On Tue, 11 Feb 2020 18:37:53 +0200, Mika Westerberg wrote: > On Tue, Feb 11, 2020 at 05:25:33PM +0100, Jean Delvare wrote: > > On Tue, 11 Feb 2020 15:59:44 +0200, Mika Westerberg wrote: > > > If the default timeout is short then that might happen but I think WDAT > > > spec had some "reasonable" lower limit. > > > > Could you please point me to the WDAT specification? Somehow my web > > search failed to spot it. > > You can find it here: > > http://msdn.microsoft.com/en-us/windows/hardware/gg463320.aspx > > Most of the ACPI related documents not part of the spec itself are > listed in the following page: > > https://uefi.org/acpi Great, thanks for the info. As I read the specification, it is mandatory to have a timeout >= 5 minutes *if* the watchdog is enabled at boot time. Otherwise the 5 minutes is only a recommendation. I wouldn't be surprised if some hardware vendors do not initialize the timeout value and assume the OS will do it for them. Odds are that Windows does that. Thanks again, -- Jean Delvare SUSE L3 Support
