Package: $ LANG=C apt policy falkon falkon: Installed: 3.0.0-3 Candidate: 3.0.0-3 Version table: *** 3.0.0-3 500 500 https://deb.debian.org/debian testing/main amd64 Packages 500 https://deb.debian.org/debian unstable/main amd64 Packages 100 /var/lib/dpkg/status Error message: $ falkon -e QObject::connect: invalid null parameter nouveau: kernel rejected pushbuf: Datei oder Verzeichnis nicht gefunden nouveau: ch4: krec 0 pushes 0 bufs 1 relocs 0 nouveau: ch4: buf 00000000 00000002 00000004 00000004 00000000 Guess: Bug occured after qt5 transition from 5.10.1 to 5.11.1
Package: $ LANG=C apt policy falkon falkon: Installed: 3.0.0-3 Candidate: 3.0.0-3 Version table: *** 3.0.0-3 500 500 https://deb.debian.org/debian testing/main amd64 Packages 500 https://deb.debian.org/debian unstable/main amd64 Packages 100 /var/lib/dpkg/status Error message: $ LANG=C falkon -e QObject::connect: invalid null parameter QObject::connect: invalid null parameter qrc:data/thumbnailer.qml:2:1: module "QtWebEngine" is not installed qrc:data/thumbnailer.qml:2:1: module "QtWebEngine" is not installed nouveau: kernel rejected pushbuf: No such file or directory nouveau: ch4: krec 0 pushes 0 bufs 8 relocs 0 nouveau: ch4: buf 00000000 00000002 00000004 00000004 00000000 nouveau: ch4: buf 00000001 00000007 00000002 00000002 00000000 nouveau: ch4: buf 00000002 0000000a 00000002 00000002 00000000 nouveau: ch4: buf 00000003 0000000b 00000002 00000002 00000000 nouveau: ch4: buf 00000004 00000008 00000002 00000002 00000000 nouveau: ch4: buf 00000005 00000006 00000004 00000000 00000004 nouveau: ch4: buf 00000006 0000005f 00000002 00000000 00000002 nouveau: ch4: buf 00000007 00000061 00000002 00000000 00000002 qrc:data/thumbnailer.qml:2:1: module "QtWebEngine" is not installed qrc:data/thumbnailer.qml:2:1: module "QtWebEngine" is not installed Received signal 11 SEGV_MAPERR 000000000008 #0 0x7fc0e641476e <unknown> #1 0x7fc0e6414880 <unknown> #2 0x7fc0e6414eb7 <unknown> #3 0x7fc0e1e8afc0 <unknown> #4 0x7fc0c0980d9c <unknown> #5 0x7fc0c0980fb7 <unknown> #6 0x7fc0c09812b3 <unknown> #7 0x7fc0c06755e0 <unknown> #8 0x7fc0c0675630 <unknown> #9 0x7fc0e45ac13b <unknown> #10 0x7fc0e45ac2a6 <unknown> #11 0x7fc0e25da02b QObject::event() #12 0x7fc0e40e7c6b QWidget::event() #13 0x7fc0e45afe2d QQuickWidget::event() #14 0x7fc0eab47bf0 <unknown> #15 0x7fc0e40a94a1 QApplicationPrivate::notify_helper() #16 0x7fc0e40b0ae0 QApplication::notify() #17 0x7fc0e25b0579 QCoreApplication::notifyInternal2() #18 0x7fc0e2601638 QTimerInfoList::activateTimers() #19 0x7fc0e2601e94 <unknown> #20 0x7fc0e1b59287 g_main_context_dispatch #21 0x7fc0e1b594c0 <unknown> #22 0x7fc0e1b5954c g_main_context_iteration #23 0x7fc0e2602223 QEventDispatcherGlib::processEvents() #24 0x7fc0cef81e51 <unknown> #25 0x7fc0e25af24b QEventLoop::exec() #26 0x7fc0e25b73c2 QCoreApplication::exec() #27 0x564d40f255c6 <unknown> #28 0x7fc0e1e77b17 __libc_start_main #29 0x564d40f258da _start r8: 0000564d4366f3c0 r9: 000000000000007a r10: 0000564d42d04af0 r11: 0000000000000206 r12: 0000564d43576df0 r13: 0000564d42d05230 r14: 0000000000000000 r15: 0000000000000000 di: 0000564d43576dd0 si: 0000564d4343b040 bp: 00000000000009d0 bx: 0000000000000000 dx: 0000000000000000 ax: 00007fc0841abd90 cx: 0000564d4343b040 sp: 00007ffe507c1b30 ip: 00007fc0c0980d9c efl: 0000000000010202 cgf: 002b000000000033 erf: 0000000000000004 trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000008 [end of stack trace] Calling _exit(1). Core file will not be generated. Guess: Bug occured after qt5 transition from 5.10.1 to 5.11.1
QtWebEngine doesn't work with nouveau
(In reply to David Rosca from comment #2) > QtWebEngine doesn't work with nouveau Thank you for the quick reply. For me the question remains, why did falkon launch without problems some days/weeks before? Videocard unchanged, only software updates e.g. qt5 transition
(In reply to thflorek) Did you try this? https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903785
Thanks, indeed package qml-module-qtwebengine was not installed. But falkon still crashes: Error message: $ LANG=C falkon -e QObject::connect: invalid null parameter Received signal 11 SEGV_MAPERR 000000000008 #0 0x7f510ce7e76e <unknown> #1 0x7f510ce7e880 <unknown> #2 0x7f510ce7eeb7 <unknown> #3 0x7f51088f4fc0 <unknown> #4 0x7f50e73e5dbc <unknown> #5 0x7f50e73e5fb7 <unknown> #6 0x7f50e7472f2f <unknown> #7 0x7f50e6a6fef6 <unknown> #8 0x7f50e6a701af <unknown> #9 0x7f50e6a70d40 nouveau_pushbuf_kick #10 0x7f50e7473556 <unknown> #11 0x7f50e704e451 <unknown> #12 0x7f510d7a2254 <unknown> #13 0x7f510d7a1efa <unknown> #14 0x7f510d9b4cb5 <unknown> #15 0x7f510d931214 <unknown> #16 0x7f510d95a5f1 <unknown> #17 0x7f510f4c86f6 <unknown> #18 0x7f510f4d954b <unknown> #19 0x7f510f4dd02b <unknown> #20 0x7f510f4e1d83 <unknown> #21 0x7f510f4e1e3a <unknown> #22 0x7f510f4ccbb6 <unknown> #23 0x7f510ce7f218 <unknown> #24 0x7f510ce9f91a <unknown> #25 0x7f510cea03bf <unknown> #26 0x7f510cea0558 <unknown> #27 0x7f510cea2b21 <unknown> #28 0x7f510cec21fb <unknown> #29 0x7f510cee34f4 <unknown> #30 0x7f510cedef41 <unknown> #31 0x7f51088a5f2a start_thread #32 0x7f51089b6edf clone r8: 00007f50cc099fc0 r9: 00007f50cc000200 r10: 0000000000000000 r11: 0000000000000206 r12: 00007f50cc099de0 r13: 00005617e5c476f0 r14: 0000000000000001 r15: 000000000000002d di: 00007f50cc099fd0 si: 0000000000000000 bp: 00007f50cc099de0 bx: 00007f50cc099de0 dx: 0000000000000000 ax: 00007f50cc099de0 cx: 0000000000000000 sp: 00007f509fffdd10 ip: 00007f50e73e5dbc efl: 0000000000010202 cgf: 002b000000000033 erf: 0000000000000006 trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000008 [end of stack trace] Calling _exit(1). Core file will not be generated.
Try this workaround: QT_XCB_FORCE_SOFTWARE_OPENGL = 1 falkon https://bbs.archlinux.org/viewtopic.php?id=238108
(In reply to trmdi from comment #6) > Try this workaround: QT_XCB_FORCE_SOFTWARE_OPENGL = 1 falkon > https://bbs.archlinux.org/viewtopic.php?id=238108 Thanks for helpful hint and background info. Success, this workaround works here on my Debian sid install with Nvidia card and kernel modesetting! $ inxi -G Graphics: Card-1: NVIDIA GT218 [GeForce 210] driver: nouveau v: kernel Display: x11 server: X.Org 1.20.0 driver: modesetting unloaded: fbdev resolution: 1920x1080~60Hz OpenGL: renderer: NVA8 v: 3.3 Mesa 18.1.5 $ LANG=C dpkg -l *qt5webengine* Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version +++-=====================================================-===================== ii libqt5webengine-data 5.11.1+dfsg-5 ii libqt5webengine5:amd64 5.11.1+dfsg-5 ii libqt5webenginecore5:amd64 5.11.1+dfsg-5 ii libqt5webenginewidgets5:amd64 5.11.1+dfsg-5
*** Bug 406456 has been marked as a duplicate of this bug. ***
*** Bug 409483 has been marked as a duplicate of this bug. ***
*** Bug 467932 has been marked as a duplicate of this bug. ***