Re: [PATCH 4/5] platform/x86: x86-android-tablets: Workaround Lenovo Yoga Tablet 2 830/1050 poweroff hang

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>]

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)?
Perhaps we need to enforce it based on a quirk?

-- 
With Best Regards,
Andy Shevchenko