Commit b378549 (ACPI / PM: Do not power manage devices in unknown initial states) added code to force devices without _PSC, but having _PS0 defined in the ACPI namespace, into ACPI power state D0 by executing _PS0 for them. That turned out to break Toshiba P870-303, however, so revert that code.
Unified · Split
| @@ -278,11 +278,13 @@ int acpi_bus_init_power(struct acpi_device *device) · 277 unmodified lines | ||
| 278 | 278 | if (result) |
| 279 | 279 | return result; |
| 280 | 280 | } else if (state == ACPI_STATE_UNKNOWN) { |
| 281 | − /* No power resources and missing _PSC? Try to force D0. */ | |
| 281 | + /* | |
| 282 | + * No power resources and missing _PSC? Cross fingers and make | |
| 283 | + * it D0 in hope that this is what the BIOS put the device into. | |
| 284 | + * [We tried to force D0 here by executing _PS0, but that broke | |
| 285 | + * Toshiba P870-303 in a nasty way.] | |
| 286 | + */ | |
| 282 | 287 | state = ACPI_STATE_D0; |
| 283 | − result = acpi_dev_pm_explicit_set(device, state); | |
| 284 | − if (result) | |
| 285 | − return result; | |
| 286 | 288 | } |
| 287 | 289 | device->power.state = state; |
| 288 | 290 | return 0; |