Looks I'm getting same eefect with newest releases of Ubuntu and evdev drivers
(tried alot of combos,throughout 2012 year).
Simply, using transformation matrix with evdev driver wich inverts, scales or
shift coordinates causes either jumping to border of screen or jitter when
touch
On the documentation front, I'd also have to mention that the
xinput_calibrator still sets the Swap Axes property if you have a device
that needs them to be swapped.
I have an eGalax touchscreen (0xeef:0001) with swapped axes that also
happens to not always send the valuators for both axes
If you look at the second video very carefully you can see that the
cursor does not jump to the corner when the selection expands.
What probably happens is that the application that does the background
selection does not handle XInput valuators properly. An extremely
similar bug was fixed in Qt
It's not just Xfce, it's the same behaviour in Gnome (Classic/Fallback,
gfx chip of the embedded computer used is too weak for Unity) and
Openbox with any program (no matter whether desktop, Firefox, Chromium,
xev…).
However, I just noticed that the bug *only* occurs if the evdev axes swap is
It seems that in static EvdevProcessValuators the x and y coordinates
are flipped and the result written back in the valuators. I could not
fully decipher what the code is doing but attached is a patch which at
least roughly shows where I think the problem is.
Chase, any comments on this?
**
The attachment reorganize_valuator_masks.patch of this bug report has
been identified as being a patch. The ubuntu-reviewers team has been
subscribed to the bug report so that they can review the patch. In the
event that this is in fact not a patch you can resolve this situation by
removing the
Samuel,
The evdev swap axes property has been deprecated since Natty. We are
aware of issues with swap axes and the new masked valuators, but we
don't have plans to resolve them.
There is a much more robust solution in the form of the Input
Transformation Matrix property. It allows for any 2D
Jussi,
I don't think unsetting the valuator is necessary. The mask is zero'd on
every evdev sync event, and only new values are set. I think this is
really due to the axis swapping property being set. See my next comment
:).
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The evdev swap axes property has been deprecated since Natty.
I'd suggest putting that warning into the Xorg log (if the option is detected)
and the manpage, I'm pretty sure that other users will have similar problems.
There is a much more robust solution in the form of the Input
When I play back the recording, the behaviour is the following (on both
natty and oneiric):
A swipe from bottom to top. Then it stands still for a while and jitters
a bit within a radius of ̃~5 pixels.
A second swipe from bottom to top. Then jitter as above.
After this the cursor jumps around
I never even came near the screen borders. This is what happens when I replay
the record:
http://up.tao.at/download/e66a9a1d8828a299ca41fea9272a38f4/MVI_0823.mkv
For reference, what happens if you tap/swipe:
http://up.tao.at/download/9748d6fb8231d96633ae160a8d0d4ceb/MVI_0824.mkv
What should
Btw.: Tested with vanilla xorg 10.4 under Arch Linux: No cursor jumps,
no flickering. Seems to be really related to your custom patches.
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https://bugs.launchpad.net/bugs/832624
Title:
evemu report showing broken valuators. Note that I never even came close
to the screen borders while tapping/wiping, yet the cursor regularly
jumped to the edges.
** Attachment added: evemu-report.tar.gz
re from vacation. Apparently, the hard disk with my developing
environment is currently missing/stolen, so it might take some time to
get back on testing.
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** Changed in: xorg-server (Ubuntu)
Importance: Undecided = Medium
** Changed in: unity-foundations
Importance: Undecided = Medium
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Title:
** Changed in: unity-foundations
Milestone: oneiric-beta-2 = oneiric-final
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Title:
cursor jumping to screen border
To manage notifications
** Changed in: unity-foundations
Milestone: oneiric-backlog = oneiric-beta-2
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Title:
cursor jumping to screen border
To manage notifications
** Also affects: unity-foundations
Importance: Undecided
Status: New
** Changed in: unity-foundations
Milestone: None = oneiric-backlog
** Changed in: unity-foundations
Assignee: (unassigned) = Chase Douglas (chasedouglas)
** Changed in: unity-foundations
Status: New =
We can't really debug this issue without a device recording, so I'm
moving this to incomplete.
** Changed in: xorg-server (Ubuntu)
Status: Triaged = Incomplete
** Changed in: unity-foundations
Status: Triaged = Incomplete
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Timo,
Please generate device recordings by following the instructions at
https://wiki.ubuntu.com/Multitouch/Testing/uTouchEvEmu#Debugging. Then
attach the device.record and device.prop file to the bug.
Thanks!
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https://bugs.launchpad.net/bugs/832624
Title:
cursor jumping to screen border
To manage notifications about this bug go to:
Ok, something still missing what makes a touchscreen behave like wacoms
used to.
** Package changed: xorg (Ubuntu) = xorg-server (Ubuntu)
** Changed in: xorg-server (Ubuntu)
Status: New = Triaged
** Changed in: xorg-server (Ubuntu)
Assignee: (unassigned) = Chase Douglas
Looks like we're missing one commit which is in the 1.10.x series. I'll
push a new version to test.
** Changed in: xorg-server (Ubuntu)
Status: Triaged = In Progress
** Changed in: xorg-server (Ubuntu)
Assignee: Chase Douglas (chasedouglas) = Timo Aaltonen (tjaalton)
--
You
Actually, that same code is modified by our multitouch patch, so I think
that particular commit (02d77caa36e430909a) doesn't apply here, and this
is a new issue altogether?
** Changed in: xorg-server (Ubuntu)
Assignee: Timo Aaltonen (tjaalton) = Chase Douglas (chasedouglas)
** Changed in:
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