Suspend/Hibernate with nvidia [m/b] chipsets in Jessie

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Suspend/Hibernate with nvidia [m/b] chipsets in Jessie

Postby PeterB » 2015-05-02 14:31

The change of kernel from Wheezy to Jessie introduces this WILL_NOT_FIX {sic} kernel regression, that for users of some nvidia chipset motherboards can break suspend & hibernate. Please note, this has nothing to do with nvidia graphics cards!

Its claimed to be an nvidia bug, but kernels prior to 3.3 were unaffected. Happily comment 20 in the thread contains a simple workaround.

If the command
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lspci | grep MCP5

returns some output then you may well be affected. Aaron's fix is as follows;-

Create a file (name is unimportant I think, I called mine 50-async.rules), and place it in /etc/udev/rules.d/
The contents should be-

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ACTION=="add", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_target", ATTR{power/async}="disabled"

A blank line at the end of the file is probably a good idea.

Resuming from a suspend/hibernate with USB devices attached may also fail with these motherboards. Possible fix is this udev rule;-
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ACTION=="add", SUBSYSTEM=="usb", TEST=="power/control", ATTR{power/control}="on"

Apply as the async rule above. I called mine 55-usbcore.rules

Hope this helps someone, it took me many hours of searching to find these fixes.

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