After compiling and running the latest LyX 2.0 RC1, the problem still persists. My minimise workaround got a bit more tedious (having to retry a few times).
The lag (with maxed out CPU usage) happens when both scrolling and writing (but not when opening menus) and depends on the window size. For tiny windows, it's nearly imperceptible, full screen windows are unusably slow. Thus it might have something to do with redrawing. The maximum "lag free" (yet with 80%-100% CPU usage) size with Evince minimised is about 600x600, with Evince right besides LyX roughly 250x250. My current paper is relatively straightforward: paragraphs with lots of math formulas. Every other document I tried exhibits the same behaviour. However, after turning off Compiz, everything went smoothly, without a single lag. Since I really don't want to miss Compiz' usability extensions, I hoped to find some config settings (direct output, syncing, ...) to improve the situation. Fiddling around in CCSM and nvidia-settings was fruitless so far. Turning on Metacity's compositing feature (without Compiz) reintroduced the lag. I tried recompiling with ./configure --enable-debug ... but what is supposed to be done then? Currenly my best bet is using LyX in a 600x600 window and applying the minimise-Evince workaround, which isn't exactly enjoyable, but more acceptable than turning off Compiz. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/353449 Title: lyx 1.6.x impossibly slow -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
