Please run kdebugdialog and tick everything, then reboot, then try to trigger
the issue and attach the file .xsession-errors from your home directory to this
report.
Also useful logs:
/var/log/kdm.log
/var/logl/Xorg.0.log
If your session remains fully functional after trying to
shutdown/reboot/logout you can simply do that, if not you'll have to
switch to a virtual terminal ALT-shift-f1 and copy the files somewhere
while your session is stuck trying to shutdown. Point being that the
logs get overwritten once you start a new session.
Also a note on comment #3: quite literally you cannot/should not expect
halt to do anything more than halt the system (i.e. stop the CPU from
doing anything). What you probably want to use is shutdown, which brings
down the OS and then stops power supply. for convenience/safety reasons
halt also brings down the OS first but it will not actually stop the
power supply. halt very much directly relates to the fact that most CPUs
have a dedicated instruction to stop them from doing anything, that
instruction is mostly called halt (or a shorter version of it like
'hlt'), and that is actually what is called at the end of the program
called 'halt'. Strictly speaking not every computer can actually
shutdown and/or reboot as those features depend on additional low-level
magic such as ACPI to allow power management control and consequently
allow software to tell the computer to shut down power supply or shut it
down and then fire it up again. With that in mind you almost never want
to use halt but shutdown (even though just about all linux/bsd/whatever
versions will have halt either do exactly what shutdown does or what you
experience on Ubuntu - a OS shutdown combined with halting the CPU).
** Changed in: kde-workspace (Ubuntu)
Status: Confirmed => Incomplete
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Bugs, which is subscribed to kde-workspace in Ubuntu.
https://bugs.launchpad.net/bugs/1000690
Title:
Kubuntu 12.04 doesn't logout/reboot/shutdown
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