| Summary: | "Always visible" top panel in multi-screen environment influences faulty the other screens | ||
|---|---|---|---|
| Product: | [Plasma] plasmashell | Reporter: | Graham Powell <gapowell> |
| Component: | Panel | Assignee: | Plasma Bugs List <plasma-bugs-null> |
| Status: | RESOLVED LATER | ||
| Severity: | normal | CC: | mvourlakos, nate |
| Priority: | NOR | ||
| Version First Reported In: | 5.16.2 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Manjaro | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: |
three monitor setup
QT window top most position, no panel on third monitor plasma top panel Latte layout file |
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Description
Graham Powell
2019-07-26 17:36:05 UTC
With plasma panel don't you have the same issue? Send also a screenshot demonstrating the issue and your screens layout I did try with the Plasma panel, and it lets me move windows to the top of non-panel screens. There is a slight snapping bump at the panel height, but it still lets me move the window to the top. I've attaching screenshots of my three monitor layout, and one of the right monitor with Dolphin as high as I can move it. Created attachment 121746 [details]
three monitor setup
Created attachment 121747 [details]
QT window top most position, no panel on third monitor
I've added a screenshot showing it working correctly with plasma panel at the top. Created attachment 121748 [details]
plasma top panel
Is this on X11 or wayland? X11 Can you also send the Latte layout file in case I can not reproduce? Created attachment 121758 [details]
Latte layout file
in my system I close Latte and add a top plasma panel... same issue appears... I think this is described as X11 limitation, some info about it https://forum.kde.org/viewtopic.php?f=66&t=102303 (In reply to Michail Vourlakos from comment #13) > I think this is described as X11 limitation, some > info about it https://forum.kde.org/viewtopic.php?f=66&t=102303 Although similar, it's not the same issue. That user had issues with the panel covering the maximized window when set to "Always Visible". What we do have in common is the issue is only when a panel is in the top position. The long-standing X bug/limitation has to do with monitors of different heights (from my understanding). Mine monitors are all identical height. I did try with both Plasma and Latte again, and double checked all my settings to make sure I'm not crazy, and I still don't get this behavior with a Plasma panel. I can move the window to the top of a secondary monitor with the panel set to "Always Visible". With Latte I can't unless I set it to "Windows go Below", which of course means I cut off the top of my window when maximizing on my primary screen. It also seems odd to me that I can maximize a window to the top of the screen on secondary monitors using Latte, but I can't move the window to the top of the screen. It also seems odd that it only happens when using a latte panel on the top of the screen. When using a panel on the bottom everything works as expected. Oh, and I forgot to mention this is only for QT apps. GTK apps work exactly as expected on both panel and non-panel monitors. Plasma panels on the top and bottom (when set to Always Visible), and Latte panel in the bottom position only, will snap a window to the panel, but you can also force the window below it with some mouse pressure. On Latte, this only works in the bottom position. The top has a hard stop for QT apps. And please recognize that I am not complaining, or expect you to fix this right away (or ever). I fully understand how hard it is to create a great product in your spare time, which is something you have very much accomplished! Nope, the theoretical part is pretty clear. X11 considers multi screen environments a single big working area. When a panel is setting struts the Always Visible case then this area is reduced and that applies to all screens as long as the screens have the same y value. One way to workaround should be the following, the screens The screens that do not have a top panel you can lower them a bit at your plasma settings, screens OR you can disable the snapping feature of KWin from plasma systemsettings, either way should work. The big question is why you do not have the issue with plasma panel even though you should according to X11 definitions. I looked at plasma panel code and the struts code is the same with Latte > The big question is why you do not have the issue with plasma panel even
> though you should according to X11 definitions. I looked at plasma panel
> code and the struts code is the same with Latte
I don't have the issue with other panels as well. Although those other panel are on other desktops and window managers (Cinnamon, Budgie, XFCE), so fairly different environment.
I've narrowed it down a bit more. Because GTK CSD windows (ie. Firefox) worked fine, I tried an a couple of Aurorae themes it worked as well. So it's only an issue with Breeze window decorations. Weird...
I don't think we have the resources to fix this given how esoteric of an issue it is and our focus on Wayland going forward. Sorry if that's not the answer folks were looking for. Resources are limited and we need more developers to help out to fix small unusual workaroundable issues like this. |