Lucio Chiappetti <[EMAIL PROTECTED]> 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
>
> (2) a small application of mine (Fortran wrapped around C Xlib calls)
> has a similar behaviour (on Alpha it did work). Windows are created
> with
>
> flag=CWBitGravity|CWWinGravity|CWBackingStore;
> XChangeWindowAttributes(dpy,win,flag,&attrib);
>
> (3) the Hessling editor (the) in Xcurses mode sometimes presents a
> problem (when I do a large mouse cut-an-paste it hangs, and then if I
> obscure part of the edit window it remains white and deprived of
> textual content).
>
> This behaviour occurred also (more frequently) on Alpha and is
> possibly unrelated with the other two (looks more an overflow of
> the clipboard)
>
> Anyhow xthe windows return to xwininfo
>
> Backing Store State: NotUseful
> Save Under State: no
>
> which is also what xterm or rxvt do (and they work)
>
> Now I wonder whether this has anything to do with fvwm or with the X
> server. I tried adding this to my .fvwmrc, but with no effect
>
> Style * BackingStore
> Style * SaveUnder
>
> I have no idea of how to check whether backing store is enabled in the X
> server. It looks like the server runs as
Check this way:
xdpyinfo | grep back
options: backing-store NO, save-unders NO
The last time I tried running with it on,
everything seemed to slow down.
To turn it on, it your Xorg.conf file add to the Device
section:
Option "BackingStore" "True"
Option "SaveUnders" "True"
> /usr/X11R6/bin/X -nolisten tcp -br vt7 -auth blabla
>
> but some of those options are undocumented in the X man page (and it does
> not mention backing store).
It should be documented in 'man xorg.conf' but I don't see it there.
--
Dan Espen E-mail: [EMAIL PROTECTED]
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