problem with the framebuffer on an ARM device

[ilpaso]

Hi all,
I installed Qt Embedded on a ARM device.
There is a problem with the framebuffer.
Running a simple application (./application -qws) it returns:


Cannot create semaphore /tmp/qtembedded-0/QtEmbedded-0 'd'
Error 38 Function not implemented
Cannot get display lock
Aborted

but when I try to run the framebuffer example application it returns



The framebuffer device was opened successfully.

Fixed screen info:
id: imapfb
smem_start: 0x44800000
smem_len: 4718592
type: 0
type_aux: 0
visual: 2
xpanstep: 0
ypanstep: 1
ywrapstep: 0
line_length: 2048
mmio_start: 0x20cd0000
mmio_len: 16384
accel: 0

The framebuffer device was mapped to memory successfully.

Successfully switched to graphics mode.

Variable screen info:
xres: 1024
yres: 576
xres_virtual: 1024
yres_virtual: 1152
yoffset: 0
xoffset: 0
bits_per_pixel: 16
grayscale: 0
red: offset: 11, length: 5, msb_right: 0
green: offset: 5, length: 6, msb_right: 0
blue: offset: 0, length: 5, msb_right: 0
transp: offset: 0, length: 0, msb_right: 0
nonstd: 0
activate: 0
height: 0
width: 0
accel_flags: 0x0
pixclock: 46213560
left_margin: 128
right_margin: 15
upper_margin: 21
lower_margin: 5
hsync_len: 104
vsync_len: 4
sync: 0
vmode: 0

Frame Buffer Performance test...
Average: 39244 usecs
Bandwidth: 114.667 MByte/Sec
Max. FPS: 25.482 fps

Will draw 3 rectangles on the screen,
they should be colored red, green and blue (in that order).
Done.

How can I solve?
I changed the permission to the file /tmp/qtembedded-0/QtEmbedded-0 but it returns a "wrong permissions" error

Thank you in advance

ilpaso