Thanks all for the suggestions.
Now I'm trying the following workarounds in my school labs:
1) disabled acpid daemon in user space (but /usr/lib/hal/hald-addon-acpi is on)
2) increased repeat keystrokes delay
3) disabled many unuseful sw which overloaded the host
sorry, I know that many different operation in one time doesn't help in
discover the bug... but I'm in a hurry to resolve it.
next days I'll let you know if the problem persists or not.
Thanks all for the suggestions.
Now I'm trying the following workarounds in my school labs:
1) disabled acpid daemon in user space (but /usr/lib/ hal/hald- addon-acpi is on)
2) increased repeat keystrokes delay
3) disabled many unuseful sw which overloaded the host
sorry, I know that many different operation in one time doesn't help in
discover the bug... but I'm in a hurry to resolve it.
next days I'll let you know if the problem persists or not.
bye