'Re: kubuntu plasma 5 login error'

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List:       kde-devel
Subject:    Re: kubuntu plasma 5 login error
From:       Kevin Funk <kfunk () kde ! org>
Date:       2014-12-18 8:15:14
Message-ID: 1468086.RqtDLDiSUN () kerberos
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On Thursday 18 December 2014 05:12:10 anu mittal wrote:
> Okay I will give it a try. Thanks.
> 
> On Thu, Dec 18, 2014, 6:43 AM Aleix Pol <aleixpol@kde.org> wrote:
> > On Wed, Dec 17, 2014 at 7:35 PM, anu mittal <anu22mittal@gmail.com> wrote:
> > > Hi everyone,
> > > I have been using kubuntu plasma 5 via VMware Workstation 9.0 for
> > 
> > porting an
> > 
> > > application to kf5,everything was working perfectly but when i tried
> > 
> > logging
> > 
> > > in kubuntu today via same vmware, after accepting the login password and
> > > loading the system the screen faded and turned blank.
> > > The error message which i got from .xsession-error was:
> > > 
> > > kded5 : org.kde.powerdevil.backlighthelper.brightnessvaluemax failed
> > > list is empty
> > > lock called
> > > 
> > > I would like to know if there any solution for it or should i dual boot
> > 
> > my
> > 
> > > laptops's main memory and try working on kubuntu from there.?
> > > --
> > > Regards,
> > > Anu.
> > > 
> > >>> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to
> > 
> > unsubscribe
> > 
> > >>> <<
> > 
> > Something I've seen doing a plasma 5 kubuntu user today is:
> > - getting the blank screen.
> > - opening a konsole
> > - killall plasmashell
> > - plasmashell
> > 
> > It worked for him, still it seems to be a downstream problem.
> > 
> > Aleix
> > 
> > >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to
> > 
> > unsubscribe <<

Heya, I'm also having issues with Plasma 5 from Kubuntu PPA's packages.

Seems related to this one. After some suspend/resumes cycles it seems that 
something in in the kded+powerdevil integration breaks and I can no longer use 
any Power Management related features.

One issue: Clicking on "Power Management" in system settings just freezes the 
application. Suspending no longer works.

Attaching GDB to kded5 brings the following backtrace, which seems to indicate 
some issue with Polkit, it hangs in 'polkit_authority_check_authorization'. 
Did anyone else see this already and could provide some pointers where to look 
at?

Backtrace attached

Greets

-- 
Kevin Funk | kfunk@kde.org | http://kfunk.org
["backtrace.txt" (backtrace.txt)]

#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f524e4089a9 in g_mutex_lock_slowpath (mutex=mutex@entry=0x7f524e6893e0 \
<allocator+96>) at /build/buildd/glib2.0-2.42.1/./glib/gthread-posix.c:1314 #2  \
0x00007f524e409372 in g_mutex_lock (mutex=mutex@entry=0x7f524e6893e0 <allocator+96>) \
at /build/buildd/glib2.0-2.42.1/./glib/gthread-posix.c:1338 #3  0x00007f524e3e1c2f in \
magazine_cache_pop_magazine (countp=0x1ec1638, ix=9) at \
/build/buildd/glib2.0-2.42.1/./glib/gslice.c:725 #4  thread_memory_magazine1_reload \
(tmem=<optimized out>, ix=9) at /build/buildd/glib2.0-2.42.1/./glib/gslice.c:801 #5  \
g_slice_alloc (mem_size=160) at /build/buildd/glib2.0-2.42.1/./glib/gslice.c:996 #6  \
0x00007f524e4069e9 in tuple_allocate_members (n_members=0x235a318, members=0x235a310, \
type=0x22f32f0) at /build/buildd/glib2.0-2.42.1/./glib/gvarianttypeinfo.c:359 #7  \
tuple_info_new (type=0x22f32f0) at \
/build/buildd/glib2.0-2.42.1/./glib/gvarianttypeinfo.c:665 #8  \
g_variant_type_info_get (type=type@entry=0x22f32f0) at \
/build/buildd/glib2.0-2.42.1/./glib/gvarianttypeinfo.c:761 #9  0x00007f524e3ff729 in \
g_variant_alloc (trusted=1, serialised=0, type=0x22f32f0) at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant-core.c:477 #10 \
g_variant_new_from_children (type=type@entry=0x22f32f0, children=0x22526e0, \
n_children=n_children@entry=5, trusted=trusted@entry=1) at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant-core.c:565 #11 0x00007f524e3fc3f3 in \
g_variant_builder_end (builder=builder@entry=0x7fff1c542f40) at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant.c:3612 #12 0x00007f524e3fdf53 in \
g_variant_valist_new (str=str@entry=0x7fff1c542ff8, app=app@entry=0x7fff1c543020) at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant.c:5083 #13 0x00007f524e3fe2c7 in \
g_variant_new_va (format_string=0x7f52327626d4 "", endptr=0x0, app=0x7fff1c543020) at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant.c:5256 #14 0x00007f524e3fe55a in \
g_variant_new (format_string=0x7f52327626c0 "(@(sa{sv})s@a{ss}us)") at \
/build/buildd/glib2.0-2.42.1/./glib/gvariant.c:5191 #15 0x00007f52327589d1 in \
polkit_authority_check_authorization () from \
/usr/lib/x86_64-linux-gnu/libpolkit-gobject-1.so.0 #16 0x00007f5232759dc1 in \
polkit_authority_check_authorization_sync () from \
/usr/lib/x86_64-linux-gnu/libpolkit-gobject-1.so.0 #17 0x00007f52329756f1 in \
PolkitQt1::Authority::checkAuthorizationSync(QString const&, PolkitQt1::Subject \
const&, QFlags<PolkitQt1::Authority::AuthorizationFlag>) () from \
/usr/lib/x86_64-linux-gnu/libpo lkit-qt5-core-1.so.1
#18 0x00007f5232b8975c in ?? () from \
/usr/lib/x86_64-linux-gnu/qt5/plugins/kauth/backend/kauth_backend_plugin.so #19 \
0x00007f5232b89ded in ?? () from \
/usr/lib/x86_64-linux-gnu/qt5/plugins/kauth/backend/kauth_backend_plugin.so #20 \
0x00007f523a0904b3 in PowerDevilUPowerBackend::brightnessValue (this=0x7fff1c543310, \
type=PowerDevil::BackendInterface::UnknownBrightnessControl) at \
../../daemon/backends/upower/powerdevilupowerback end.cpp:367
#21 0x00007f52397c20f2 in PowerDevil::BackendInterface::brightness (this=0x2114ad0, \
type=PowerDevil::BackendInterface::Screen) at \
../../daemon/powerdevilbackendinterface.cpp:88 #22 0x00007f52397df8f7 in \
PowerDevil::BundledActions::BrightnessControl::brightness (this=<optimized out>) at \
../../daemon/actions/bundled/brightnesscontrol.cpp:162 #23 0x00007f52397dca02 in \
brightness (this=<optimized out>) at brightnesscontroladaptor.cpp:39 #24 \
BrightnessControlAdaptor::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, \
_id=<optimized out>, _a=0x7fff1c543570) at brightnesscontroladaptor.moc:118 #25 \
0x00007f52397dcc03 in BrightnessControlAdaptor::qt_metacall (this=0x21df170, \
_c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7fff1c543570) at \
brightnesscontroladaptor.moc:172

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