on screen keyboard leaves dark marks on screen after being hidden

[Pierre Equoy]

Image: 19.10 beta – http://cdimage.ubuntu.com/daily-live/20190926.1/eoan-desktop-amd64.iso
Device: Dell XPS 13 7390 (201908-27305)

Steps to reproduce:
1. Make the on-screen keyboard appear by tapping on a text field on doing a swipe up on the screen with your finger (see video).
2. Tap the arrow down key to hide the OSK

Expected result: the OSK disappears

Actual result: The OSK leaves dark traces on the sides of the screen.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gnome-shell 3.34.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-10.11-generic 5.3.0-rc8
Uname: Linux 5.3.0-10-generic x86_64
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 27 17:51:29 2019
DisplayManager: gdm3
InstallationDate: Installed on 2019-09-27 (0 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Beta amd64 (20190926.1)
RelatedPackageVersions: mutter-common 3.34.0-3ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[lotuspsychje (lotuspsychje)]

Thank you for reporting this bug and make ubuntu better!

Could you also attach your graphics card chipset & driver loaded please, this might be useful
for the developers to debug.

Sudo lshw -C video

[Daniel van Vugt (vanvugt)]

Does this bug occur in only Xorg, only Wayland sessions, or in either?

[Pierre Equoy (pieq)]

$ sudo lshw -C video
  *-display
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 04
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=i915 latency=0 mode=3840x2160 visual=truecolor xres=3840 yres=2160
       resources: iomemory:600-5ff iomemory:400-3ff irq:150 memory:604a000000-604affffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff

[Pierre Equoy (pieq)]

@Daniel, I couldn't reproduce this issue on Wayland. However, I can reproduce it in the login screen (see attached snapshot).

[Pierre Equoy (pieq)]

Update: I can reproduce this also on the "Ubuntu on Wayland" session:

1. Open gedit and position the window somewhere in the middle-bottom of the screen
2. Swipe the touchscreen up to open OSK
3. Press the arrow down key on the OSK to hide the keyboard.
→ sometimes, two black rectangles remain on the sides (similar to the ones shown in osk-login.jpg)

[Daniel van Vugt (vanvugt)]

Please report the bug to upstream here:

  https://gitlab.gnome.org/GNOME/gnome-shell/issues

[Pierre Equoy (pieq)]

Upstream issue opened here: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1736

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnome-shell - 3.36.0-2ubuntu2

---------------
gnome-shell (3.36.0-2ubuntu2) focal; urgency=medium

  * d/p/overview-Fade-in-out-over-the-desktop-instead-of-replacin.patch:
    - Drop patch to fade in/out the desktop instead of replacing it, it causes
      some bugs. (LP: #1868896, #1868911)
  * d/p/keyboard-Don-t-include-keyboard-devices-when-updating-las.patch,
    d/p/keyboard-Hide-keyboardBox-after-destroying-the-keyboard.patch,
    d/p/layout-Use-translation_y-of-0-to-hide-keyboard.patch:
    - Fix OSK leaves dask mask after being hidden (LP: #1845623)

 -- Marco Trevisan (Treviño) <email address hidden> Mon, 30 Mar 2020 17:49:05 +0100