Hello i am running boinc on a server with a ATI RV610 Radeon HD 2400 XT gfx card.
fglrx-driver package is installed.

Can anyone help please?

Hum, without giving us any useful information, we can't help you:

When requesting help on these forums.

Boinc version? OS? Projects attached to? Boinc startup Log? etc, etc, etc.

Most likely it's because you're got an old GPU, that only supports CAL, while most projects have moved onto using OpenCL which your GPU does not support.

Claggy

I apologize for the lack of information given.

OS: 64bit Debian wheezy.
boinc version is boinc 7.2.47+dfsg-3~bpo70+1 from wheezy-backports
projects which support amd are: seti@home, mikyway@home, einstein@home, wolrdcommunitygrid
None of them is giving me gpu WUs

Event log tells me form startup:
Don 24 Jul 2014 21:08:21 CEST | | OpenCL CPU: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 2.0 (sse2), device version OpenCL 1.2 AMD-APP (938.2))
Don 24 Jul 2014 21:08:21 CEST | | No usable GPUs found


So is mine too old, or did i mess up anything else?
How can i check weather my gpu supports OpenCL?

edit: according to
http://boinc.berkeley.edu/wiki/GPU_computing#Check_whether_your_computer_has_a_capable_GPU

my gpu should support it being Radeon HD 2400 XT?

For OpenCL support on AMD/ATI GPUs you need a HD4*** or later GPU, But for HD4*** GPUs there was only ever Beta OpenCL support, and that support has been deprecated in later drivers meaning a HD5*** or later GPU is required for OpenCL support.

Event log tells me form startup:
Don 24 Jul 2014 21:08:21 CEST | | OpenCL CPU: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 2.0 (sse2), device version OpenCL 1.2 AMD-APP (938.2))
Don 24 Jul 2014 21:08:21 CEST | | No usable GPUs found

Your host isn't even detecting a CAL GPU, but your host does detect OpenCL support for the CPU, since AMD/ATI also deprecated CAL support for older GPUs, it could be that you have a too recent driver/APP runtime installed,
it could also mean that that Boinc can't access the GPU, try reading through the Debian/Ubuntu/Mint/Derivatives - GPU recognition fixes thread.

ATI Driver Version Cheat Sheet

AMD has this page showing the current supported GPUs:

MD5 Checksums, System Requirements & Driver Compatibility

You can't find the older SDK's GPU requirements on AMD's site, but this site gives the older GPUs with OpenCL Beta support:

AMD APP SDK 2.6 available for download - first glimpse of OpenCL 1.2 [Update]

Claggy

Your host isn't even detecting a CAL GPU, but your host does detect OpenCL support for the CPU, since AMD/ATI also deprecated CAL support for older GPUs, it could be that you have a too recent driver/APP runtime installed,
it could also mean that that Boinc can't access the GPU, try reading through the Debian/Ubuntu/Mint/Derivatives - GPU recognition fixes thread.

Seems i have to run X to be able to access the gpu?

I seem to have version 12.6 ob the driver.
The cheatsheet speaks of XP? What does that mean?

The cheatsheet speaks of XP? What does that mean?

It was done by a user at Setiathome, where most GPU users were running Windows, some Windows XP,
AMD both deprecated CAL/OpenCL Support for Windows XP, and for CAL/OpenCL support for HD4*** GPUs on other OS's.

Claggy

Ok thank you for explaining, appreciated.

I'm just going to state the obvious and say that their might not be any GPU tasks for the project. The project might not have any, or all of them may have been assigned. I don't know how old or new that specific card is, but I know some graphics cards don't support OpenGL (or maybe it's OpenCL?), so maybe the projects need that and the card doesn't have it.

Tried it on another server with a radeon hd 6350, no WUs either.
Is it possible that one does not get gpu WUs if X is not running?
Catalyst drivers are loaded.