Originally posted by smitty3268
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The Leading Cause Of The Recent Linux Kernel Power Problems
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Code:max@t410:~$ dmesg | grep -i aspm [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.39-2-amd64 root=UUID=9ff997f7-ee34-433b-b5d9-6123b29fb119 ro quiet pcie_aspm=force [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.39-2-amd64 root=UUID=9ff997f7-ee34-433b-b5d9-6123b29fb119 ro quiet pcie_aspm=force [ 0.000000] PCIe ASPM is forcedly enabled [ 0.509091] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 0.800123] Unable to assume _OSC PCIe control. Disabling ASPM [ 0.811896] Unable to assume _OSC PCIe control. Disabling ASPM max@t410:~$ uname -a Linux t410 2.6.39-2-amd64 #1 SMP Wed Jun 8 11:01:04 UTC 2011 x86_64 GNU/Linux
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2.6.35-28-generic-pae
I'm getting it on a pre 38 kernel:
Code:@ThinkPad-X201:~$ grep -i aspm /var/log/dmesg [ 0.288969] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it @ThinkPad-X201:~$ uname -a Linux ThinkPad-X201 2.6.35-28-generic-pae #50-Ubuntu SMP Fri Mar 18 20:43:15 UTC 2011 i686 GNU/Linux
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ASPM was a major headache on one of the servers we use (randomly failing Intel NICs) so we had to replace the server. Although original server is still not in production various tests (including the one with all different hardware but original motherboard) shown that this is motherboards fault. ASPM was under suspicion almost all the time but no BIOS options, kernel options, etc. changed anything. Until 2.6.38, which suddenly just worked. Not sure if system became fully stable, but difference was huge.
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Originally posted by ahlaht View PostWith pcie_aspm=force I have:
PCIe ASPM is forcedly enabled
ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
I wonder if it's enabled now or not...
The source code revealed "ACPI FADT declares the system doesn't support PCIe
ASPM, so disable it" is always printed on my system even if it's actually enabled.
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Lol, I have an ASUS P6T Deluxe motherboard where the IOMMU (a device for remapping DMA-capable devices such as PCI-E video cards) is completely broken. I get random kernel panics when I have Intel VT-D enabled (VT-D is a prerequisite for the IOMMU). It's pathetic. Motherboard manufacturers don't pay attention to product quality anymore. They just throw shit together, put a bunch of hacks into the Windows driver so that it works semi-decently, and let it go. Even if whole entire features are permanently broken at the hardware level.
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Originally posted by diebels View PostI'm getting it on a pre 38 kernel:
Originally posted by darkbasic View Post[ 0.000000] PCIe ASPM is forcedly enabled
[ 0.229555] ACPI _OSC control for PCIe not granted, disabling ASPM
Is it enabled or not?
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