is a better start point for rendering issues
>
> ** Package changed: nautilus (Ubuntu) => gnome-shell (Ubuntu)
>
> ** Changed in: gnome-shell (Ubuntu)
> Importance: Undecided => Low
>
> ** Changed in: gnome-shell (Ubuntu)
> Status: New => Incomplete
>

[Daniel van Vugt (vanvugt)]

Yes it's annoying sometimes that the process of screenshotting actually changes the way the screen is drawn :(

[Daniel van Vugt (vanvugt)]

Thanks for the video. That looks like a bug in the 'desktop-icons' extension.

[Daniel van Vugt (vanvugt)]

Please:

1. Open the 'Extensions' app and verify you only have the three Ubuntu extensions installed.

2. Ensure you don't have any directory named 'extensions' under ~/.local/share/gnome-shell/

[Stephen Lawrence (web-stephen)]

Daniel,
1. - sorry, where do I find extensions app?

2. I have 3 files:
  application_state
  gnome-overrides-migrated
  notifications

[Stephen Lawrence (web-stephen)]

1. gnome extensions? - found it

I have 3:
  Desktop Icons
  UbuntuAppIndicators
  Ubuntu Dock

[Daniel van Vugt (vanvugt)]

All sounds clean and normal. Thanks.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.