On Thu, Feb 24, 2022 at 05:57:11PM +0100, Hans de Goede wrote: > Hi, > > On 2/23/22 15:58, Andy Shevchenko wrote: > > On Wed, Feb 23, 2022 at 02:31:52PM +0100, Hans de Goede wrote: > >> These tablets' DSDT does not set acpi_gbl_reduced_hardware, so > >> acpi_power_off gets used as pm_power_off handler. This causes "poweroff" > >> on these tablets to hang hard. Requiring pressing the powerbutton for > >> 30 seconds *twice* followed by a normal 3 second press to recover. > >> > >> Avoid this by overriding the global pm_power_off handler to do > >> an EFI poweroff instead. > > > > Oh, you eventually found the root cause (reduced HW bit)? > > I'm not sure, it is possible that not setting the reduced HW bit > is actually correct for this hw, but that does lead to using > acpi_power_off which seems broken on this system. > > I've updated the commit message while merging this to reflect > that using acpi_power_off is the problem, rather then not setting > the reduced HW bit. Understood. Thanks! > Also note that the issue of reboot being the same as poweroff once > the system has been rebooted at least once is still unresolved. -- With Best Regards, Andy Shevchenko
