I have this message in syslog and dmesg output:

r8169 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control

Is it a configuration problem or hardware issue?

up vote 8 down vote accepted

r8169 is the name of a module for the Realtek RTL8169 Network Interface Controller which may be included in your /etc/modules file. ASPM stands for Active State Power Management. ASPM enablement can be configured by BIOS or by an OS.

To run the aspm test in the Firmware Test Suite (fwts), open the terminal and run:

sudo apt-get install fwts  
sudo fwts aspm  

This test checks the enablement method in ACPI table and verifies the correctness of the ASPM configuration. Visit the Ubuntu aspm wiki for information about how to evaluate the results of running sudo fwts aspm .

  • Obviously, I didn't disable L0s or L1s. Do you know how can I enable them? – int_ua Nov 7 '13 at 13:11
  • lshw says it's RTL8111/8168/8411 (and I'm lazy to check the box) if that makes any difference. – int_ua Nov 7 '13 at 13:13
  • Yes, it does make a difference. Mine is also RTL8111/8168/8411! Also could you please run sudo lshw -C network, and comment about all the capabilities that appear after where it says: capabilities:. In particular whether it says pm, aspm or both pm and aspm . Also please check in the /etc/modules file, and comment about what are all the kernel modules that it says are loaded at boot time. – karel Nov 7 '13 at 13:36
  • capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation (no aspm). Modules: lp coretemp f71882fg – int_ua Nov 8 '13 at 10:21
  • You have the same RTL8111/8168/8411 and also the same list of network capabilities as my desktop. Since it is a desktop and not a laptop I don't need a power-saving application. However if you want to install a power-saving application on a laptop to increase the battery life, there are answers to that question here on askubuntu. I use laptop-mode-tools from the Ubuntu Software Center on my laptop. TLP from the ppa:linrunner/tlp PPA is said to be stronger, but less stable on some laptop models. – karel Nov 8 '13 at 10:45

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