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Some systems don't support the ACPI_LPS0_ENTRY and ACPI_LPS0_EXIT functions in their Low Power S0 Idle _DSM, but still expect EC events to be processed in the suspend-to-idle state for power button wakeup (among other things) to work. Surface Pro3 turns out to be one of them. Fortunately, it still provides Low Power S0 Idle _DSM with the screen on/off functions supported, so modify the ACPI suspend-to-idle to use the Low Power S0 Idle code path for all systems supporting the ACPI_LPS0_ENTRY and ACPI_LPS0_EXIT or the ACPI_LPS0_SCREEN_OFF and ACPI_LPS0_SCREEN_ON functions in their Low Power S0 Idle _DSM. Potentially, that will cause more systems to use suspend-to-idle by default, so some future corrections may be necessary if it leads to issues, but let it remain more straightforward for now. Link: https://bugzilla.kernel.org/show_bug.cgi?id=198389#add_comment Reported-by: Valentin Manea <valy@mrs.ro> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Valentin Manea <valy@mrs.ro> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.