Hi inkbottle, in case your problem is not resolved, just a datapoint:
I run Debian buster with KDE and a Dell 4K monitor and X11. I did not see any of the issues you describe so far (fortunately): Graphics: Device-1: Intel UHD Graphics 630 driver: i915 v: kernel Display: x11 server: X.Org 1.20.4 driver: modesetting unloaded: fbdev,vesa resolution: 3840x2160~30Hz OpenGL: renderer: Mesa DRI Intel UHD Graphics 630 (Coffeelake 3x8 GT2) v: 4.5 Mesa 18.3. There is a 30 Hz limitation, but that is a known CPU/motherboard limitation. Rainer Am Montag, 6. April 2020, 06:50:28 CEST schrieb inkbottle: > So, I've discovered that kwin-x11 is now deprecated: > https://blog.martin-graesslin.com/blog/2018/01/kwinx11-is-feature-frozen/ > > So it is not a good idea to wait for fixings or improvements from there. > > I've tried kwin-wayland, and it works. > > But it is so broken, every single thing is broken. > > Can't change font dpi without computer freezing, need to use power button. > > It never ever remember the resolution of my screen: it always start in > resolution 1920x1080, what ever I do. (native resolution is 3840x2160) > Even re-loging lose the resolution. > > When I've tried writing a mail: "kmail is not responding". > > Rebooting fails 1 in 3 times. > > anti aliasing is not very good, it is much more difficult to read text. > > I usually use "reversed mouse wheel motion". You really can select that in > system settings, but it has no effect with wayland. > > So, in a way, the initial issue is *fixed*: there won't be any improvement, > neither from X11, nor from dpms (which I've learn doesn't log things). > > By the way, emacs was working too. So, if it wasn't for the fact that it is > crashing always. For the fact that you can't have your configuration right > however hard you try. And that it is ugly. It works. You can't do anything > with it, but in some way it does work. (And that 1 in 2 times you even have > to use power button to reboot; even, it starts rebooting, but it hangs in > halfway, and then you have to reach for the power button.) > > I use: kwin-wayland-backend-drm > Because they say: > For X11 you need e.g. on Debian based systems the package kwin-wayland- > backend-x11. For the “real thing” you need: kwin-wayland-backend-drm > https://blog.martin-graesslin.com/blog/2016/07/why-does-kwin_wayland-not-sta > rt/ > > And I haven't been able to start kwin-wayland in another tty: > export $(dbus-launch) > kwin_wayland --xwayland --socket nested > => failed > > dbus-run-session startplasmacompositor > => failed > > But starting it from sddm worked right out of the box (though not really > usable for anything) > > I've manually installed only one package: plasma-workspace-wayland, > and voila. > > On Sunday, April 5, 2020 6:35:15 PM CEST you wrote: > > It is not the first time I describe the issue. > > Instead of remaining steadily turned off, the screen is turning on and > > off. > > > > The issue occurs randomly, and I can't find any trace of it in any log. > > > > Lately it did turn on and off for hours at intervals of about 10 min. And > > it did so before reboot and after reboot. (after reboot: user logged but > > no application specifically running) > > > > As you can understand it is really infuriating: flashing lights are > > usually > > not synonymous of quietness. > > > > As I already described, the setting is a 4K Dell monitor on display port, > > on a lid closed X230. > > > > And no, I can't just turn the screen off with the power button, because if > > I do so, kde freaks out and when I turn the screen back on the resolution > > for one thing, is so far away from initial settings, that I just can't > > see a thing; and also, it takes me hours to put back the settings right. > > > > I can't even keep the lid opened, because at that resolution, additional > > screen would be too much load for the gpu. > > > > That might be a little bit out of topic, because it is not specifically > > kde > > related. But I think Gnome is using Wayland. And I've found nothing about > > this sort of issues on the web. And it is not debian stable neither. irc > > seems a thing of the past... matrix.org debian-next is not working yet. > > xorg had never ever answered any question. I could make a bug report, but > > I > > don't know against what exactly. > > > > Only answer I've had, so far is "dpms and x11 are a crock of shit > > together, > > and web browsers are hilariously unpredictable actors in the x11 > > ecosystem" > > But I haven't found similar comments on the net. And it is not really > > hinting to any course of action. > > > > And again, I haven't been able to associate any traces of the > > malfunctioning with any logs: nothing specific seems to be recorded in > > the logs when the screen is flashing like a Christmas tree. > > > > I'm using rsyslogd and > > SYSTEMD_LESS=FRXMK journalctl -xa > > seems to show me everything there is. > > I haven't seen anything relevant in > > /var/log/Xorg.0.log > > > > Worth mentioning: I put the pc to sleep with: (the screen that is [*]) > > xset dpms 10 10 10; sleep 10; xset dpms force off > > Then "C-l" > > Then after entering my password: > > xset dpms 1800 2700 3600 > > > > But I don't thing it really influences the flashing effect; only the > > frequency of the flashing. > > > > Again, 9 times out of 10, it doesn't flash at all be behaves itself, like > > a > > good pc. > > > > [*] I cannot put the PC to sleep, nor suspend... I can, but it's > > complicated, and I don't think it works well. > > Because to restart the laptop, I'll have to make some event. But the lid > > is > > closed. So I'd have to manipulate the lid, but then kde will see that as a > > dual screen configuration, and it will freak out, and I will loose all my > > screen settings. > > > > When I restart the PC, I have to make a special dance: > > Open the lid; Press power button; > > Wait for grub screen... > > Then, at that moment, and that moment only, > > close the lid! > > Can you imagine the hassle. > > > > There must be much better solutions that I missed; only, I haven't found > > them yet. -- Rainer Dorsch http://bokomoko.de/