On Fri, Nov 11, 2011 at 05:49:56PM +0000, Daniel Drake wrote:
> We have determined that the jumpiness previously seen when using
> the synaptics kernel mouse driver on OLPC XO was due to not using
> the synaptics X11 userspace driver - the xf86-input-evdev driver was
> interpreting 'finger near pad' signals as movements. Newer versions
> of xf86-input-evdev fix this issue.
>
> Additionally, the synaptics kernel driver is now usable on this
> platform, but only when run in relative mode.
>
> Update the comment and refine the check to allow the synaptics driver
> to run on OLPC XO in relative mode.
>
> We will continue investigating the EC issue as time becomes available.
Signed-off-by please so I can apply.
Thanks.
> ---
> drivers/input/mouse/synaptics.c | 13 +++++--------
> 1 files changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
> index a3bb49c..06c9ee5 100644
> --- a/drivers/input/mouse/synaptics.c
> +++ b/drivers/input/mouse/synaptics.c
> @@ -1389,15 +1389,12 @@ static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
> int err = -1;
>
> /*
> - * The OLPC XO has issues with Synaptics' absolute mode; similarly to
> - * the HGPK, it quickly degrades and the hardware becomes jumpy and
> - * overly sensitive. Not only that, but the constant packet spew
> - * (even at a lowered 40pps rate) overloads the EC such that key
> - * presses on the keyboard are missed. Given all of that, don't
> - * even attempt to use Synaptics mode. Relative mode seems to work
> - * just fine.
> + * The OLPC XO has issues with Synaptics' absolute mode; the constant
> + * packet spew overloads the EC such that key presses on the keyboard
> + * are missed. Given that, don't even attempt to use Absolute mode.
> + * Relative mode seems to work just fine.
> */
> - if (broken_olpc_ec) {
> + if (absolute_mode && broken_olpc_ec) {
> psmouse_info(psmouse,
> "OLPC XO detected, not enabling Synaptics protocol.\n");
> return -ENODEV;
> --
> 1.7.7.1
>
--
Dmitry
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