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

[Dan Chen]

On Sat, Jul 30, 2011 at 11:12, Sharl.Jimh.Tsin <amoiz.shine at gmail.com> wrote:
> hi,all:
>    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?
>    want a reply,thanks~

We can probably work around it by forcing a BIOS reboot through a
quirk entry in arch/x86/kernel/reboot.c. Please file a bug against the
linux source package, and ensure that the contents of
/sys/class/dmi/id/{sys_vendor,product_name} are included in the bug
report.

Cheers,
-Dan