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[Roman <1477690@xxxxxxxxxxxxxxxxxx>]

On this self compiled kernel from the ath tree, i reverted the only
commit regarding this topic:

diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 92d6cdf..0dfb5d1 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -1019,7 +1019,6 @@ static int i2c_hid_probe(struct i2c_client *client,
 	hid->driver_data = client;
 	hid->ll_driver = &i2c_hid_ll_driver;
 	hid->dev.parent = &client->dev;
-	ACPI_COMPANION_SET(&hid->dev, ACPI_COMPANION(&client->dev));
 	hid->bus = BUS_I2C;
 	hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
 	hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);

But the Touchpad still doesnt work.

** Attachment added: "Touchpadtest 4.2.0-rc3-wl-ath.txt"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1477690/+attachment/4433195/+files/Touchpadtest%204.2.0-rc3-wl-ath.txt

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https://bugs.launchpad.net/bugs/1477690

Title:
  SYN1B7F:00 06CB:2970 UNKNOWN does not work with Kernel 4.2.x anymore

Status in linux package in Ubuntu:
  New

Bug description:
  The Touchpad of my Acer VN7-571G doesn't work under the mainline
  Kernel anymore.

  I: Bus=0018 Vendor=06cb Product=2970 Version=0100
  N: Name="SYN1B7F:00 06CB:2970 UNKNOWN"
  P: Phys=
  S: Sysfs=/devices/pci0000:00/INT3433:00/i2c-0/i2c-SYN1B7F:00/0018:06CB:2970.0001/input/input7
  U: Uniq=
  H: Handlers=mouse0 event7 

  There were always some errors in dmesg, but the touchpad worked nice. Booting with the new mainline Kernels, it crashes.
  I attach some reports of a self written test for a variety of Kernels.
  The test contains the output of:

  dmesg | grep i2c
  dmesg | grep hid
  xinput

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