Christoper, I reviewed my syslog concerning all Kernel-->ACPI logs via: cat /var/log/syslog | grep kernel | grep ACPI I have 2 questions and hope you can help me understand: 1. ACPI loaded the 8 SSDT tables. I assume these equate to the ssdt1.dat to ssdt8.dat files obtained from acpidump. However, ssdt9.dat to ssdt12.dat were not shown to be loaded. Why did it not report 4 table load failures but 1 in the ACPI Error? Below are the relevant tables reported in my syslogs? May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: Early table checksum verification disabled May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: RSDP 0x00000000CDD39000 000024 (v02 ALASKA) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: XSDT 0x00000000CDD390A0 0000BC (v01 ALASKA A M I 01072009 AMI 00010013) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: FACP 0x00000000CDD5CB78 00010C (v05 ALASKA A M I 01072009 AMI 00010013) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: DSDT 0x00000000CDD391F8 02397B (v02 ALASKA A M I 01072009 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: FACS 0x00000000D751BF80 000040 May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: APIC 0x00000000CDD5CC88 0000BC (v03 ALASKA A M I 01072009 AMI 00010013) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: FPDT 0x00000000CDD5CD48 000044 (v01 ALASKA A M I 01072009 AMI 00010013) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: FIDT 0x00000000CDD5CD90 00009C (v01 ALASKA A M I 01072009 AMI 00010013) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: MCFG 0x00000000CDD5CE30 00003C (v01 ALASKA A M I 01072009 MSFT 00000097) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: HPET 0x00000000CDD5CE70 000038 (v01 ALASKA A M I 01072009 AMI. 0005000B) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD5CEA8 00036D (v01 SataRe SataTabl 00001000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: LPIT 0x00000000CDD5D218 000094 (v01 INTEL SKL 00000000 MSFT 0000005F) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD5D2B0 000248 (v02 INTEL sensrhub 00000000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD5D4F8 002BAE (v02 INTEL PtidDevc 00001000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD600A8 000BE3 (v02 INTEL Ther_Rvp 00001000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD60C90 0004A3 (v02 INTEL zpodd 00001000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: DBGP 0x00000000CDD61138 000034 (v01 INTEL 00000000 MSFT 0000005F) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: DBG2 0x00000000CDD61170 000054 (v00 INTEL 00000000 MSFT 0000005F) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD611C8 000705 (v02 INTEL xh_rvp08 00000000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD618D0 005359 (v02 SaSsdt SaSsdt 00003000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: UEFI 0x00000000CDD66C30 000042 (v01 00000000 00000000) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: SSDT 0x00000000CDD66C78 000E73 (v02 CpuRef CpuSsdt 00003000 INTL 20120913) May 23 09:35:47 Eliot kernel: [ 0.000000] ACPI: BGRT 0x00000000CDD67B48 000038 (v01 ALASKA A M I 01072009 AMI 00010013) 2. The ACPI Error concerning \_SB_.PCI0.XHC_.RHUB.HS11 Namespace lookup failure said dswload is affected. I understand dsw to mean "Device Sleep Wake". Does this mean the Namespace lookup failure caused the following pci device System wakeup to be disabled? May 23 10:43:10 Eliot kernel: [ 0.183971] pci 0000:00:01.0: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.184348] pci 0000:00:14.0: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.184828] pci 0000:00:1b.0: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.184979] pci 0000:00:1c.0: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.185130] pci 0000:00:1d.0: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.185618] pci 0000:00:1f.3: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.186086] pci 0000:00:1f.6: System wakeup disabled by ACPI May 23 10:43:10 Eliot kernel: [ 0.186230] pci 0000:01:00.0: System wakeup disabled by ACPI Based on lspci, these device appears to be: 00:01.0 PCI bridge: Intel Corporation Sky Lake PCIe Controller (x16) (rev 07) 00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31) 00:1b.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Root Port #17 (rev f1) 00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1) 00:1d.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #9 (rev f1) 00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev 31) 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V (rev 31) 01:00.0 VGA compatible controller: NVIDIA Corporation GK110 [GeForce GTX TITAN] (rev a1) However, when I run commands $ acpitool -w, I see the S-state of USB and Ethernet controller enabled while the S-state of the other PCI devices disabled. What is the relations? Device S-state Status Sysfs node --------------------------------------- 1. PEG0 S4 *disabled pci:0000:00:01.0 2. PEGP S4 *disabled pci:0000:01:00.0 3. PEG1 S4 *disabled 4. PEGP S4 *disabled 5. PEG2 S4 *disabled 6. PEGP S4 *disabled 7. UAR1 S4 *disabled pnp:00:02 8. PS2K S3 *disabled 9. PS2M S3 *disabled 10. RP09 S4 *disabled pci:0000:00:1d.0 11. PXSX S4 *disabled 12. RP10 S4 *disabled 13. PXSX S4 *disabled 14. RP11 S4 *disabled 15. PXSX S4 *disabled 16. RP12 S4 *disabled 17. PXSX S4 *disabled 18. RP13 S4 *disabled 19. PXSX S4 *disabled 20. RP01 S4 *disabled pci:0000:00:1c.0 21. PXSX S4 *disabled 22. RP02 S4 *disabled 23. PXSX S4 *disabled 24. RP03 S4 *disabled 25. PXSX S4 *disabled 26. RP04 S4 *disabled 27. PXSX S4 *disabled 28. RP05 S4 *disabled 29. PXSX S4 *disabled 30. RP06 S4 *disabled 31. PXSX S4 *disabled 32. RP07 S4 *disabled 33. PXSX S4 *disabled 34. RP08 S4 *disabled 35. PXSX S4 *disabled 36. RP17 S4 *disabled pci:0000:00:1b.0 37. PXSX S4 *disabled 38. RP18 S4 *disabled 39. PXSX S4 *disabled 40. RP19 S4 *disabled 41. PXSX S4 *disabled 42. RP20 S4 *disabled 43. PXSX S4 *disabled 44. RP14 S4 *disabled 45. PXSX S4 *disabled 46. RP15 S4 *disabled 47. PXSX S4 *disabled 48. RP16 S4 *disabled 49. PXSX S4 *disabled 50. GLAN S4 *enabled pci:0000:00:1f.6 51. XHC S4 *enabled pci:0000:00:14.0 52. XDCI S4 *disabled 53. HDAS S4 *disabled pci:0000:00:1f.3 Appreciate your advice.