'Twas brillig, and Peter Hutterer at 26/12/08 00:25 did gyre and gimble: > On Wed, Dec 24, 2008 at 11:41:10AM +0000, Colin Guthrie wrote: >>> Just built the 1.6 branch + recent mesa snapshot and other such stuff. >>> >>> It seems to be stable enough just now, but one thing that's been >>> affected is how the mouse positions itself to top-left after a certain >>> operations. >>> >>> So far I've found odd behaviour when doing: >>> * Compiz cube dragging (ctrl+alt+click and drag) >>> * Compiz window moving (alt+click and drag) >>> * Compiz window moving (click and drag on title bar) >>> >>> When this happens the mouse just jumps to the top left, but not always >>> immediately. > > >>> While this could easily be a compiz issue (I certainly cannot reproduce >>> in metacity), I'm guessing it's related to the xserver change. I have >>> also updated to the latest input-proto and other such stuff too. >>> >>> Is there an obvious starting point to look further into this? Or perhaps >>> it's a known issue? > > can you reproduce this with any other client too? It's most likely an X server > issue, but a good reproduceable behaviour in a client other than compiz makes > it easier for me to find the bug. > My first guess is that event replay after synchronous grabs have the wrong > coordinates. > You say it doesn't always happen immediately: try to move particularly fast or > slow to see if that can trigger it.
It's really hard to describe! Speed of movement doesn't seem to make much odds but I have narrowed down the behaviour to the "Snapping Windows" compiz plugin. Disabling this makes things a lot more stable but there are still some issues. Every time I move the cube face, either with a window drag to the edge, or with a keystroke, the mouse pointer zaps to the top left. I can't duplicate the behaviour in metacity, but I've not tried in Kwin4 yet. I'm not 100% certain it's a xserver issue here and perhaps compiz is hooking into something it shouldn't be, but it's certainly a regression of sorts. Not really sure how to give you better info to help diagnose :( I'll try asking on compiz IRC to see if anyone else is experiencing the same issues. >> I'm thinking that there is *something* up with mouse moves generally. >> Simple things like hovering the mouse over a link in firefox is also a >> bit odd. Hard to describe really but it seems that the "hover" event (in >> web/js event terminology) only happens when the mouse is actually >> *moving* not when it's just settled over the link. > > A NotifyInferior event sent when moving the mouse from the menu bars into the > main window has the wrong subwindow information. This causes some internal > state in firefox to go nuts. Attributed to the wrong enter/leave model, see > also > > http://lists.freedesktop.org/archives/xorg/2008-December/041696.html > http://bugs.freedesktop.org/show_bug.cgi?id=19086 Thanks Peter. The patck on #19086 appears to be working nicely for me. Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mandriva Linux Contributor [http://www.mandriva.com/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/] _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg