Usb-2-vga - Works On Linux, Plug & Play


cosurgi

cosurgi

http://janek.kozicki.pl/
Joined
Jul 30, 2008
Messages
1,098
Location
Gdansk, Poland
Website
janek.kozicki.pl
I need VGA to show latex beamer and openoffice presentations from Pandora on conferences. I did extensive search and I found this one:
http://www.winischhofer.eu/linuxsisusbvga.shtml

Some of them were discontinued, but one of them was still possible to buy, it's from tritton (easy on google), a TRI-UV100 (there are others if you browse their website). I paid 55€ (plus a hefty 20€ for shipping) and received it today. I'm happy to report that it works on my linux laptop, and it was literally plug and play! I only needed to write

Code: 
Driver "sisusb"
in xorg.conf file!

Here's a photo of my laptop connected via USB2VGA:

usb_2_vga_photo.jpg
 
Last edited by a moderator:
'cosurgi' said:
I need VGA to show latex beamer and openoffice presentations from Pandora on conferences. I did extensive search and I found this one:
CODE
http://www.winischhofer.eu/linuxsisusbvga.shtml


Some of them were discontinued, but one of them was still possible to buy, it's from tritton (easy on google), a TRI-UV100 (there are others if you browse their website). I paid 55€ (plus a hefty 20€ for shipping) and received it today. I'm happy to report that it works on my linux laptop, and it was literally plug and play! I only needed to write CODE
Driver "sisusb"
in xorg.conf file!

Here's a photo of my laptop connected via USB2VGA:

CODE
http://cosurgi.googlepages.com/usb_2_vga_photo.jpg
Click to expand...
Are you sure the pandora can handle it specwise? Some of these devices I've seen online demand a certain amount of processing power
 
Last edited by a moderator:
'Kekerot' said:
Are you sure the pandora can handle it specwise? Some of these devices I've seen online demand a certain amount of processing power

CPU usage didn't go over 2% when moving window around. And it was clocking 800Mhz (sempron, energy saving mode).

But there is no OpenGL of course and no XV either on this graphics. Just x11 display driver. Good enough for showing presentations and simple short movies.

EDIT: oops, my mistake - it can peak at 20% CPU usage.
Click to expand...
 
Last edited by a moderator:
'cosurgi' said:
'Kekerot' said:
Are you sure the pandora can handle it specwise? Some of these devices I've seen online demand a certain amount of processing power

CPU usage didn't go over 2% when moving window around. And it was clocking 800Mhz (sempron, energy saving mode).
Click to expand...
But there is no OpenGL of course and no XV either on this graphics. Just x11 display driver. Good enough for showing presentations and simple short movies.


I just read some reviews of this on newegg http://www.newegg.com/Product/Product.aspx...N82E16815118301 and they say it is very choppy. I suppose USB doesn't have the bandwidth to do smooth video. Are you experiencing choppiness?
Click to expand...
 
Last edited by a moderator:
'Kekerot' said:
Are you experiencing choppiness?
Click to expand...
Yes, definitely. When moving window on a screen I can see that it's lagging after mouse a small fraction of a second. Like, I dunno, 100ms - 200ms. I wouldn't use it for some regular work.

but "mplayer -vo x11" plays a movie just fine.

EDIT: to play it fullscreen I must use software scaling (x11 doesn't provide hardware scaling) so I add "-zoom" option to mplayer. Then CPU is 30% used.
 
Last edited by a moderator:
TRI-UV200 has DVI output. It uses exactly the same chipset but has more memory and a different USB ID (this is what tritton technical support told me, after I asked). So it's quite possible that it will work.
 
Last edited by a moderator:
As you probably have seen, it is difficult to compare x86 CPUs to ARM CPUs. Besides USB bandwidth, system bus bandwidth could be a show stopper for us as well. Since you already have a unit it seems, you'll have to be the guinea pig on this one :) .
 
Last edited by a moderator:
'cosurgi' said:
Yes, definitely. When moving window on a screen I can see that it's lagging after mouse a small fraction of a second. Like, I dunno, 100ms - 200ms. I wouldn't use it for some regular work.
Click to expand...
i would venture to guess the choppiness is due to the unaccelerated video blits that the driver provides (again, guessing here). try not to invoke such blits, or invoke them at a lower rate, and see what cpu usage would be then (as i am really curious : )
 
Last edited by a moderator:
Even pretty choppy, that'd be great for portable presentations. I'm curious to see how you do with this.
 
Last edited by a moderator:
'RajTakhar' said:
Which version of Open Office have you got working/will work with Pandora?
The latest one, I guess.... nothing should prevent me from using the latest one.

'darkblu' said:
i would venture to guess the choppiness is due to the unaccelerated video blits that the driver provides (again, guessing here). try not to invoke such blits, or invoke them at a lower rate, and see what cpu usage would be then (as i am really curious : )
hm, I'm not sure how to do this :) I just move a window around or type something or watch... CPU usage & delay is small when typing and biggest when moving a window around. How to invoke more or less blits? ;)

'vputz' said:
Even pretty choppy, that'd be great for portable presentations. I'm curious to see how you do with this.
me too :)

'Gruso' said:
Nice one cosurgi. Look forward to the Pandora tests!

thx :)
Click to expand...
Click to expand...
Click to expand...
Click to expand...
 
Last edited by a moderator:
What are the resolution options? CPU utilization (and performance) are probably determined by the video resolution and the video content.

User reviews of USB-video adapters that I have read suggest that while motion artifact is a problem for something as simple as moving the mouse, playing a single video file (that is, instead of moving around desktop components) performed surprisngly well.

Anyway, I definitely will be interested in seeing how well it performs on the Pandora.
 
'cobaltage' said:
What are the resolution options?

I was using here 1024x768, I've seen that 1600x1200 is possible but I didn't try it, because in most places where I show presentations the projector is 1024x768.
Click to expand...
 
Last edited by a moderator:
'cosurgi' said:
I am not sure how to do this :) I just move a window around or type something or watch... CPU usage & delay is small when typing and biggest when moving a window around. How to invoke more or less blits? ;)
Click to expand...
just do not mouse-drag any windows ; )
 
Last edited by a moderator:
are there any adapters for using a VGA input with a SVideo output?

I see lots of VGA->SVideo (wrong direction) cables for using a PC with a TV, none the correct way though...
 
You must log in or register to reply here.

Similar threads

P
Usb To Vga For Usb Host Cable/break Out Board
Replies
0
Views
696
puppetj
P
cosurgi
  • Locked
What Ram Memory Stick/slot Is Used?
Replies
3
Views
937
Tobriand
Tobriand
hmc
DisplayLink external DVI/VGA display WORKS! Now on to fine tuning it.
3 4 5
Replies
90
Views
26K
Palmiga
Palmiga
J
Just Bought A New External Hdd, Will It Work On Pandora?
Replies
11
Views
2K
mindlord
mindlord
A
Hardware PC USB joystick on Pandora
Replies
2
Views
2K
elw3
elw3
Back
Top