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From: Alexander Puchmayr <alexander.puchmayr@linznet.at>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] kde-misc/synaptiks crashes immediately [SOLVED]
Date: Mon, 24 Mar 2014 15:47:40 +0100
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Thanks for the reply.
strace showed very detailed the last syscalls before the SIGSEV:
[pid 21801] sendmsg(9, {msg_name(0)=3DNULL,=20
msg_iov(2)=3D[{"l\4\1\1\0\0\0\0\3\0\0\0X\0\0\0\1\1o\0\23\0\0\0/StatusNo=
tifierItem\0\0\0\0\0\2\1s\0\32\0\0\0org.kde.StatusNotifierItem\0\0\0
\0\0\0\3\1s\0\7\0\0\0NewIcon\0", 104}, {"", 0}], msg_controllen=3D0,=20=
msg_flags=3D0}, MSG_NOSIGNAL) =3D 104
[pid 21801] --- SIGSEGV {si_signo=3DSIGSEGV, si_code=3DSEGV_MAPERR, si_=
addr=3D0x8}=20
---
and file descriptor 9 was connected to dbus. Well, but this did not sho=
w WHERE=20
it crashed.
Next try was ltrace, but ltrace cannot be applied on python scripts (no=
ELF).
Finally, I checked the dependencies, and starting with pykde4 seemed to=
be a=20
good idea. Recompiled it with "USE=3Ddebug" and "CXXFLAGS=3D-O2 -g", an=
d voila,=20
synaptiks worked without a problem. Hmmm.=20
So, recompiled pykde with the normal options, and it still worked.
Very strange, since I ran revdep-rebuild and pyhton-updater after the w=
orld=20
upgrade ...=20
Note@self: Maybe updating/re-emerging PyQt4 and pykde4 is worth the tim=
e, even=20
if its not neccessary.
However, it seems to work now.=20
Best regards
=09Alex
Am Samstag, 22. M=E4rz 2014, 17:19:14 schrieb Tom Wijsman:
> On Sat, 22 Mar 2014 16:47:23 +0100
>=20
> Alexander Puchmayr <alexander.puchmayr@linznet.at> wrote:
> > Symptom:
> > Start synaptiks configuration module, get immedeately DrKonqi crash=
> > report (trace attached, likely not much useful since I disabled deb=
ug
> > flags) Start either from kde systemsettings or konsole; the latter
> > gives
> >=20
> > alex@prometheus /datadisk/home/alex $ synaptiks
> > Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 14:
> > reading configurations from ~/.fonts.conf is deprecated.
> > KCrash: Application 'synaptiks' crashing...
> > KCrash: Attempting to start /usr/lib64/kde4/libexec/drkonqi from
> > kdeinit sock_file=3D/homedisk/alex/.kde4/socket-prometheus/kdeinit4=
__0
> > unnamed app(17763): Communication problem with "synaptiks" , it
> > probably crashed.
> > Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Messa=
ge
> > did not receive a reply (timeout by message bus)" "
> >=20
> > Any ideas what could go wrong?
>=20
> The crash would reveal what is wrong; therefore, I suggest you to
> recompile the libraries of those packages with debug flags.
>=20
> See http://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
>=20
> Besides that, you might be able to use strace and/or ltrace (with -f
> parameter; if needed, increase the -s parameter) to see what happens
> under the hood.
>=20
> I'm suspecting you'll find the cause by inspecting both; because as
> the trace mixes in evaluation of a Python script, you might need to u=
se
> strace and/or ltrace to discover which Python script this is.
>=20
> A next step could be to use a debugger on that Python script if the
> trace, strace and/or ltrace are insufficient to reveal the cause.
>=20
> When you have found the cause, can you file the details in a bug at
> https://bugs.gentoo.org such that the maintainers are aware of this?
>=20
> Thank you very much in advance.
--=20
Dipl. Ing. Alexander Puchmayr
Grundbachstra=DFe 36
4060 Leonding, =D6sterreich