Reboot not work on Dell OptiPlex 750 desktop at Ubuntu Natty distro

[Sharl.Jimh.Tsin]

在 2011-07-30六的 13:00 -0400，Felix Miata写道：
> On 2011/07/30 23:12 (GMT+0800) Sharl.Jimh.Tsin composed:
> 
> >       i am using Ubuntu 11.04 Natty on my office's desktop which model is
> > Dell OptiPlex 750 serials.recently i found that the "reboot" function of
> > this OS never worked,it will make the OS hanged and with no response of
> > the keyboard or mouse. only the Power button can kill the program.
> >       So,i just want to know that Is it a BUG of Power Manager or
> > anything else? does someone also face this problem same with me?
> 
> I may have seen this on Optiplex 620 and openSUSE 11.4, but don't remember.
> 
> What is "serials"?

oh,it stands for Nothing.

> Reboot using which reboot method exactly?

i use the reboot button of the Unity Menu on the top-right.

> Try going into the BIOS and adjust power management settings.
> Try the various Grub boot time options to deal with poor compatibility, such 
> as acpi=off, noapic and similar.

tried,but not fix.

> If your Optiplex 750 is one without any PS/2 ports, try the following:
> 
> 1-plug the USB keyboard into the port directly beneath the ethernet port
> 
> 2-install a Dell PS/2 option board, and use a PS/2 keyboard. Other PS/2 
> adapters usually only work in a booted OS, because they are mere USB 
> adapters, not real PS/2 ports, so are useless then BIOS access is required.
> -- 
> "The wise are known for their understanding, and pleasant
> words are persuasive." Proverbs 16:21 (New Living Translation)
> 
>   Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
> 
> Felix Miata  ***  http://fm.no-ip.com/
> 

and thanks for your quickly reply.