Archive:Getting Started/Run/Nested Session/en

Nested KDE 4 Session

Nested

Instead of using a full-blown new X session for developing software you can use Xephyr to run your development build of KDE 4 in a session parallel to your normal working session.

You can also do this with xnest, but as xnest cannot handle extensions like Render many people prefer Xephyr.

Note

In some cases Xephyr/xnest will make the keyboard work incorrectly because of bug:19365. The workaround is to run KDE on a standalone X as described below.

Assuming you setup your build environment following the instructions in Getting_Started/Build/Environment, simply put the following script in ~/kde/src/run_kde_nested.

#!/bin/bash
Xephyr :1 -screen 1024x768 &
sleep 3
export DISPLAY=:1
dbus-launch $KDEDIR/bin/startkde

Make this file executable. Entering the ~/kde/src directory should set up the required environment variables, so do that before running the script.

You can also use Xephyr with KDM via the Xdmcp protocol and simply a new KDE 4 session to KDM.

On Kubuntu, you can enable it by changing

[Xdmcp]
# Whether KDM should listen to incoming XDMCP requests.
# Default is true
Enable=false

in /etc/kde3/kdm/kdmrc to

[Xdmcp]
# Whether KDM should listen to incoming XDMCP requests.
# Default is true
Enable=true

Adjust your /etc/kde3/kdm/Xaccess to allow your local machine access. Additionally you should make sure to set up a port blocking policy on all external interfaces for the Xdmcp port if you are doing this on a laptop or a PC in an untrusted environment.

If you are done, simply launch Xephyr:

Xephyr -query localhost :1 -host-cursor -screen 1024x768&

where -host-cursor tries to reuse the host's cursor and -screen sets the screen dimensions.

Note

If you get lots of refused connection errors, you might want to use the -ac option of Xephyr. When I tried to launch an application into the Xephyr instance, but I received 3-4 "No protocol specified", after finally saying "could not connect to X Server :1". The below code fixed it for me. It only happens when I am crossing users though, as opposed to doing it all in my main user.

Xephyr -ac :1&

Another option to try if you get lots of refused connection errors is you may need to grant access to your kde-devel user to your X server. Do that using:

xhost +local:kde-devel

If you do not have Xephyr, you can also use Xnest:

Xnest -ac :1& export DISPLAY=:1

---

You may run into this error:

Call to lnusertemp failed (temporary directories full?)
  Check your installation."

If so, try this:

mkdir /var/tmp/kde-devel-kde4

The above code assumes you work with user kde-devel.

---

Researchers Nurture Innovative Biofuel Crops in Israels Desert

Fears of global warming and its impact on our environment have left scientists scrambling to decrease levels of atmospheric carbon we humans produce. Now, Tel Aviv University researchers are doing their part to reduce humanitys carbon footprint by successfully growing forests in the most unlikely place deep in Israels Aravah Desert.

[Researchers Nurture Innovative Biofuel Crops in Israels Desert]

[GoodvilleNews.com - good, positive news, inspirational stories, articles]

Not Your Usual Panhandler

Doug Eaton wanted to celebrate his birthday on June 11 in a big way, so he turned to his friends for ideas -- ended up marking the day with random acts of kindness, including handing out free money to people passing by.

[Not Your Usual Panhandler]

[GoodvilleNews.com - good, positive news, inspirational stories, articles]

An Incredible Graduation Gift from Dad

Brenna Martins dad evidently doesnt like last-minute shopping. Bryan Martin a purchased a gift for his daughters high school graduation -- which happened earlier this month -- thirteen years ago. He managed to keep it hidden this whole time, and his "moving, touching, nostalgic, and thoughtful" present (her words) brought Brenna to tears when dad finally gave it to her last week.

[An Incredible Graduation Gift from Dad]

[GoodvilleNews.com - good, positive news, inspirational stories, articles]

Journey to the End of the Earth

I realized quickly, after just having traveled to various villages in rural India, that distance is relative. Hailing from a city like San Francisco, going even a few hours outside of town is far but twelve hours outside of a major city? I half expected to run into another country.

[Journey to the End of the Earth]

[GoodvilleNews.com - good, positive news, inspirational stories, articles]

Paths Are Made By Walking

2012s Baccalaureate speaker at the University of Pennsylvania was an unconventional choice for an Ivy League school. To address their newly-minted graduates, aspiring to dazzling careers, they picked a man who has never in his adult life, applied for a job. A man who hasnt worked for pay in nearly a decade, and whose self-stated mission is simply "to bring smiles to the world and stillness to my heart".

[Paths Are Made By Walking]

[GoodvilleNews.com - good, positive news, inspirational stories, articles]