ubuntu-x-swat team mailing list archive

[Aielyn <g.oberman@xxxxxxxxxxxxxxxxxx>]

I can confirm that this bug is a problem, and only affects Jaunty, not
Intrepid. My touchpad is an ALPS type touchpad. In an effort to fix it
on my own system, I tried a few things. You can't fix it using xinput,
synclient, xset, or other common terminal commands. I also tried
altering the relevant .fdi files for the HAL.

I tried using an external mouse, and it worked flawlessly, so it's
definitely a problem with the synaptics driver. I tried running Intrepid
through LiveUSB on the same system, and the touchpad works flawlessly
there.

My laptop, which is being affected by this bug, has a 1440x900 screen.
Using "xinput query-state", I was able to confirm that, in Intrepid, the
touchpad allows for coordinates from 0,0 to 1439,899. I was also able to
confirm that, in Jaunty, it only allows for coordinates up to 1023,767
(representing the bottom-right corner of the screen). This indicates
that there is a problem with the resolution that the touchpad is being
set up to register.

I also tried copying the relevant .fdi file from the LiveUSB version of
Intrepid over to Jaunty - no good. Same problem, the only change was the
ID given to the touchpad for xinput purposes. The only other hint is
that, in Intrepid, the "max_value" values for the touchpad are set to -1
for both axes, but they're set to 1023 and 767 in Jaunty.

Problem is, for all my searching, I can't find a place, anywhere, to
change the "max_value" numbers for each axis of the touchpad, so as a
result I can't get the touchpad to correct itself to the appropriate
"resolution". I can only think that either there's a mistake making the
driver incorrectly detect the resolution, or someone forgot to document
an added functionality making the resolution a manual input rather than
automatically detected. Other mentions I've seen of this issue around
the net (only a few instances) all seem to indicate the "max_value"s are
set to 1023 and 767.

-- 
mouse pointer no longer has 1 pixel precision
https://bugs.launchpad.net/bugs/327428
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