KDE Panel freezing when HDMI connected

[Anne Wilson]

On Sunday 11 Sep 2011 Tim Edwards wrote:
> On Sunday, September 11, 2011 2:22 PM, "Alex Schuster"
> 
> <wonko at wonkology.org> wrote:
> > Tim Edwards writes:
> > > Saw something interesting in the konsole window - just before the
> > > freeze ups each time there is output from the Pyweather plasma widget
> > > that shows it trying to retrieve weather data from the net. Currently
> > > our cable internet is out so I'm using 3G (USB tethering from the
> > > mobile phone), which in our house is slow and gets an intermittent
> > > signal.
> > > 
> > > My theory is it looks like the Pyweather widget is hanging trying to
> > > get data sometimes, and this in turn hangs plasma-desktop. Which, if
> > > true, is IMHO a huge design fault in plasma-desktop. Anyway I'll see
> > > if this theory holds out, Pyweather's been removed and so far no
> > > freezes.
> > 
> > Yes, that's the problem with plasma-desktoüp, it's single threaded, and
> > if one plasmoid hangs, whole plasma hangs. I often had such trouble when
> > using plasmoids I downloaded fron the net.
> > 
> > I also believe it's a huge design fault, but there _are_ indeed reasons
> > for doing this, having to do with speed mainly I think. I don't find the
> > link right now where this was explained, but if you are interested, I
> > could search and find it.
> 
> I guess there's not much point, the problem solved/design flaw worked
> around by removing plasmoids that are possibly unstable. It does kind of
> limit the usefulness of the whole plasma system though - anything which
> might possibly hang should not be used. This particular machine is a
> netbook so I expect to use it in various places where internet
> connectivity is bad or non-existent.
> 
> It sucks for the users who don't know how to debug technical problems
> and search on mailing lists though - no wonder there's so many posts on
> forums about 'KDE freezing' or 'KDE hanging'.
> 
I wonder if it depends on the design of the specific plasmoid.  I'm not sure 
whether I've used my netbook for a long enough period without connection to 
guarantee it, but I think it's true that my yawp plasmoid simply shows the 
cached information when it can't connect, so I'm guessing that yawp has a 
time-out and pyweather doesn't.

Anne
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