On Sat, May 5, 2018 at 8:50 PM, Mario Kleiner <mario.kleiner...@gmail.com> wrote: > Thanks. Can you see if you get any freezes in kwin_x11 by "violent > alt-tabbing" with patch 1? I've seen two such freezes within 8 hours > of normal use yesterday, each occuring when i alt-tabbed (normally) > and the switcher side panel moved out from the left. Desktop was > mostly blocked then, i assume it was kwin_x11 that got stuck. When > VT-switching to the console and attaching gdb to kwin_x11 the > backtrace showed it blocked in the loader_dri3_swapbuffer_barrier() > from patch 1. I don't know if that was the cause of the freeze, or if > something unrelated was going wrong and kwin just happens to block > there when one VT switches away from the X-Server while kwin does its > thing. Freezes happened both with compositing enabled and disabled.
Yes, I can confirm it happened to me as well now with patch 1. Happened when holding Alt + Tab, but I had to try a few times. I logged in directly with sddm and got the following backtrace without VT switch by ssh session. So should be a clean one: #0 0x00007f4517e1074d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007f4516d32172 in poll (__timeout=-1, __nfds=1, __fds=0x7ffed4e8ead0) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46 #2 _xcb_conn_wait (c=c@entry=0xcc4be0, cond=cond@entry=0x19ef968, vector=vector@entry=0x0, count=count@entry=0x0) at /home/roman/dev/gfx/xcb/src/libxcb/src/xcb_conn.c:479 #3 0x00007f4516d33e69 in xcb_wait_for_special_event (c=0xcc4be0, se=0x19ef940) at /home/roman/dev/gfx/xcb/src/libxcb/src/xcb_in.c:795 #4 0x00007f450d764d36 in dri3_wait_for_event_locked (draw=0x1a28288) at ../../src/mesa/src/loader/loader_dri3_helper.c:457 #5 0x00007f450d765568 in loader_dri3_wait_for_sbc (draw=draw@entry=0x1a28288, target_sbc=47, target_sbc@entry=0, ust=ust@entry=0x7ffed4e8eca0, msc=msc@entry=0x7ffed4e8eca8, sbc=sbc@entry=0x7ffed4e8ecb0) at ../../src/mesa/src/loader/loader_dri3_helper.c:534 #6 0x00007f450d76560b in loader_dri3_swapbuffer_barrier (draw=0x1a28288) at ../../src/mesa/src/loader/loader_dri3_helper.c:1930 #7 loader_dri3_drawable_fini (draw=0x1a28288) at ../../src/mesa/src/loader/loader_dri3_helper.c:238 #8 0x00007f450d75aaad in dri3_destroy_drawable (base=0x1a28250) at ../../src/mesa/src/glx/dri3_glx.c:349 #9 0x00007f450d7537d2 in driReleaseDrawables (gc=gc@entry=0x1542920) at ../../src/mesa/src/glx/dri_common.c:481 #10 0x00007f450d75af0c in dri3_bind_context (context=0x1542920, old=<optimized out>, draw=41946959, read=41946959) at ../../src/mesa/src/glx/dri3_glx.c:198 #11 0x00007f450d746537 in MakeContextCurrent (dpy=0xcc3850, draw=41946959, read=41946959, gc_user=0x1542920) at ../../src/mesa/src/glx/glxcurrent.c:213 #12 0x00007f44fd3056fd in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so #13 0x00007f45157d5229 in QOpenGLContext::makeCurrent(QSurface*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #14 0x00007f451024ea5e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #15 0x00007f451024faa5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #16 0x00007f45157a5625 in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #17 0x00007f45102c78c5 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #18 0x00007f44d974565b in PlasmaQuick::Dialog::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5 #19 0x00007f4515f40acc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #20 0x00007f4515f48417 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #21 0x00007f45152003c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #22 0x00007f451579a28d in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #23 0x00007f451579aebd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #24 0x00007f45157748fb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #25 0x00007f44fec534b6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #26 0x00007f45151fe64a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #27 0x00007f4515207854 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #28 0x00007f45180e81f9 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so #29 0x00007f4517d35830 in __libc_start_main (main=0x4006b0, argc=1, argv=0x7ffed4e8f868, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffed4e8f858) at ../csu/libc-start.c:291 #30 0x00000000004006e9 in _start () > So far, only using patch 2/2, i haven't seen any new freezes, but > looking at the debug output i get a lot of these when alt-tabbing: > > INIT: wxh = 264 x 1062, drawable 54662577 eid 54662586 > QXcbConnection: XCB error: 3 (BadWindow), sequence: 13890, resource > id: 54662577, major code: 20 (GetProperty), minor code: 0 > QXcbConnection: XCB error: 3 (BadWindow), sequence: 13902, resource > id: 54662577, major code: 20 (GetProperty), minor code: 0 > FINI: wxh = 264 x 1062, drawable 54662577 eid 54662586 recv_sbc 3, > send_sbc 4 PENDING 1 > INIT: wxh = 264 x 1062, drawable 54662633 eid 54662644 > QXcbConnection: XCB error: 3 (BadWindow), sequence: 14502, resource > id: 54662633, major code: 20 (GetProperty), minor code: 0 > QXcbConnection: XCB error: 3 (BadWindow), sequence: 14514, resource > id: 54662633, major code: 20 (GetProperty), minor code: 0 > FINI: wxh = 264 x 1062, drawable 54662633 eid 54662644 recv_sbc 2, > send_sbc 3 PENDING 1 I haven't tested patch 2/2 yet, but the XCB errors are probably unrelated. I get saw in KWin's Tabbox and Plasmashell task manager thumbnails already for a long time (> 1 year). Just spams the log, but we hadn't see any real problems as a result. > Curiously my display is only 1050 pixels high, that window looks higher. > > Anyway, would be good to know if patch 1/1 replaces a high frequency > of lockups of plasmashell by a low frequency of lockups of kwin_x11 if > you notice something like that. > > Ideally one of the more experienced Mesa developers would find a > better solution than one of these patches, at least long-term. > > thanks, > -mario _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
