Re: ELAN1000 not working on Asus Zenbook UX305CA-EHM1

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Fri, Nov 20, 2015 at 09:52:14AM +0100, Benjamin Tissoires wrote:
> Hi Duson,
> 
> A user reported a non working touchpad on his Asus Zenbook UX305CA.
> The touchpad is the ELAN1000 which has been added to v4.3:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1281990
> 
> In the logs, I see:
> 
> [   16.636101] i2c_designware i2c_designware.0:
> i2c_dw_handle_tx_abort: lost arbitration
> [   16.636110] elan_i2c i2c-ELAN1000:00: writing cmd (0x0005) failed: -11
> [   16.636113] elan_i2c i2c-ELAN1000:00: device reset failed: -11
> [   16.636115] elan_i2c i2c-ELAN1000:00: device initialize failed: -11
> 
> I wonder if you could have a look at this and tell us whether the
> touchpad is failing (I mean the driver) or if the i2c bus driver is at
> fault.

The designware controller reports that it lost arbitration, as if there
were 2 masters on the same I2c bus, which is unlikely. I'd be looking
into i2c bus driver first.

Thanks.

-- 
Dmitry