This is still a openSUSE 13.1 system (the reason that it is still not newer is in one keyword: KDE).
Nevertheless there might be people here that can comment on what we experience.
The system being out of support already for a long time, no patches, updates or even new packages are installed already for a long time. One would say that such a system will be as stable as a rock.
But since a few weeks, running KDE, programs refuse to start or start with strange results. After trying all sorts of combinations, two are presented below:
When Firefox runs, Kmail can not be started (bouncing icon and nothing).
When Kmail runs, Firefox will start but present: this tab crashed.
Starting kmail after Firefox (first case) from the terminal:
marian@beneden:~> kmail
Maximum number of clients reachedkbuildsycoca running...
DCOP Cleaning up dead connections.
Maximum number of clients reachedkmail: cannot connect to X server :0
DCOP aborting call from 'anonymous-4515' to 'kmail'
marian@beneden:~>
.
In the second case Firfox has more to tell, but the “Maxiumum number of clients” is prominent.
Checking the process list it shows about 200 konqueror processes:
marian 3489 1 0 14:34 ? 00:00:00 kdeinit4: kdeinit4 Running...
marian 3490 3489 0 14:34 ? 00:00:00 kdeinit4: klauncher [kdeinit] --fd=9
marian 3511 3489 0 14:34 ? 00:00:01 kdeinit4: ksmserver [kdeinit]
marian 3577 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001398079695
marian 3578 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001398082314
marian 3579 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001398964423
marian 3580 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001399137513
marian 3581 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001399301354
marian 3582 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session
............
marian 3866 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001558549890
marian 3867 3489 0 14:34 ? 00:00:00 kdeinit4: konqueror [kdeinit] -session 10c6cadc650001558939845
These konquror processes aren’t there with another user loged in on the same system.
They return immediatly after logout-login for this user “marian”.
It will be clear that other (combinations of) programs will fail on other points. when they try to open one window more then the maxiumum resulting in a confusing number of errors and failures.
To me it seems that these konqueror processes are the root problem. They do not result in any visible window on the desktop. But why do they start?