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[odie <odie@xxxxxxx>]

My laptop is also affected (Acer e3-111). When I resume from sleep (S3),
my Xorg.0.log says:

[  1204.869] (II) AIGLX: Resuming AIGLX clients after VT switch
[  1204.869] (II) intel(0): switch to mode 1366x768@60.1 on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[  1206.441] (--) synaptics: SYN1B7D:01 06CB:2991 UNKNOWN: touchpad found

Furthermore, I get the following in dmesg:

[ 1191.910761] usb 1-2: reset high-speed USB device number 2 using xhci_hcd
[ 1191.911060] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 1.
[ 1191.911064] usb 1-2: hub failed to enable device, error -22
[ 1192.023049] usb 1-2: reset high-speed USB device number 2 using xhci_hcd
[ 1192.039597] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800773ef720
[ 1192.151154] usb 1-4: reset high-speed USB device number 3 using xhci_hcd
[ 1192.151165] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 2.
[ 1192.151168] usb 1-4: hub failed to enable device, error -229
[ 1192.263026] usb 1-4: reset high-speed USB device number 3 using xhci_hcd
[ 1192.263130] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 2.
[ 1192.263133] usb 1-4: hub failed to enable device, error -22
[ 1192.375037] usb 1-4: reset high-speed USB device number 3 using xhci_hcd
[ 1192.405965] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800773ef9c0
[ 1192.464863] usb 1-2.1: reset full-speed USB device number 5 using xhci_hcd
[ 1192.464991] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 4.
[ 1192.464995] usb 1-2.1: hub failed to enable device, error -22
[ 1192.535293] usb 1-2.1: reset full-speed USB device number 5 using xhci_hcd
[ 1192.535319] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 4.
[ 1192.535322] usb 1-2.1: hub failed to enable device, error -22
[ 1192.607494] usb 1-2.1: reset full-speed USB device number 5 using xhci_hcd
[ 1192.623719] usb 1-2.1: device firmware changed
[ 1192.935923] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 1194.015516] PM: resume of devices complete after 2491.115 msecs
[ 1194.016052] PM: Finishing wakeup.


Ugly workaround for this is to reload the hid_multitouch after resuming:

# sudo rmmod hid_multitouch
# sudo modprobe hid_multitouch

Please let me know if there is more information needed.

-- 
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Packages, which is subscribed to pm-utils in Ubuntu.
https://bugs.launchpad.net/bugs/1393079

Title:
  Touchpad not working after suspend/resume

Status in pm-utils package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 14.10 on an Acer Laptop, model: Aspire E5-571G-941Y
  $ uname -a
  Linux Acer-Aspire-E5-571G 3.16.0-24-generic #32-Ubuntu SMP Tue Oct 28 13:07:32 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  Every time I suspend, the trackpad no longer works when resuming.

  I see several other people have the same issue with the same laptop here:
  http://ubuntuforums.org/showthread.php?t=2250002
  (some people say it's a 14.10 specific problem)

  I realize this report is very poor but please don't hesitate to
  request data / clarifications from me, I'll be happy to help.

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