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 | if (result) | 278 | if (result) |
| 279 | return result; | 279 | return result; |
| 280 | } else if (state == ACPI_STATE_UNKNOWN) { | 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 | state = ACPI_STATE_D0; | 287 | state = ACPI_STATE_D0; |
| 283 | result = acpi_dev_pm_explicit_set(device, state); | ||
| 284 | if (result) | ||
| 285 | return result; | ||
| 286 | } | 288 | } |
| 287 | device->power.state = state; | 289 | device->power.state = state; |
| 288 | return 0; | 290 | return 0; |