Lucio Chiappetti writes:

> Having recently moved from Alpha to SuSE Linux (using fvwm as window 
> manager, but kdm to start X as default with SuSE [9.2]) I've noticed a 
> funny behaviour in some applications :

> (1) RSI IDL plot windows seems not to have any backing store. When they
>     are obscured I lose the obscured part, when I move them to another
>     dekstop page I lose all.

>     (on Alpha they used to behave like that only after several days the
>     server was running, like it had exhausted backing store memory)

>     NB xwininfo returns
>     Backing Store State:  Always
>     Save Under State: no

I've used IDL on Solaris and Linux, and I always had to tell it to use
it's own backing store by putting "device,retain=2" into its
startup-file.  The documentation says the default is to request the
server to do it, but that doesn't work.  BTW, you have to set it
before you open any IDL-windows.

Don't know if it has anything to do with FVWM, I don't use other
window managers :-)

HTH,
Rainer
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