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Linux 3.17 To Fix Up ASPM, Bring Other PCI Changes

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  • Linux 3.17 To Fix Up ASPM, Bring Other PCI Changes

    Phoronix: Linux 3.17 To Fix Up ASPM, Bring Other PCI Changes

    Bjorn Helgaas, the PCI subsystem maintainer for the Linux kernel, sent in a very early Linux 3.17 kernel merge window pull request due to being on holiday the next few weeks...

    http://www.phoronix.com/vr.php?view=MTc0NzE

  • #2
    Originally posted by phoronix View Post
    Phoronix: Linux 3.17 To Fix Up ASPM, Bring Other PCI Changes

    Bjorn Helgaas, the PCI subsystem maintainer for the Linux kernel, sent in a very early Linux 3.17 kernel merge window pull request due to being on holiday the next few weeks...

    http://www.phoronix.com/vr.php?view=MTc0NzE
    Hello how to make requestes?

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    • #3
      Linux ASPM, Haswell, Intel Chipset series 8 and ACPI FADT boot flags disable

      Remarkable is that Desktop motherboard makers like Asus, ASRock, Gigabyte and MSI, since Intel chipset series 8 all have their BIOS-es set to disable ASPM. The ACPI FADT "ASPM Not supported" boot flag is set for 9 out of 9 tested Intel 8 series chipset mainboards:
      1. ASRock, H81 Pro BTC P1.80, H81: PCIe ASPM Not supported (V4): 0x1
      2. ASRock, H81M-VG4, H81: PCIe ASPM Not supported (V4): 0x1
      3. ASUSTeK, H81M-A, H81: PCIe ASPM Not supported (V4): 0x1
      4. Gigabyte, H81M-H, H81: PCIe ASPM Not supported (V4): 0x1
      5. MSI, H81M-P33 (MS-7817), H81: PCIe ASPM Not supported (V4): 0x1
      6. ASRock, B85M Pro4 P2.10, B85: PCIe ASPM Not supported (V4): 0x1
      7. ASRock, B85M-ITX P2.20, B85: PCIe ASPM Not supported (V4): 0x1
      8. ASUS, Q87T, Q87: PCIe ASPM Not supported (V4): 0x1
      9. ASRock, Z87E-ITX, Z87: PCIe ASPM Not supported (V4): 0x1

      Other remarkable thing is that when enabling ASPM manually on an ASRock H81 Pro BTC, through hardware corresponding setpci commands, all devices support enabling L0s and L1 and there seem no issues: no kernel oops, no lockups, no crashes, no freezes, etcetera.

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      • #4
        I have a new asus laptop thats an intel 8 series, any word, or advice on getting aspm working? really need to fix battery life on this thing, and the boot options don't work

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