I referred to
and I install ATI Stream SDK 1.4b to my machine (Debian GNU/Linux Lenny amd64).
My machine spec is
CPU: PhenomII 955,
Memory: DDR3-1333 4GByte and
Video: Vipor-X HD4870 2G GDDR5.
"fglrxinfo" says as follows.
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon HD 4800 Series
OpenGL version string: 2.1.8304 Release
But "FindNumDevices" says as follows.
Supported CAL Runtime Version: 1.3.185
Found CAL Runtime Version: 1.3.186
Use -? for help
Finding out number of devices :-
Device Count = 0
CAL shutdown successful.
I can't understand that FindNumDevices say "Device Count = 0". Please teach me how to let FindNumDevices recognize HD4870.