Created attachment 121317 [details] log file SUMMARY falkon crashes on startup OBSERVED RESULT pls find crash information log file attached below
rith, is this bug still reproducible? If so: what are your system settings for application style and for window decorations? Also please see: * bug 408701 – Crash at restore page > Start New Session
From the logfile: Thread 1 (Thread 0x7f03fd508080 (LWP 13050)): [KCrash Handler] #6 0x00007f03fb677e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #7 0x00007f03fb679801 in __GI_abort () at abort.c:79 #8 0x00007f03fb66939a in __assert_fail_base (fmt=0x7f03fb7f07d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f03c55da608 "kref", file=file@entry=0x7f03c55da5f2 "../nouveau/pushbuf.c", line=line@entry=723, function=function@entry=0x7f03c55da740 "nouveau_pushbuf_data") at assert.c:92 #9 0x00007f03fb669412 in __GI___assert_fail (assertion=0x7f03c55da608 "kref", file=0x7f03c55da5f2 "../nouveau/pushbuf.c", line=723, function=0x7f03c55da740 "nouveau_pushbuf_data") at assert.c:101 #10 0x00007f03c55d89ad in () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 #11 0x00007f03c55d8966 in nouveau_pushbuf_data () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 #12 0x00007f03c55d8a3f in () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 #13 0x00007f03c55d8eaf in () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 #14 0x00007f03c55d9a40 in nouveau_pushbuf_kick () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 #15 0x00007f03c9fe3206 in () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #16 0x00007f03ca188ecb in () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #17 0x00007f03c9d06a7a in () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #18 0x00007f03cbc204e8 in () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0 This is a known bug in the nouveau driver and affects all applications using QtWebEngine (and also others that use OpenGL from multiple threads). See e.g.: https://bugs.kde.org/show_bug.cgi?id=368371 https://bugs.kde.org/show_bug.cgi?id=358654 https://bugreports.qt.io/browse/QTBUG-41242 https://gitlab.freedesktop.org/mesa/mesa/issues/1080 A workaround is to disable GPU rendering by setting the environment variable QT_XCB_FORCE_SOFTWARE_OPENGL=1, or (probably better) install the proprietary nvidia driver.
I found an older Falkon bug report about the same problem, so marking this one as duplicate. *** This bug has been marked as a duplicate of bug 397389 ***