https://bugs.kde.org/show_bug.cgi?id=489382
RedBearAK <redb...@redbearnet.com> changed:
What |Removed |Added
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CC| |redb...@redbearnet.com
--- Comment #1 from RedBearAK <redb...@redbearnet.com> ---
I am also observing this on Fedora (with Plasma 6.1.1) where it happens
relatively frequently, and I also saw it a couple of times in openSUSE
Tumbleweed (also with the Plasma 6.1.1 update).
When it starts happening, it can be observed in any app window that will do
something in reaction to a Tab key press, such as inserting 4 spaces, which
most of my code editors and text editors are set to do. Obsidian will indent a
line or selected block of text when it sees a Tab key.
It doesn't happen each time, but when it does I can keep holding the Alt key
and just keep Tabbing through the "Large Icons" layout and see the app window
behind the tab box receiving another Tab key press each time.
When switching to Alt+Shift+Tab to move through the icons in reverse (without
releasing Alt), the app window behind doesn't seem to ever react with a Backtab
operation, but going back to Alt+Tab will continue to send Tabs into the app
window, until I release the Alt key and actually switch (or stay in the same
app because that was the selected icon).
The task switcher dialog otherwise seems to act normally as far as moving to
the next icon with each Tab, and switching to the selected window/app.
Here is maybe an important addition, though it shouldn't come as a surprise.
Sometimes the same thing happens with the Grave key (the backtick/tilde key
above Tab on the US keyboard layout). I will end up with some Grave characters
"````" in the window behind the tab box. For as many times as I hit Tab without
releasing Alt.
So there is a general input isolation problem happening with the tab box, with
the non-modifier key.
There is a line that will spam the journal for as long as I hold the Alt key
with the tab box visible. I only noticed this while using the default
visualizer that shows window previews, and a terminal window was open in the
background showing the journal.
```sh
Jun 29 04:20:31 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:31 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:31 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
Jun 29 04:20:33 fedora-3700u kwin_wayland[4291]: kwin_scene_opengl: 0x3:
GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_BACK_LEFT)
```
Those lines will just keep going as long as I hold the Alt key.
Then when I release the Alt key and do the window switch, these lines will
appear. Seems to be the same number of them each time.
```sh
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
Jun 29 11:47:39 fedora-3700u plasmashell[4494]:
org.kde.plasma.keyboardindicator: Unknown key Qt::Key_Alt
```
I don't know if these lines in the journal actually have anything to do with
the input isolation issue, or are just coincidental. But they are consistently
happening when task switching with Alt+Tab.
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