In my screenshots, the transparency in Konsole is set to 90%, and the background is black. I am not going to try to explain this in much detail; rather, I took some screenshots and a video. It looks to me like the content of the terminal or of a line in the terminal is overlain on itself every time its contents are updated. Reproducible: Always Steps to Reproduce: 1. Ensure that you are using either the Oxygen or Oxygen transparent widget style. (I am not completely sure this is necessary.) 2. In Konsole, set the background transparency to something really obvious but below 100%. In the screenshots I used 90%. The background color does not really matter. I used black. 3. In Dolphin, open the terminal panel and experiment. If you simply press enter repeatedly, the entire background should turn black. Actual Results: The background does exotic things, resulting in illegibility and other oddities. Expected Results: The background color should stay constant. I would actually love it if this was fixed up into a proper feature, and then Konsole could have motion blur support! But I completely understand that is not going to happen.
Created attachment 84773 [details] Demonstration screenshot of glitches.
Created attachment 84774 [details] Demonstration screenshot of glitches (2).
Created attachment 84775 [details] Demonstration screenshot of glitches (3).
Thanks for the bug report. Dolphin itself doesn't do any drawing on the screen directly. So I assume that this is either a style problem, a bug in Qt, or a graphics driver issue. Since you say that you can only reproduce this with Oxygen, I'll reassign the report there.
Should happen only with oxygen-transparent. Not oxygen. Can you confirm ?
Link to video demonstration of glitches (7.9 MB): http://67.189.30.233/bugs/videos/dolphin_terminal_bug_1.ogv
(In reply to comment #5) > Should happen only with oxygen-transparent. Not oxygen. Can you confirm ? Yes, that is correct.
I'm using an Intel HD Graphics 3000 GPU, but the problem persists if I switch to XRender compositing, so I think it's not a problem with the graphics driver.
Created attachment 84776 [details] Screenshot of ghost images left by dragging a folder icon across the terminal (Nvidia GPU)
Also happens here. Dragging icons/other windows over the dolphin terminal leaves ghost images behind. (attached screenshot) Oxygen Transparent Nvidia GTX 460
simple test: does it happen with an ARGB Bespin or QtCurve configuration as well?
Oxygen-Transparent is unmaintained, so we unfortunately have to close all tickets. Other style engines (QtCurve, Kvantum) might also offer transparency.