[maemo-developers] [maemo-developers] Using Nokia 770 in vertical mode

[From: Benno Senoner]

Hi Tapani,

Tapani Pälli wrote:

> It is possible to do rotations even hardware accelerated. However the
> current UI does not scale to it well (as seen from screenshot) and
> therefore it is not a supported feature. nchip is using software xrandr
> but you still need to compile kernel since screen updates don't work
> correctly otherwise ... however using software xrandr you will loose a
> bit in performance (additional copy in memory) and quite much in memory
> (~750kb).
>  
>
interesting.
750kb does not seem a big problem especially if you don't plan to start 
other memory consuming apps.

The question is more about speed. What kind of slow down do you think 
one would experience ?
If it's in the order of 20% or so then it's acceptable but if it's more 
twice than slow then I think hardware acceleration would
be definitively needed.

Apart from recompiling the kernel, how do you tell the X server start 
with eg a 90degrees rotation ?
Is that a commandline / config file option or do you need to call some 
X11 function from an X client to rotate the screen ?

> BTW, if people on the list do experiments on this area or have any
> thoughts about resize/rotation, please share them at :
> http://maemo.org/maemowiki/MaemoScalability (ScalabilityBrainStorming).
>  
>
Nice, I will certainly share my findings on the mailing list / wiki if I 
manage to make it work.

>>
>> Another thing I would like to do is having the Xserver on the 770
>> listening on port 6000 (the default x11 port) and use an xhosts
>> file to permit a linux PC to display the output of a X11 app on the
>> nokia. Is that possible or is the Xserver on the 770 not able to
>> support remote connections ?
>>   
>
>
>
> X in 770 is built with '--disable-tcp-transport', so the answer is no.
>  
>
Thanks.
The  question is if the X server can be rebuilt without
--disable-tcp-transport


if yes, what drawbacks /limitations it has, eg if disabling tcp-transport
was only used to save memory/cpu or because the Nokia hardware in 
general has some limitations which
makes it hard/impossible  to use X11 forwarding. (Which I hardly believe).

thanks again for all your infos,

cheers,
Benno


> // Tapani
>
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