https://bugs.kde.org/show_bug.cgi?id=406180
--- Comment #49 from Guilherme Almeida <guilhermealme...@protonmail.com> --- (In reply to Erik Kurzinger from comment #48) > (In reply to Guilherme Almeida from comment #47) > > (In reply to Luca Carlon from comment #22) > > > Hello, I'm also affected by this issue. It is so severe that the system > > > was > > > hardly usable. I just noticed one thing: I suspect the issue appears for > > > me > > > only when drm is enabled with nvidia-drm.modeset=1. By default this was > > > not > > > set in Kubuntu 18.10 and 19.04 (may explain why Peter Eszlari could not > > > reproduce?). Unfortunately drm is the only way I found to prevent > > > horizontal > > > tearing. > > > No idea if this info is already known or of any help to you. > > > > I can confirm that, Luca. Using PRIME on Manjaro 18.0.4, I changed > > /etc/modprobe.d/nvidia-drm.conf, setting like this options nvidia_drm > > modeset=0 and the the frezze has stoped. I haven't noticed tearing so far, > > but if happens I will edit this reply. > > Note that the reason this resolves the issue is that is disables PRIME > synchronization entirely (see > https://devtalk.nvidia.com/default/topic/957814/linux/prime-and-prime- > synchronization/ for details). So tearing would be expected, since this is > how the NVIDIA driver is made aware of each vblank by the Intel driver. > > Only disabling vsync for the QtQuick pop-ups would definitely be a > preferable solution, I think. Yeah, I've noticed... Is strange that this problem affects users from differents ways? I mean... One user reported (https://forum.manjaro.org/t/kde-plasma-freeze-when-i-use-screen-edges-kwin-hang-regression/88897/31?u=fvguilherme) that simple install kwin-lowlatency from AUR instead of kwin has solved the problem. and yes, I've noticed a little horizontal tearing. I choose keep the freeze. -- You are receiving this mail because: You are watching all bug changes.
