Hi,

I have discovered this problem under QNX 6.3.2 and Photon set in dual display mode.

Dual display is configured from the same two PCI cards handled by the 
devg-radeon.so driver.

System running procnto-smp kernel:
   1) cloning mode (the same picture on both screens):
        - closing "helpviewer" hangs the system,
        - sometimes closing i.e. "psin" hangs the system.

   2) two different screens ("region_x" option used):
        - starting "helpviewer" hangs the system.

While system is running procnto then is little better:
   1) cloning mode / two different screens :
        - starting "helpviewer" works fine,
        - closing "psin" works fine,
        - closing "helpviewer" often hangs the system.

Looks like that "helpviewer" is not prepared for such dual display configuration.

I attached my photon configuration file.

Regards,
Jacek