In KDE System Settings under Display and Monitor, you can set a monitor to be rotated 90 degrees. When you rotate a monitor, the width of yakuake does not take the proper width of the screen on the rotated monitor. I have width set to 90% for Yakuake, when on my horizontal monitor, it works perfectly fine. When on the vertical monitor, it only takes up a small portion of the screen. If it matters, I have it rotated 90 degrees counterclockwise. Reproducible: Always Steps to Reproduce: 1. Rotate a monitor 90 degrees counter clockwise, change settings in Display Configuration to reflect the physical monitor changes 2. Open Yakuake on the rotated display Actual Results: The Yakuake window does not take up 90% of the screen, more like a quarter of it. Expected Results: The Yakuake window should take up 90% of the width of the screen.
It seems to be fixed, but I changed Display Configuration -> Scale Display to 1.0 and it was set higher before when the problem was happening. I recently upgraded to 4k and I have been adjusting things to make things work better. Still on Yakuake 3.0.2, though I did upgrade some other KDE libraries in the last update to the system.
*** This bug has been marked as a duplicate of bug 389448 ***