Re: Help needed: watch up during sid updates/upgrades

[Arthur Marsh <arthur.marsh@internode.on.net>]

Arthur Marsh wrote on 25/10/15 14:40:
> Lisandro Damián Nicanor Pérez Meyer wrote on 23/10/15 07:33:
> > As you might probably now we are currently under the Qtbase 5.5.1
> > transition
> > [tran]. It started yesterday and we are 50% done, so it's not going
> > bad at
> > all.
> >
> > [tran]
> > <https://release.debian.org/transitions/html/qtbase-abi-5-5-1.html>
> >
> > But there's a gotcha: now libqt5gui5 recommends libqt5xcbqpa5. Some
> > people are
> > having problems due to it not being installed. It reflects in the app
> > saying
> > that the xcb plugin is not present.
>
> I've had further problems that persist after downgrading qtbase5-dev to
> 5.4.2+dfsg-9 and associated dependencies resulting in not being able to
> login to a kwin session:
>
> ..xsession-errors:
>
> Xsession: X session started for amarsh04 at Sunday 25 October  14:21:48
> ACDT 2015
> QCoreApplication::arguments: Please instantiate the QApplication object
> first
> QDBusConnection: session D-Bus connection created before
> QCoreApplication. Application may misbehave.
> This application failed to start because it could not find or load the
> Qt platform plugin "xcb".
>
> Available platform plugins are: eglfs, kms, linuxfb, minimal,
> minimalegl, offscreen.
>
> Reinstalling the application may fix this problem.
>
> I'm not sure which application I'm supposed to reinstall.

After upgrading qtbase5-dev to 5.5.1+dfsg-4 and selecting kwin-x11 
4:5.4.2-1+b1 I get:

$ cat .xsession-errors
xprop:  unable to open display '192.168.1.100:0'
Xsession: X session started for amarsh04 at Sunday 25 October  14:48:02 
ACDT 2015
QCoreApplication::arguments: Please instantiate the QApplication object 
first
QDBusConnection: session D-Bus connection created before 
QCoreApplication. Application may misbehave.
QXcbConnection: Failed to initialize XRandr
The X11 connection broke: I/O error (code 1)
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 6 requests (6 known processed) with 0 events remaining.

After switching to kwin-wayland 4:5.4.2-1+b1 I get:

$ cat .xsession-errors
xprop:  unable to open display '192.168.1.100:0'
Xsession: X session started for amarsh04 at Sunday 25 October  14:57:09 
ACDT 2015
QCoreApplication::arguments: Please instantiate the QApplication object 
first
QDBusConnection: session D-Bus connection created before 
QCoreApplication. Application may misbehave.
Qt: failed to retrieve the virtual modifier names from XKB
Qt: failed to retrieve the virtual modifier map from XKB
Qt: couldn't get core keyboard device info
libEGL warning: DRI2: xcb_connect failed
libEGL warning: DRI2: xcb_connect failed
No protocol specified
libEGL warning: DRI2: xcb_connect failed
No protocol specified
libEGL warning: DRI2: xcb_connect failed
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to 
'/tmp/runtime-amarsh04'
The X11 connection broke: I/O error (code 1)
XIO:  fatal IO error 2 (No such file or directory) on X server ":0"
      after 187 requests (187 known processed) with 0 events remaining.

Still stuck as to what to do to restore being able to log into the desktop.

Arthur.