Hi, Several updates ago, not sure exactly when, I've experienced new rare and strange glitch: it looks interlined (not one by one though, more like 3-by-1), some rows looks fine, some aren't. Glitch is pretty rare. Mostly've noticed it on: 1. NetBeans splash screen (for some time it looks interlined, then it goes OK) 2. KMail message composer window — only text message frame and scrollbar are interlined, inner text is fine 3. Menu selected item. I can't make screenshot as every redraw vanish it and everything goes normal again. And can't reproduce it every time, just noticed that KMail glitch may come after switching from one desktop to another (window activating is enough). I've made a photo (sorry, only KMail, ATM): https://photos.app.goo.gl/RmCUpvYXFlEnTM5p1 Maybe connected to this: once I've got unchanged Chromium content hasn't updated but changing window opacity (by scrolling on window titlebar) made everything fine. It looks to me like some KWin composition or Intel driver problem, but can't manage stable reproducing of this glitch. Had anyone seen it? Some tech info: openSUSE (obviously) Tumbleweed x86_64 (0712 but was seen before) Intel i7-6700HQ with Intel HD Graphics 530 (NVidia card is present but usually is switched off, proprietary drivers, Bumblebee/BBSwitch) KDE Plasma 5, KWin (X11) with composition on, Breeze style for both KWin and widgets (have checked other). -- Kind regards, Mykola Krachkovsky -- Найкращі побажання, Микола Крачковський