It is interesting that my card is Hercules Dynamite DL , but only glint driver works. tseng drivers that are assumed for Hercules cards do not work. The symptom with tseng drivers is the same when trying to shut down machine from KDE.
Thus, it seems to me that actually hardware recognition is not done well and/or there was modification of drivers and actually when trying to shutdown machine from KDE the X server becomes broken and I have problem before actuall start up of shutdown procedure.
Since everything works with VL 5.8 Standard and VL 5.1.2 SOHO, maybe it is needed to trace problem in VL 5.8 SOHO specific differences.
When I do Run command and type: poweroff, choose that command is done by root user and after pressing OK I get teh following:
INIT:Switching to runlevel:0
INIT:Sending processes teh TERM Signal
and machine hangs forever.