I am affected by this bug as well (Lenovo Yoga 720-15IKB, touchpad not
detected).
I tried the mainline kernel (4.12.1) but I only see "Loading initial
ramdisk ..." and it appears to hang. (removing "quiet" has no effect).
I wanted to try if this diff would fix the problem (hwid from windows device
manager):
```
diff --git a/drivers/input/mouse/elan_i2c_core.c
b/drivers/input/mouse/elan_i2c_core.c
index d5ab9dd..6a8b40f 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -1224,6 +1224,7 @@ static const struct acpi_device_id elan_acpi_id[] = {
{ "ELAN0100", 0 },
{ "ELAN0600", 0 },
{ "ELAN0605", 0 },
+ { "ELAN0651", 0 },
{ "ELAN1000", 0 },
{ }
};
```
But since I can't even boot I cannot verify if it works.
When I install "linux-image-4.8.0-56-generic" using apt-get install, I get the
same error.
If I also (apt-get) install "linux-image-extra-4.8.0-56-generic", it proceeds
to give me a
blank screen before hanging (before the Ubuntu splash screen)
Not quite sure how to proceed troubleshooting this, any ideas?
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https://bugs.launchpad.net/bugs/1700657
Title:
Touchpad not detected in Lenovo X1 Yoga / Yoga 720-15IKB
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