WOL in the BIOS causes power ups after shutdown

graysky

In order to support WOL, my Asus H87I-Plus requires an option set in the BIOS (Onboard>APM>Power on by PCIE). When I have this enabled, I can indeed start the machine using the wol magic packet, but there is an undesired side-effect: when I shutdown the machine, it stays shut off for about 5 sec and then turns back on all by itself. If I disable the option in the BIOS, this does not happen... but I am unable to use wol.

Anyone run into this issue before?

niick · Tux's lil' helper Joined: 09 Mar 2006 Posts: 93

I've got the same issue with a Gigabyte Z87X-D3H, had to turn wol off in the bios as well. I'm not sure if it's a kernel/driver issue or a bios one. The computer dual boots with win7 and that doesn't show the same problem.
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graysky · Posted: Mon Feb 03, 2014 11:15 pm Post subject:

Thanks for the reply. Seems to me that if win7 can shutdown cleanly, but Linux cannot that the problem must lie there... what is your init system?
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roarinelk · Guru Joined: 04 Mar 2004 Posts: 520

tons of recent intel motherboards have the same problem (including one of mine). Looks like a BIOS/EFI problem.

graysky · Posted: Tue Feb 04, 2014 9:20 pm Post subject:

Great

The Asus techs with whom I have corresponded barely speak English. Looks like this problem will never get to the people it needs to for a fix.
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Hu · Moderator Joined: 06 Mar 2007 Posts: 21593

If this does affect a significant number of motherboards, there is a good chance that it will soon affect hardware in the possession of a kernel developer or other power user who can assist the kernel developers in pursuing a fix.

niick · Tux's lil' helper Joined: 09 Mar 2006 Posts: 93

graysky · Posted: Wed Feb 26, 2014 7:43 pm Post subject:

Booting into windows 7 and then shutting down from there does not exhibit this behavior. It seems to be something unique to Linux...
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graysky · Posted: Sun Jul 05, 2015 12:34 pm Post subject:

An update: this is a BIOS bug but there is a work-around. I have been testing several systems (Z77 and H97-based) after I disabled all references to 'xHCI' as it pertains to USB settings[1]. I also enabled wake on keyboard[2]. And finally, I disabled EuP 2013 which affects wattage in power off mode. For over 2 months now, I haven't observed an unintentional wake-up with 'wake on PCIe' enabled in the BIOS.

1a. https://communities.intel.com/message/168708
1b. https://github.com/torvalds/linux/commit/0adf7a085fae52b18202a95722fc05d644fa7a42
2. http://serverfault.com/questions/349898/wake-on-lan-with-ubuntu-causing-constant-reboots
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