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Old 04-21-2010, 04:14 PM
Stefan Bader
 
Default Revert "UBUNTU: (pre-stable): input: ALPS - Add signature for HP Pavilion dm3 laptops"

This also has been dropped upstream stable now. Lets wait for when a real
solution comes up.

Chase Douglas wrote:
> This reverts commit d7dc6bc007a098ff0f842549c054002611611f29.
>
> SRU Justification:
>
> Impact: The end result of the commit is loss of scroll support, with no
> extra functionality gained.
>
> How addressed: By reverting the commit, the previously enabled scroll
> support is reestablished through the ImPS/2 extension.
>
> Reproduction: Run current Ubuntu kernel on affected hardware. Scroll
> functionality present in previous Ubuntu releases is now missing.
>
> Regression Potential: Since this is a revert of a one-line device id,
> the regression potential is minimal. The device should fall back to
> ImPS/2 protocol without issue.
>
> -----
>
> The commit added a signature for new ALPS touchpads. Unfortunately, the
> protocol for enabling absolute events appears to have changed for this
> hardware. With this commit, only strict PS/2 events are provided by the
> device, meaning only relative motion events.
>
> By reverting this commit, the ImPS/2 protocol extension is used. The
> extension allows the hardware to provide scroll wheel events itself.
> This behavior is preferred until the proper protocol for this device is
> determined.
>
> The upstream linux-input tree has been reverted at this time, and the
> patch has been NACK'd in the -stable queue.
>
> BugLink: http://bugs.launchpad.net/bugs/550625
>
> Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
> ---
> drivers/input/mouse/alps.c | 1 -
> 1 files changed, 0 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
> index a0671bd..a9f461e 100644
> --- a/drivers/input/mouse/alps.c
> +++ b/drivers/input/mouse/alps.c
> @@ -64,7 +64,6 @@ static const struct alps_model_info alps_model_data[] = {
> { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FW_BK_1 }, /* Dell Vostro 1400 */
> { { 0x52, 0x01, 0x14 }, 0xff, 0xff,
> ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
> - { { 0x73, 0x02, 0x64 }, 0xf8, 0xf8, 0 }, /* HP Pavilion dm3 */
> };
>
> /*


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