Public bug reported: ASPM doesn't work completely on Asus Zenbook UX31 (regression from kernel 3.1 with pcie_aspm=force)
The issue reported at [1] holds true. With 12.04 kernel, the following is seen at the moment: $ sudo lspci -vv | grep ASPM LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk- LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <16us LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk- LnkCap: Port #2, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <16us LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #4, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <16us LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <64us LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, L1 unlimited LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ With two enable-aspm [2] calls, as follows: ROOT_COMPLEX="00:1c.1" ENDPOINT="02:00.0" --- ROOT_COMPLEX="00:1c.3" ENDPOINT="03:00.0" the following is gotten instead and everything continues to function fine: $ sudo lspci -vv | grep ASPM LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk- LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <16us LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk- LnkCap: Port #2, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <16us LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #4, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <16us LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <64us LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+ LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, L1 unlimited LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+ [1] http://ubuntuforums.org/showthread.php?t=1865577&page=130#post11771228 [2] http://bombadil.infradead.org/~mcgrof/scripts/enable-aspm ** Affects: linux (Ubuntu) Importance: Medium Assignee: Colin King (colin-king) Status: In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/962038 Title: ASPM doesn't work completely on Asus Zenbook (regression from 3.1) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/962038/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
