Re: QT4 apps slooooow in ssh

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On Tue, May 8, 2012 at 1:10 PM, Roberto Ragusa <mail@xxxxxxxxxxxxxxxx> wrote:
> On 05/08/2012 09:40 PM, T.C. Hollingsworth wrote:
>> On Tue, May 8, 2012 at 8:47 AM, Roberto Ragusa <mail@xxxxxxxxxxxxxxxx> wrote:
>>> An additional test, on the F16 machine:
>>> - "kate" is normally fast
>>> - "ssh -Y localhost kate" is slooooooooooooooooooow
>>> What is happening here????
>> Is `ssh -Y localhost kate -graphicssystem native` faster?
> Absolutely yes! The speed is normal again.
> I also tried "-graphicssystem raster" which is sloooow,
> and "-graphicssystem opengl" which is bugged (pieces of the GUI are
> missing).
> Why is the default so bad for ssh?

The default is the "raster" graphics engine, which works somewhat like
you described in your original e-mail:

The "native" graphics engine uses regular X11, which will probably
always be best over SSH.

Qt also respects the QT_GRAPHICSSYSTEM environment variable to
configure this, so you can add `export QT_GRAPHICSSYSTEM=native` to
your ~/.profile or wherever to make it your "default".

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