Xpra: Screen for X

http://xpra.org/

by luu • 13 years ago

127 34 13 years ago

xpra.org

dded4• 13 years ago

Is anyone familiar with this? How does it compare with VNC or NX?

kcbanner• 13 years ago

This is different. This is forwarding on the application level, not the entire screen.

angerman2• 13 years ago

Isn't that what NX does as well?

chipaca• 13 years ago

It's a rootles VNC, and has more compression options. Haven't gotten it to work with webp yet, but x264 works very well for me; I usually can't tell if it's local or remote.

TTPrograms• 13 years ago

Why would I use this over ssh -X?

teddyh• 13 years ago

Because xpra is faster.

angerman2• 13 years ago

Sounds like it's faster. And allows to reattach to a certain session.

CJefferson• 13 years ago

The main problem with ssh -X is all your apps close when your connection drops. That is the main reason I always use screen or tmux -- I rarely actually use multiple screens, it just keeps my programs alive.

Piskvorrr• 13 years ago

Here's my use case: I have multiple computers with an X server, but only one which actually has the graphical program(s) which I need to use. So, on the "main computer", I set the DISPLAY to Xpra's :15 instead of the usual :0, launch the program in `screen`, and off I go.

Now wherever I need to use the program(s), I only need to re-attach the Xpra session, and it shows up at the local display. This allows me to keep the same windows open, but I'm taking them with me, wherever I go. Also, the programs keep running when I close the connection (or when it drops), so I don't have to a) start them again, or b) restore state.

More Xpra goodness: allows me to change the compression and algorithm on-the-fly; is more responsible than SSH X forward on slow/laggy connections; has a "connection problem" visual indication (the windows are overlaid with a spinner, instead of just freezing).

blueblob• 13 years ago

Has anyone used both xpra and x2go that could give a comparison?

axx• 13 years ago

You could use this, to launch a remote browser or something, saw it in this article a while ago: http://blog.docker.io/2013/07/docker-desktop-your-desktop-ov...

tvon• 13 years ago

FWIW, if that's all you want you can do it with plain old X11.

dded4• 13 years ago

Yes, X11 itself can display over a network. But it's quite painful over an even somewhat slow link.

pekk• 13 years ago

with no way to detach/reattach or deal with disconnection reasonably

zarkov992• 13 years ago

Last time I tried this there was no support for anti-aliasing which was pretty much a non starter for me. Does anyone know if that has changed?

amtota4• 13 years ago

Not sure what you mean by that, can you clarify? The rendering on the server is done using a regular Xorg server, it will use whatever settings you choose. If you use an xpra lossless mode (or lossless with auto-refresh), then this is exactly what you'll get on the client. Now, if you mean sub-pixel hinting, that's a different story.

zarkov992• 13 years ago

I might mean that. I tried it, thought it was just what I needed except that text looked horrible. I attributed it to lack of aliasing and some quick Googling indicated that it could not be fixed.

jspiros• 13 years ago

I've used xpra for about a year now, and I do recommend it if it seems like it would fill a need in your workflow.

For me, I'm using it primarily as a way to run Pidgin (for Jabber and AIM, primarily) on my server that I can connect to from the various machines I use around the house; analogous to how I use irssi in screen for IRC.

I also configured my screen instance to have a DISPLAY environment variable that corresponds to my Xpra instance, so if I run anything within screen that connects to an X server, I can be sure it's connecting to the X server I'm currently connected to anyway, and I'm mostly safe from sudden disconnection problems.

dllthomas2• 13 years ago

I presume you're familiar with Finch (the console-based Pidgin equivalent - still uses libpurple), but I figured I'd mention it as another good way to get jabber/aim remotely.

notastartup• 13 years ago

is there an html5 canvas client with this? displaying the X screen to the browser and taking inputs.

glittershark• 13 years ago

Sounds like someone's volunteering to go write one

riskable• 13 years ago

This is kind of what I'm working on in Gate One right now. Google "gate one x11" to see a video of the alpha.

amtota4• 13 years ago

There is a proof of concept which you can try: https://www.xpra.org/trac/ticket/473

shiven• 13 years ago

How is this better than VirtualGL ? I frequently use vglconnect and vglrun to XForward OpenGL applications. Anyone know if this does anything better?

mkl• 13 years ago

I'm not familiar with VirtualGL so correct me if I'm wrong, but it doesn't look like it supports reattaching to a still-running program after detaching or getting disconnected, which is the main purpose/advantage of xpra.

dded4• 13 years ago

While we're on the topic of X displayers, is there something like this or VNC for ChromeOS?

Xpra: Screen for X

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