https://bugzilla.kernel.org/show_bug.cgi?id=197149
Bug ID: 197149
Summary: ACPI S3 exported despite being disabled in firmware
Product: ACPI
Version: 2.5
Kernel Version: 4.14-rc3+
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Sleep-Wake
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 258739
--> https://bugzilla.kernel.org/attachment.cgi?id=258739&action=edit
`iasl -d` on the copy of `/sys/firmware/acpi/tables/DSDT`
On the ASRock E350M1 with coreboot (with ACPI S3 disabled), Linux claims that
the system supports ACPI S3. `mem` is listed in `/sys/power/state`.
ACPI S3 support should be hidden by the SSFG variable [1].
```
/* S1 support: bit 0, S2 Support: bit 1, etc. S0 & S5 assumed */
#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
Name (SSFG, 0x0D)
#else
Name (SSFG, 0x09)
#endif
```
Please find the disassembled DSDT table, and Linux messages attached.
[1]
https://review.coreboot.org/cgit/coreboot.git/tree/src/southbridge/amd/common/acpi/sleepstates.asl#n18
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