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Message #156610
[Bug 1535513] Re: Enable suspend function for i2c-hid device in Vivid
Vivid will be dead in the coming days:
http://fridge.ubuntu.com/2016/01/14/ubuntu-15-04-vivid-vervet-reaches-end-of-life-on-february-4-2016/
so its time to dist-upgrade; and check if that issue exist with the
newer version(s)
** Changed in: linux (Ubuntu)
Assignee: Phidias (phidias-chiang) => (unassigned)
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https://bugs.launchpad.net/bugs/1535513
Title:
Enable suspend function for i2c-hid device in Vivid
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
On some platforms the touchpad relies on pinctrl devices to provide GPIO interrupt, but in 3.19.0 pinctrl-cherryview doesn't support suspend well and will lose the config after suspend/resume, then touchpad can't be used.
Also, there is a racing condition in i2c-hid module which makes
touchpad unusable when waking up.
[Fix]
This fix has two parts. First part is to enable the suspend/resume function in pinctrl-cherryview:
commit 9eb457b547cc731bc2fc251bd79891a60c64fc3e
Refs: [HEAD]
Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Date: Thu Dec 4 12:32:50 2014 +0200
pinctrl: cherryview: Save and restore pin configs over system
sleep
The second part is to eliminate the racing condition in i2c-hid:
commit 9a327405014f4ef4cdad67a0686db82b9f23c62c
Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Date: Mon Dec 21 15:26:31 2015 +0200
HID: i2c-hid: Prevent sending reports from racing with device
reset
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References