SUMMARY Following recent changes to tiling introduced with https://invent.kde.org/plasma/kwin/-/commit/596ce0b3a08b2fd304b809d923ff21267e25dc65, windows can't be quick-tiled to the left as the first tiling action applied to them. STEPS TO REPRODUCE 1. Have a window that's either windowed or maximized, but *not* tiled 2. Press Meta+Left OBSERVED RESULT Nothing happens EXPECTED RESULT The window is tiled to the left ADDITIONAL INFORMATION Pressing Meta+Right successfully tiles the window to the right, and in that state, Meta+Left will tile it to the left.
Hmm, it appears to be slightly more complex than I had first thought: - Firefox and Thunderbird (native Wayland) can't be tiled to the left in this manner - Discord (XWayland) works fine - NeoChat, Elisa, Systerm Settings and Dolphin (native Wayland) can't be right-tiled in this manner Scale factor does not appear to be a factor; reproduced at 200% scale as well as 175% scale.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/6892
Git commit 48768538f3d07fbc963dcb94ff09bcc834879a08 by Vlad Zahorodnii. Committed on 12/12/2024 at 16:18. Pushed by vladz into branch 'master'. tiles: Set up proper quick tile tree hierarchy When a window is moved between two quick tiles, Tile::addWindow() will evacuate the window from the previous tile in the corresponding tree. In order to achieve that, the addWindow() function finds the root tile and then walks the tree. Currently, quick tiles have no proper tile tree hierarchy setup, so the rootTile() getter is going to fail to find the correct root tile. This would eventually result in Window::requestedTile() getting stuck and not being able to drag the quick tiled window. M +35 -36 src/tiles/quicktile.cpp M +8 -8 src/tiles/quicktile.h https://invent.kde.org/plasma/kwin/-/commit/48768538f3d07fbc963dcb94ff09bcc834879a08
It's fully fixed for me with those changes!
Spoke too soon, unfortunately. I can still reproduce the issue after maximizing and de-maximizing a window multiple times. After doing that, it won't left-tile when maximized. And thereafter, after de-maximizing it, it won't left tiled when windowed either.
I believe it's resolved. The relevant changes were reverted.
Git commit 4cee3a31ba5853d1a34cc84caabf036385500ad7 by Vlad Zahorodnii. Committed on 12/03/2025 at 08:35. Pushed by vladz into branch 'master'. Fix mutual exclusivity between maximize and quick tile mode A window cannot be both tiled and maximized. However, this assumption is not always true due to the maximize() function not properly evacuating the window from the requested tile. This change makes sure that a maximized window properly leaves its tile and adds relevant tests. M +187 -0 autotests/integration/quick_tiling_test.cpp M +5 -6 src/window.cpp M +1 -1 src/window.h M +4 -17 src/x11window.cpp M +4 -2 src/xdgshellwindow.cpp https://invent.kde.org/plasma/kwin/-/commit/4cee3a31ba5853d1a34cc84caabf036385500ad7