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[Bug 2119066] Re: X11 touchscreen events are handled as mouse events

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** Description changed:

  Upstream issue: https://gitlab.gnome.org/GNOME/gtk/-/issues/7515
  
  - Touchscreens are under "Virtual core pointer" virtual device in X11, and the virtual device is recognized as a `GDK_SOURCE_MOUSE`.
  - in `gdk/x11/gdk/x11/gdkdevicemanager-xi2.c`, `gdk_touch_event_new` is passed with the virtual device.
  - There are many places that checks whether the event is from touchscreen or mouse, by using `gdk_device_get_source` on the device included in the event above, which is `GDK_SOURCE_MOUSE` despite a touchscreen physical device is used.
  
+ This issue caused bugs for LP:# 2051886 and LP: #2119065, as they
+ interpret touchscreen input as mouse events, and expect it to input like
+ a mouse.
+ 
  A ubuntu-bug report will be submitted later
- --- 
+ ---
  ProblemType: Bug
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckMismatches: ./.disk/casper-uuid-oem ./casper/initrd ./casper/minimal.standard.live.hotfix.size ./casper/minimal.standard.live.size ./casper/minimal.manifest ./casper/minimal.standard.manifest ./casper/minimal.standard.size ./casper/minimal.hotfix.size ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.standard.hotfix.size ./casper/minimal.hotfix.squashfs ./casper/minimal.standard.live.manifest ./casper/minimal.size ./boot/grub/grub.cfg
  CasperMD5CheckResult: fail
  CurrentDesktop: ubuntu:GNOME
  DistributionChannelDescriptor:
-  # This is the distribution channel descriptor for Ubuntu 24.04 for Dell
-  # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
-  canonical-oem-somerville-noble-oem-24.04b-20250714-538
+  # This is the distribution channel descriptor for Ubuntu 24.04 for Dell
+  # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
+  canonical-oem-somerville-noble-oem-24.04b-20250714-538
  DistroRelease: Ubuntu 24.04
  InstallationDate: Installed on 2025-07-15 (15 days ago)
  InstallationMedia: Ubuntu OEM 24.04.2 LTS "Noble Numbat" - Release amd64 (20250714)
  Package: libgtk-4-1 4.14.5+ds-0ubuntu0.1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 6.11.0-1025.25-oem 6.11.11
  Tags: noble
  Uname: Linux 6.11.0-1025-oem x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users
  _MarkForUpload: True

** Description changed:

  Upstream issue: https://gitlab.gnome.org/GNOME/gtk/-/issues/7515
  
  - Touchscreens are under "Virtual core pointer" virtual device in X11, and the virtual device is recognized as a `GDK_SOURCE_MOUSE`.
  - in `gdk/x11/gdk/x11/gdkdevicemanager-xi2.c`, `gdk_touch_event_new` is passed with the virtual device.
  - There are many places that checks whether the event is from touchscreen or mouse, by using `gdk_device_get_source` on the device included in the event above, which is `GDK_SOURCE_MOUSE` despite a touchscreen physical device is used.
  
- This issue caused bugs for LP:# 2051886 and LP: #2119065, as they
+ This issue caused bugs for LP: #2051886 and LP: #2119065, as they
  interpret touchscreen input as mouse events, and expect it to input like
  a mouse.
  
  A ubuntu-bug report will be submitted later
  ---
  ProblemType: Bug
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckMismatches: ./.disk/casper-uuid-oem ./casper/initrd ./casper/minimal.standard.live.hotfix.size ./casper/minimal.standard.live.size ./casper/minimal.manifest ./casper/minimal.standard.manifest ./casper/minimal.standard.size ./casper/minimal.hotfix.size ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.standard.hotfix.size ./casper/minimal.hotfix.squashfs ./casper/minimal.standard.live.manifest ./casper/minimal.size ./boot/grub/grub.cfg
  CasperMD5CheckResult: fail
  CurrentDesktop: ubuntu:GNOME
  DistributionChannelDescriptor:
   # This is the distribution channel descriptor for Ubuntu 24.04 for Dell
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-noble-oem-24.04b-20250714-538
  DistroRelease: Ubuntu 24.04
  InstallationDate: Installed on 2025-07-15 (15 days ago)
  InstallationMedia: Ubuntu OEM 24.04.2 LTS "Noble Numbat" - Release amd64 (20250714)
  Package: libgtk-4-1 4.14.5+ds-0ubuntu0.1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 6.11.0-1025.25-oem 6.11.11
  Tags: noble
  Uname: Linux 6.11.0-1025-oem x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users
  _MarkForUpload: True

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to gtk4 in Ubuntu.
https://bugs.launchpad.net/bugs/2119066

Title:
  X11 touchscreen events are handled as mouse events

Status in gtk4 package in Ubuntu:
  New

Bug description:
  Upstream issue: https://gitlab.gnome.org/GNOME/gtk/-/issues/7515

  - Touchscreens are under "Virtual core pointer" virtual device in X11, and the virtual device is recognized as a `GDK_SOURCE_MOUSE`.
  - in `gdk/x11/gdk/x11/gdkdevicemanager-xi2.c`, `gdk_touch_event_new` is passed with the virtual device.
  - There are many places that checks whether the event is from touchscreen or mouse, by using `gdk_device_get_source` on the device included in the event above, which is `GDK_SOURCE_MOUSE` despite a touchscreen physical device is used.

  This issue caused bugs for LP: #2051886 and LP: #2119065, as they
  interpret touchscreen input as mouse events, and expect it to input
  like a mouse.

  A ubuntu-bug report will be submitted later
  ---
  ProblemType: Bug
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckMismatches: ./.disk/casper-uuid-oem ./casper/initrd ./casper/minimal.standard.live.hotfix.size ./casper/minimal.standard.live.size ./casper/minimal.manifest ./casper/minimal.standard.manifest ./casper/minimal.standard.size ./casper/minimal.hotfix.size ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.standard.hotfix.size ./casper/minimal.hotfix.squashfs ./casper/minimal.standard.live.manifest ./casper/minimal.size ./boot/grub/grub.cfg
  CasperMD5CheckResult: fail
  CurrentDesktop: ubuntu:GNOME
  DistributionChannelDescriptor:
   # This is the distribution channel descriptor for Ubuntu 24.04 for Dell
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-noble-oem-24.04b-20250714-538
  DistroRelease: Ubuntu 24.04
  InstallationDate: Installed on 2025-07-15 (15 days ago)
  InstallationMedia: Ubuntu OEM 24.04.2 LTS "Noble Numbat" - Release amd64 (20250714)
  Package: libgtk-4-1 4.14.5+ds-0ubuntu0.1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 6.11.0-1025.25-oem 6.11.11
  Tags: noble
  Uname: Linux 6.11.0-1025-oem x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users
  _MarkForUpload: True

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References

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