I can confirm this behaviour also happens on my acer extensa 5620, using ubuntu 8.04. Versions of ubuntu prior to 8.04 all worked fine.
Some more details -
The problem seems to be irrespective of desktop environment - if I switch using ctrl-alt-f1 to a terminal screen, the delete key still doesn't work. However, running 'xev', and pressing the delete key results in:
KeyPress event, serial 30, synthetic NO, window 0x3000001,
root 0x68, subw 0x0, time 7525668, (507,296), root:(511,345),
state 0x0, keycode 242 (keysym 0x1008ff4b, XF86LaunchB), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 30, synthetic NO, window 0x3000001,
root 0x68, subw 0x0, time 7525668, (507,296), root:(511,345),
state 0x0, keycode 242 (keysym 0x1008ff4b, XF86LaunchB), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
So it seems like the key is registering somehow, but not behaving correctly!
I also tried a "sudo dpkg-reconfigure xserver-xorg", but no change in behaviour.
I can confirm this behaviour also happens on my acer extensa 5620, using ubuntu 8.04. Versions of ubuntu prior to 8.04 all worked fine.
Some more details -
The problem seems to be irrespective of desktop environment - if I switch using ctrl-alt-f1 to a terminal screen, the delete key still doesn't work. However, running 'xev', and pressing the delete key results in:
KeyPress event, serial 30, synthetic NO, window 0x3000001,
root 0x68, subw 0x0, time 7525668, (507,296), root:(511,345),
state 0x0, keycode 242 (keysym 0x1008ff4b, XF86LaunchB), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 30, synthetic NO, window 0x3000001,
root 0x68, subw 0x0, time 7525668, (507,296), root:(511,345),
state 0x0, keycode 242 (keysym 0x1008ff4b, XF86LaunchB), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
So it seems like the key is registering somehow, but not behaving correctly!
I also tried a "sudo dpkg-reconfigure xserver-xorg", but no change in behaviour.