Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sat, 01 Mar 2014 18:07:18 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop |
| |
On 03/01/2014 05:47 PM, Li, Aubrey wrote: > > Since we are not able to make things worse, let's make it better. So > Let's dig into this. For the machine hangs by CF9, it's known to work by > KBD, right? For the machine hangs by BIOS, do you know which method will > make reboot work? >
No.
> The answer will determine the sequence of the list. If BIOS hangs but > either of ACPI/KBD/EFI/CF9 works, BIOS is behind of those ways. If BIOS > hangs, no any other way can make it work. BIOS is still the last way. > > If CF9 hangs while ACPI/KBD hangs as well, and BIOS happened to work(do > we really have one?), the above list still doesn't make things worse, > reboot=b and dmidecode table still work.
We obviously have been over this a number of times, and the sad thing is that we have very limited information. It is more complex than that, even... I believe in some cases KBD works but it is slow, and so takes a while.
-hpa
| ![\](/images/icornerr.gif) |