Re: is the bad performance because of backend and how could I change backend?

[Fred Kiefer]

The problem with the xlib backend you are experiencing is most likely
due to it being of a different version than the gui library you
installed from the Debian repository. According to your mail the xlib
backend is version 0.16, which version are the other two backends you
have installed?

The slowness you describe doesn't seem widget related to me. It looks
rather like interprocess communication, especially with the X server is
slow on your machine. (OK point 5. of your list may be different)
If this is correct a different backend wont change anything, as they all
have a very similar way to interface with X.

Fred

Zhang Weiwu wrote:
> Hello
> 
> I managed to get back to use debian-repository version of gnustep
> instead of compiling my own version, and suffer greatly from several
> problems:
> 
>    1. drag and drop almost never works. It freezes the application where
>       drag-drop occur for some time, and sometimes totally freeze the
>       application
>    2. middle click paste doesn't always work.
>    3. clicking a window behind another doesn't bring the window to the
>       top, sometimes (30%);
>    4. double click to application icon doesn't always bring its window
>       to the front.
>    5. the UI being slow
> 
> I suspect these things are widget backend related. I could be totally
> wrong thanks to being a total newbie, but I sense it that way. I tried
> to replace default arts backend to cairo, which gets worse result by
> placing text at wrong positions. There are only two backends provided by
> debian repository.
> 
> My question is is it possible to just compile one backend with xlibs
> myself and configure debian official gnustep to use that backend?
> 
> I guess if I can compile my own backend I should be able to configure
> gnustep to use it by
> defaults write NSGlobalDomain GSBackend libgnustep-xlib
> 
> Although I can successfully compile and install the backend, and
> configure GNUStep to use that backend, I could not run application with
> the backend.
> 
> loongson@cruella:~$ Terminal 
> 2009-05-03 01:22:41.377 Terminal[8424] Did not find correct version of 
> backend, falling back to std.
> 2009-05-03 01:22:41.396 Terminal[8424] NSApplication.m:285  Assertion failed 
> in initialize_gnustep_backend.  Unable to find backend libgnustep-xlib
> 已放弃
> 
> 
> It seems gnustep isn't aware of the existence of the backend, not even
> if I moved libgnustep-xlib-0.16.bundle from
> /usr/local/lib/GNUstep/Bundles to /usr/lib/GNUstep/Bundles.
> 
> What would you suggest me to do in this case?
> 
> Note that my computer is a bit special, a tightly integrated computer
> with mips CPU. I cannot replace or add display card or opengl just for
> cairo.
> 
> Thanks a lot in advance!