https://bugs.kde.org/show_bug.cgi?id=275433
--- Comment #20 from Claudius Ellsel <claudius.ell...@live.de> --- (In reply to Michael Butash from comment #19) > I started watching this thread, as I struggle daily with KDE to just > maintain some sanity with a dock/undock scenario with various displays. > Multi-monitor has been dysfunctional since 4.x kde days, and it seems still > is. > > I use a laptop as my main rig now with a TB3 dock adding 2x 4k displays. > Anytime this changes, KDE simply loses my settings, totally forgets, craps > the bed, crashes compositing, about whatever you can imagine it might do > poorly, it does. Not that most DE's are much better, KDE is particularly > confounding. > > If I dock, setup display manager for 3x 4k/60hz displays accordingly, I > expect it knows to revert back to that when it sees the dock and displays > attached. Instead it goes bonkers, reverts randomly to who knows what, and > tends to just reset settings in weird ways. Sometimes the dock or > DP-to-HDMI adapters reset to odd resolutions (like 1080p only), which freaks > it out even worse, but it's random how KDE responds to reconfigure the > desktop, and usually horribly. > > I cannot get KDE to act the same way twice in any scenario > display/resolution-wise. Why it cannot, is beyond me other than bugs or > unexpected behaviour, which for a laptop is not to be unexpected jacking > into random displays extensions. > > Even the same setups reset every time, so it's 50 first dates every time I > connect my display. It resets resolution, position, refresh rate, sometimes > randomly mirrors, just all over the place. Even more confounding, my > displays reverse, randomly it disables my main laptop displays, and other > things I just can't rationalize other than being possessed by a spirit of > chaos. > > The worst thing is when I happen to accidentally power off a display, to > bring it back up, and it starts hiding my windows. Since being TV displays, > I use a remote to power them up/down, and occasionally it shuts off the > wrong display. My TB3 dock can only use 2x of the displays, so my 3rd I use > for other things. If the remote powers down the display, it really freaks > KDE out that I simply cannot use the display. Shutting off the display > while connected will cause KDE/xrandr to reposition things as it sees a > temporary change, but even bringing it back online, if I move a window to > that display, it hides it entirely as though offscreen. This is the > freakin' worst, as it is unresolvable without a hard reboot, even restarting > sddm will not resolve. > > This is super hard to explain how much grief KDE gives me with > multi-monitor. Compositing in KDE is the worst at full 3x 4k display > resolution, even youtube stttttuddddddders constantly on a fresh reboot to > make it almost unusable, but the compositing itself behaves randomly. KWin > crash randomly, which is apparent immediately, and restarting it from > display settings/compositing, disabling it will enable it, and vise-versa > oppositely. Almost every aspect of display settings from resolution to > monitor alignment to compositing is buggy to control in a predicable fashion. > > The KDE display subsystem is just simply dysfunctional. I've tried digging > for significant log events or anything to tip me off to something easily > resolvable, but there is nothing. Xrandr looks good, just KDE can't seem to > manage display settings consistently for whatever reason. I just skimmed through your pretty long text. It does not really seem to be related to this issue, if I am not mistaken. The title of this bug might be pretty broad, but that does not mean that all multimonitor problems are tracked here. There might be already opened specific bug reports for your problems. If not I encourage you to open them yourself. Most problems are probably rooted in KWin. -- You are receiving this mail because: You are watching all bug changes.
