241 reputation
17
bio website datenwolf.net
location Munich, Germany
age 32
visits member for 3 years, 11 months
seen Nov 19 at 23:30
  • Physicist (German "Diplom" graduation)
  • Computer Science interests:
    • 3D graphics (Online and Offline)
    • signal processing
    • CPU architectures
    • compiler design and implementation
    • networks
    • embedded and realtime systems

Apr
21
answered Cant install Half-life 2 on Ubuntu 14.04
Feb
10
asked What does this Rails Error mean: “Configuration is not a module (TypeError)”
Dec
4
answered Updating NVIDIA
Dec
4
comment Updating NVIDIA
I think those questions are better asked over at superuser
Oct
5
awarded  Commentator
Oct
4
comment Could not display the GUI. This application needs access to an X Server
There's your problem: sudo doesn't hand over the X authentication token, programs started there won't be able to open a connection to the X server. The authentication token usually resides at ${HOME}/.Xauthrority. E.g. it may be /home/foobar/.Xauthority. So open a sudo shell (sudo -s), then therein add the right authority environment (export XAUTHORITY=/home/foobar/.Xauthority), now you should be able to run the installer from within that shell. You must replace /home/foobar with your own home directory of course.
Oct
4
comment Could not display the GUI. This application needs access to an X Server
@user1683628: Now the next question: Do you start SOAPUI under your user session, or as a different user, in a different session (i.e. through su, sudo)?
Oct
4
answered Could not display the GUI. This application needs access to an X Server
Oct
3
awarded  Yearling
Oct
2
answered How can I find which of the extensions of OpenGL that differ from two machines is missing on the second machine?
Jul
21
awarded  Caucus
Jun
26
comment OpenGL Hardware rendering not working on Kubuntu guest on Virtualbox
Your question better fits SuperUser. Voting to close as off-topic.
May
22
comment Transatlantic ping faster than sending a pixel to the screen?
Here's how I measure display latency: Most chipsets provide some GPIO pins, which you can toggle with an outp instruction (your program must run very privileged of course for this to work). Then clone the screen on a digital and a analogue connection. The display goes to digital. Put a photodiode on the display and hook up the analoge video and the photodiode to an oscilloscope, and the scope's external trigger to the GPIO. Now you can use the GPIO for triggerin and accurately measure the time it takes for the signal to appear on the line and the display.
Mar
28
comment Forwarding X through 2 servers (4 boxes involved)
This surprises me a bit, since SSH is rolling it's own xauth implementation.
Mar
28
comment Forwarding X through 2 servers (4 boxes involved)
Did you check /etc/sshd_config for this? Also are all proxies configured for localhost display?
Mar
27
comment Forwarding X through 2 servers (4 boxes involved)
The ssh daemons on the relays are probably not configured for X11 forwarding.
Mar
9
comment How to allow a user to modify settings on one particular network adaptor, while the others may only be changed by an administrator?
@Psycogeek: Yes, I know this. You gave me a correct answer to the wrong question. The non-DAQ NIC may be required to be configured by the user, because there may be no DHCP on site or they're using en.wikipedia.org/wiki/Peg_DHCP So my problem is: One adapter must be user configurable, while the other must be bolted down.
Mar
8
comment How to allow a user to modify settings on one particular network adaptor, while the others may only be changed by an administrator?
If this whole thing was running unter Linux it was more or less trivial for me to implement this: Static configuration for the measurement NIC and the other NIC under the control of NetworkManager, available for configuration by user. But unfortunately the library to talk to the DAQ system is for Windows only.
Mar
8
comment How to allow a user to modify settings on one particular network adaptor, while the others may only be changed by an administrator?
The DAQ software is already to be executed by a unprivileged user. ATM changing NIC settings is only possible with a admin password. Doing this with a timing is a bad idea, because: A) the system will be there only for a few days (the measurements) and B) if the network there is as b0rked as the network at the other research facility I built this for, you will have to make changes to the network on a Day-to-Day base. Seriously, even something simple like PEG-DHCP would be a huge advantage there.
Mar
8
asked How to allow a user to modify settings on one particular network adaptor, while the others may only be changed by an administrator?