Feature changed by: Joseph Mitzen (duncreg) Feature #312962, revision 7 Title: Include acpi_osi=Linux pcie_aspm=force by default for Grub boot parameters openSUSE Distribution: Unconfirmed Priority Requester: Important Requested by: Roger Luedecke (shadowolf7) Partner organization: openSUSE.org Description: acpi_osi=Linux identifies the OS to the BIOS helping fix power and other issues. pcie_aspm=force fixes power regression issue shown here; http://www.phoronix.com/scan.php?page=article&item=linux_2638_aspm&num=1 Discussion: #1: Bruno Friedmann (bruno_friedmann) (2011-11-12 20:59:37) As GHK answered by email on the mailinglist and you didn't report here the result : would you like to kill 80% of working computers ? Just to save some type of Acer buggy bios. I'm not for. please remove that feature. or at least be kind enough to post the result of the discussion! #2: Jon Nelson (jnelson-suse) (2011-11-12 23:37:57) (reply to #1) Correct. Forcing these params is /wrong/ for the majority of computers out there. Besides, it appears as though a fix for this has just appeared in the last few days. #3: Joseph Mitzen (duncreg) (2011-11-13 01:57:10) (reply to #2) Phoronix's articles lend the impression that the vast majority of boards reporting no support do actually support the feature, in contrast to the claim here to the contrary. They even have a list of several DOZEN motherboards that incorrectly report not supporting ASPM when they do. I don't know where the first commenter's idea this is simply an Acer problem comes from. You are correct that patch(es) have just appeared that seem able to fix this. Hopefully, they'll be backported to OpenSUSE 12.1. #4: Tim Edwards (tk83) (2011-11-14 09:51:40) The mailing list thread discussing it is here: http://lists.opensuse.org/opensuse-factory/2011-11/msg00395.html In short it's not a good idea, and Phoronix is not a reliable source of information compared to the kernel developers. + #5: Joseph Mitzen (duncreg) (2011-11-14 18:35:32) (reply to #4) + To be fair, Phoronix was the one who found that the problem existed, + and then found the source of the problem, not the kernel developers, + through their testing of patch by patch to find the culprit and the + first source of a workaround. The engineer from Red Hat is also the + first person to introduce a potential patch to the problem, which + otherwise went unaddressed through several kernel releases. The mailing + list also has unsupported assertions such as "Only works on some + machines, not others, be careful, it can lock your machine up hard." + which appear to be just a person's opinion, not a verifiable fact. + Phoronix had tests on their benchmarking site openbenchmarking.org and + compiled a list of dozens of motherboards that passed the tests + successfully while still reporting that they did not support aspm. I + beg to differ with you in that empirical facts are more reliable than + assertions on a mailing list. You can check here + http://www.phoronix.com/scan.php?page=news_item&px=OTk4NQ to see a + partial list of *152* motherboards that had at least two different + submissions with a passing test result. + Given all this work Phoronix has put into studying this issue, it seems + unfair to label them as being "unreliable" (for this issue, anyway). -- openSUSE Feature: https://features.opensuse.org/312962