OpenGL graphicssystem issue on intel video chipset

Hi all,
I'am using the last version of Qt (4.7.3) on Ubuntu 10.04 machine. The pc has a intel i855GME graphics chipset. When configuring Qt via configure script I give it the option "-graphicssystem opengl" and "-opengl desktop". The configure script report the following lines:

Code:

Build type:    linux-g++
Architecture:  i386
Platform notes:
 
            - Also available for Linux: linux-kcc linux-icc linux-cxx
 
Build .................. libs tools examples demos docs translations
Configuration ..........  release shared dll largefile stl precompile_header mmx 3dnow sse sse2 sse3 ssse3 sse4_1 sse4_2 avx  minimal-config small-config medium-config large-config full-config accessibility opengl reduce_exports ipv6 clock-gettime clock-monotonic mremap getaddrinfo ipv6ifname getifaddrs inotify png freetype zlib nis iconv xshape xsync mitshm xkb xmlpatterns multimedia svg release
Debug .................. no
Qt 3 compatibility ..... no
QtDBus module .......... no
QtConcurrent code ...... yes
QtGui module ........... yes
QtScript module ........ no
QtScriptTools module ... no
QtXmlPatterns module ... yes
Phonon module .......... no
Multimedia module ...... auto
SVG module ............. yes
WebKit module .......... no
Declarative module ..... no
Declarative debugging ...yes
Support for S60 ........ no
Symbian DEF files ...... no
STL support ............ yes
PCH support ............ yes
MMX/3DNOW/SSE/SSE2/SSE3. yes/yes/yes/yes/yes
SSSE3/SSE4.1/SSE4.2..... yes/yes/yes
AVX..................... yes
Graphics System ........ opengl
IPv6 support ........... yes
IPv6 ifname support .... yes
getaddrinfo support .... yes
getifaddrs support ..... yes
Accessibility .......... yes
NIS support ............ yes
CUPS support ........... no
Iconv support .......... yes
Glib support ........... no
GStreamer support ...... no
PulseAudio support ..... no
Large File support ..... yes
GIF support ............ plugin
TIFF support ........... plugin (qt)
JPEG support ........... plugin (qt)
PNG support ............ yes (qt)
MNG support ............ plugin (qt)
zlib support ........... yes
Session management ..... no
OpenGL support ......... yes (Desktop OpenGL)
OpenVG support ......... no
NAS sound support ...... no
XShape support ......... yes
XVideo support ......... no
XSync support .......... yes
Xinerama support ....... no
Xcursor support ........ no
Xfixes support ......... no
Xrandr support ......... no
Xrender support ........ no
Xi support ............. no
MIT-SHM support ........ yes
FontConfig support ..... no
XKB Support ............ yes
immodule support ....... yes
GTK theme support ...... no
OpenSSL support ........ no 
Alsa support ........... no
ICD support ............ no

So I think that openGL support was enabled, but when I run some application the first line in the output is:

Code:

Unable to load graphicssystem "opengl"

Anyone have experience the same problem???