Open any text editor, word processor or spreadsheet program and enter some random text long enough to make a vertical scrollbar appear (or whatever you want in the spreadsheet program since scrollbars are already there). Select the text (or minimum two cells for spreadsheets) and start to drag it with the mouse without releasing the mouse button. The scrollbar is now unable to scroll up and down through the document until you drop what you are dragging. Tested with several KDE and non-KDE apps (Kate, LibreOffice Calc and Writer, Mailspring, Opera browser) and all exhibit the same behaviour. With previous KDE releases you could drag, scroll, then drop.
Sorry, I made a mistake. When I said "The scrollbar is now unable to scroll up and down" I actually meant, "The scroll wheel is now unable to scroll up and down"
Are you using Libinput as your input driver? X or Wayland?
(In reply to Nate Graham from comment #2) > Are you using Libinput as your input driver? X or Wayland? I don't know. I'm on Kubuntu, so whatever that uses by default.
Which version of Kubuntu? (you're probably using Libinput, but I just want to make sure)
(In reply to Nate Graham from comment #4) > Which version of Kubuntu? > > (you're probably using Libinput, but I just want to make sure) It's Kubuntu 18.04. Looks like libinput and X11. mike@mike-home:~$ xinput --list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ ZLY ZELOTES GAME MOUSE id=9 [slave pointer (2)] ⎜ ↳ Gaming KB Gaming KB id=10 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Gaming KB Gaming KB id=12 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Gaming KB Gaming KB id=11 [slave keyboard (3)] mike@mike-home:~$ xinput list-props 9 Device 'ZLY ZELOTES GAME MOUSE': Device Enabled (147): 1 Coordinate Transformation Matrix (149): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000 libinput Natural Scrolling Enabled (282): 0 libinput Natural Scrolling Enabled Default (283): 0 libinput Scroll Methods Available (284): 0, 0, 1 libinput Scroll Method Enabled (285): 0, 0, 0 libinput Scroll Method Enabled Default (286): 0, 0, 0 libinput Button Scrolling Button (287): 2 libinput Button Scrolling Button Default (288): 2 libinput Middle Emulation Enabled (289): 0 libinput Middle Emulation Enabled Default (290): 0 libinput Accel Speed (291): 0.000000 libinput Accel Speed Default (292): 0.000000 libinput Accel Profiles Available (293): 1, 1 libinput Accel Profile Enabled (294): 1, 0 libinput Accel Profile Enabled Default (295): 1, 0 libinput Left Handed Enabled (296): 0 libinput Left Handed Enabled Default (297): 0 libinput Send Events Modes Available (267): 1, 0 libinput Send Events Mode Enabled (268): 0, 0 libinput Send Events Mode Enabled Default (269): 0, 0 Device Node (270): "/dev/input/event3" Device Product ID (271): 7511, 44311 libinput Drag Lock Buttons (298): <no items> libinput Horizontal Scroll Enabled (299): 1 mike@mike-home:~$ loginctl show-session 2 -p Type Type=x11
Thanks! This is a Libinput issue, so please report it upstream at https://gitlab.freedesktop.org/libinput/libinput
(In reply to Nate Graham from comment #6) > Thanks! This is a Libinput issue, so please report it upstream at > https://gitlab.freedesktop.org/libinput/libinput Will do. Thanks for your response.
Filed the bug with libinput and this was the response: > this isn't a libinput bug, it's a bug either in the application or the toolkit. https://gitlab.freedesktop.org/libinput/libinput/issues/41
Hmm, darn. So you're saying this broke with Plasma 5.12, but worked properly in older versions of KDE Plasma?
I remember scrolling while dragging before, however I don't have an old install to test on. It's not exactly something you do every day, so it could be a while ago that this bug appeared. However it turns out this is not just a KDE bug. I have Gnome, Gnome on Xorg, Plasma, Ubuntu, Ubuntu on Wayland and Unity installed and all of them exhibit the same behavior.
That really suggests a libinput but to me; it's unlikely all major DEs and GUI toolkits regressed simultaneously. Might try pushing back a bit on the upstream Libinput bug report. Make sure to mention that it affects all versions of everything. Let me know how that goes, and I can try to help out there if you encounter resistance.
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Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!