[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Addition to bug info: Without a fix, users cannot reliably use a rotated touchscreen. Without fix users unable to use serveral screens one or more of which are touchscreens, on systems or drivers which do not support separate coordinate systems for each physical screen, e.g. ATI FireGL or NVIDIA adapters with two or more displays attached to single adapter, because that requires set a scaling+transition CTM. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
@Cris: probably because of it's not clear in which order they will be applied if matrix also used. Can you suggest link to distro which got it included, I need test it aap, as I have important project hanging which incdues about hundred devices with multiple screens and touchscreens. Was fighting issue about year and a half and is near to deadline.. Personally I think that matrix should be internal thing.. As settings we should have visual parameters for matrix calculation, origin point, minx, maxx, miny, maxy, rotation angle. TransformationMatrix isn't even documented properly that it may also rotate and invert axes, heh, info in man is very.. lacking. Had to look into vector math books, at least I had proper education to know that such thing exist (I'm not IT by education, I'm engineer\industrial machinery designer). Normal user or average IT? They wouldn't know. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I think this bug is correlating with this: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1085031 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I'm using latest Ubuntu 12.10 and still have the CTM problem (cursor jumps to 0,0 or 0,y or x,0 coordinates, making my work in MyPaint really, really hard). :( Was the patch not accepted or sth? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
The solution for the CTM problem (which is what causes the wacky cursor jumping) is this patch, which was accepted into upstream on 19 Nov 2012; it is not yet in precise-proposed, but I was able to rebuild xorg- server-1.13.0 (from 12.10) with this patch and the problem went away: http://www.mail-archive.com/xorg-devel@lists.x.org/msg33742.html There is another version of the patch floating around somewhere if you want to fix 12.04. IMHO, there is no good reason to break evdev's swap and invert properties, though. For the simple rotation case, they seem like the obvious right thing to use. Why should they not work? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Oops, sorry, I mean quantal-proposed. (Though of course it's not in precise-proposed, either.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Please see https://bugs.launchpad.net/ubuntu/+source/xorg- server/+bug/1005321 for how I solved the cursor jumping issue on 12.04. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Help. I am having this exact same issue as well. I am using 12.04 with all updates to today, but no joy. Can anybody tell me what I can do to make this work again? Is there a patch which actually works? Can I use older code or code from another source which still has Swap Axes working. Please any help would be very much appreciated. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I would like to second the above statements about the bug still being present in (L)Ubuntu 12.04 with Xorg-Server 2:1.11.4. I am using a eGalax Inc. USB TouchController like Jon Szymaniak. So I had a script calling xinput to set-props 'Evdev Axis Inversion' as well as 'Coordinate Transformation Matrix'. However, even without the axis inversion, the pointer erratically jumps around the location pressed. So it definitively seems to be an issue with applying the transformation matrix. Using the combined xinput set-props 'EvdevAxis Inversion' 1 0 and 'Option Calibration 105 1927 190 1857' in xorg.conf.d/99.conf however gives me a decently calibrated, working touch screen without the flickering pointer. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I confirm this bug is present in 12.04. And I see this bug is also not fixed upstream (there are opened bugs about this in freedesktop.org). What exactly have been fixed? If there is a patch, it would be nice to send it upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
This issue is present on 12.04. Has the fix been applied to Precise's Xorg package? (I can't find it in http://changelogs.ubuntu.com/changelogs/pool/main/x/xorg/xorg_7.6+12ubuntu1/changelog) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Tags added: testcase -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I suspect this bugfix to affect the PAD device on the Wacom Intuos4. When I touch any button or the scrollwheel on said device, the cusor goes to 0/0 (x/y). Tested with current oneiric, but I suppose it affects natty too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Tags added: verification-failed ** Tags removed: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Quick Update: I think I'm a bit confused about this -- from what I understand, the evdev SwapAxes option has been deprecated in favor of the coordinate transform matrix. I was interpreting to mean that in my xorg.conf.d script, I could still set the SwapAxes in my xorg.conf.d script, and the coordinate transformation matrix would be now be used under the hood. Below is what I was using: /usr/share/X11/xorg.conf.d/99-calibration.conf: Section InputClass Identifier calibration MatchProduct eGalax Option Calibration 76 1895 129 1852 Option SwapAxes 1 EndSection The above configuration is what still causes the erratic movement. However, I found that to setting SwapAxes to 0 and using xinput to set the devices coordinate transform matrix to [ 0 1 0; 1 0 0; 0 0 1] swapped the axes without the erratic movement, but definitely requires further calibration. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Hi there. I've got a touchscreen here with an eGalax Inc. USB TouchController, which requires an axes swap. After switching to 11.04 I began experiencing the symptoms described in the original bug report -- the pointer would jump between a desired coordinate (x,y) to (x,0) or (0,y). After applying the xorg-server 2:1.10.1-1ubuntu1.1 update, I'm still experiencing this jumping cursor functionality when the evdev axes swap option is enabled. I'm not entirely sure what additional information would be useful to provide -- please let me know and I'll dig up whatever is necessary to debug this. Thanks! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
After I installed this update on my system, the pointer is behaving really weird and accuracy have dropped. Every pointer movement have become oversensitive and erratic . How can i downgrade to earlier xorg- server? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Should I use force version from Synaptic package manager? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
This bug was fixed in the package xorg-server - 2:1.10.1-1ubuntu1.1 --- xorg-server (2:1.10.1-1ubuntu1.1) natty-proposed; urgency=low [ Chase Douglas ] * Fix masked transformed valuator handling (LP: #774938) - Added debian/patches/503_fix_masked_transformed_valuators.patch [ Timo Aaltonen ] * Add 218_randr-check-rotated-virtual-size-limits-correctly.diff - Fix rotation with nvidia driver. (LP: #740933) -- Timo Aaltonen tjaal...@ubuntu.com Wed, 18 May 2011 20:23:56 +0300 ** Changed in: xorg-server (Ubuntu Natty) Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
I can also confirm that the patch works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Bug reproduced on a Dell Latitude XT2 and fix verified with no apparent regression in regular use testing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Tags added: verification-done ** Tags removed: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
Accepted xorg-server into natty-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance! ** Also affects: xorg-server (Ubuntu Natty) Importance: Undecided Status: New ** Changed in: xorg-server (Ubuntu Natty) Status: New = Fix Committed ** Tags added: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Branch linked: lp:ubuntu/natty-proposed/xorg-server -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Description changed: SRU Justification: == In previous releases of xserver-xorg-input-evdev there was an option to invert and/or swap axes. This allowed for simple screen rotation support. In the latest version of the module in Ubuntu, this option has been deprecated in favor of the server-side input coordinate transformation matrix support. See https://wiki.ubuntu.com/X/InputCoordinateTransformation for details. Unfortunately, the XInput 2.1 changes caused the input coordinate transformation matrix support to cause erratic pointer behavior. Without a fix, users cannot reliably use a rotated touchscreen. The fix involves maintaining and using the proper previous states of the X and Y event coordinates when performing the input coordinate transformation. If one coordinate is updated but not the other, the other's previous untransformed coordinate must be used to compute the correct new transformed coordinates. Then, the new transformed coordinates must be compared to the previous transformed coordinates to see if they should be reported to the client. Unchanged values are not reported in some XI 1.x and 2.x events. The current X server conflates the previous untransformed and previous transformed values and ends up calculating the new transformed values incorrectly. - To reproduce, use xinput to set a new coordinate transformation matrix - with a rotation. For example, use a 90 degree turn by setting the input - coordinate transformation matrix to 0 -1 1 1 0 0 0 0 1. See the above - wiki page for details on how to set the matrix. Then, try to touch the - touchscreen and move the cursor. The cursor will jump arround - erratically when moving in pure horizontal or pure vertical motions. + TEST CASE: + To reproduce, use xinput to set a new coordinate transformation matrix with a rotation. For example, use a 90 degree turn by setting the input coordinate transformation matrix to 0 -1 1 1 0 0 0 0 1. See the above wiki page for details on how to set the matrix. Then, try to touch the touchscreen and move the cursor. The cursor will jump arround erratically when moving in pure horizontal or pure vertical motions. The risk of regression is minimal because the only time the fix will cause a change is when the transformation matrix has been modified from the identity matrix to a matrix including some amount of rotation. The patch was also tested in the xorg-edgers ppa for a few weeks before it was even uploaded to Oneiric. Original Bug Report: When using something like `xinput set-float-prop $INPUTDEV Coordinate Transformation Matrix 0.0 -1.0 1.0 1.0 0.0 0.0 0.0 0.0 1.0` to match the coordinates of a touchscreen/tablet to a rotated (transformed) screen, the cursor moves around erratically. From the original report of david-dklevine (https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/742567/comments/32): when a horizontal or vertical drag is performed the cursor jumps wildly - it appears to jump between what it should be according to the coordinate transformation and what it would be if x=0 and y=1 (that is if the second line of the matrix was the identity). With a diagonal drag or a touch the cursor appears where it should be. In addition to the Cando Multi Touch Panel reported at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input- evdev/+bug/742567/comments/32, it also affects me with a AsusTek, Inc. MultiTouch(TTI) (on Asus EeePC T101MT) lsb_release -rd Description: Ubuntu 11.04 Release: 11.04 $ apt-cache policy xserver-xorg-input-evdev xserver-xorg-input-evdev: Installed: 1:2.6.0-1ubuntu12 Candidate: 1:2.6.0-1ubuntu12 Version table: *** 1:2.6.0-1ubuntu12 0 500 http://gd.tuwien.ac.at/opsys/linux/ubuntu/archive/ natty/main amd64 Packages 100 /var/lib/dpkg/status -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Tags added: edgers -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
This bug was fixed in the package xorg-server - 2:1.10.1-1ubuntu2 --- xorg-server (2:1.10.1-1ubuntu2) oneiric; urgency=low * Fix masked transformed valuator handling (LP: #774938) - Added debian/patches/503_fix_masked_transformed_valuators.patch -- Bryce Harrington br...@ubuntu.com Tue, 17 May 2011 14:44:58 -0700 ** Changed in: xorg-server (Ubuntu) Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Changed in: xserver-xorg-input-evdev (Ubuntu) Status: New = In Progress ** Changed in: xserver-xorg-input-evdev (Ubuntu) Importance: Undecided = Medium ** Changed in: xserver-xorg-input-evdev (Ubuntu) Assignee: (unassigned) = Chase Douglas (chasedouglas) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Changed in: xserver-xorg-input-evdev (Ubuntu) Status: In Progress = Fix Committed ** Package changed: xserver-xorg-input-evdev (Ubuntu) = xorg-server (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 774938] Re: Erratic cursor movement when using Coordinate Transformation Matrix
** Description changed: - Binary package hint: xserver-xorg-input-evdev + SRU Justification: + == + In previous releases of xserver-xorg-input-evdev there was an option to invert and/or swap axes. This allowed for simple screen rotation support. In the latest version of the module in Ubuntu, this option has been deprecated in favor of the server-side input coordinate transformation matrix support. See https://wiki.ubuntu.com/X/InputCoordinateTransformation for details. Unfortunately, the XInput 2.1 changes caused the input coordinate transformation matrix support to cause erratic pointer behavior. Without a fix, users cannot reliably use a rotated touchscreen. + + The fix involves maintaining and using the proper previous states of the + X and Y event coordinates when performing the input coordinate + transformation. If one coordinate is updated but not the other, the + other's previous untransformed coordinate must be used to compute the + correct new transformed coordinates. Then, the new transformed + coordinates must be compared to the previous transformed coordinates to + see if they should be reported to the client. Unchanged values are not + reported in some XI 1.x and 2.x events. The current X server conflates + the previous untransformed and previous transformed values and ends up + calculating the new transformed values incorrectly. + + To reproduce, use xinput to set a new coordinate transformation matrix + with a rotation. For example, use a 90 degree turn by setting the input + coordinate transformation matrix to 0 -1 1 1 0 0 0 0 1. See the above + wiki page for details on how to set the matrix. Then, try to touch the + touchscreen and move the cursor. The cursor will jump arround + erratically when moving in pure horizontal or pure vertical motions. + + The risk of regression is minimal because the only time the fix will + cause a change is when the transformation matrix has been modified from + the identity matrix to a matrix including some amount of rotation. The + patch was also tested in the xorg-edgers ppa for a few weeks before it + was even uploaded to Oneiric. + + Original Bug Report: + When using something like `xinput set-float-prop $INPUTDEV Coordinate Transformation Matrix 0.0 -1.0 1.0 1.0 0.0 0.0 0.0 0.0 1.0` to match the coordinates of a touchscreen/tablet to a rotated (transformed) screen, the cursor moves around erratically. From the original report of david-dklevine (https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/742567/comments/32): when a horizontal or vertical drag is performed the cursor jumps wildly - it appears to jump between what it should be according to the coordinate transformation and what it would be if x=0 and y=1 (that is if the second line of the matrix was the identity). With a diagonal drag or a touch the cursor appears where it should be. In addition to the Cando Multi Touch Panel reported at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input- evdev/+bug/742567/comments/32, it also affects me with a AsusTek, Inc. MultiTouch(TTI) (on Asus EeePC T101MT) lsb_release -rd Description: Ubuntu 11.04 Release: 11.04 $ apt-cache policy xserver-xorg-input-evdev xserver-xorg-input-evdev: - Installed: 1:2.6.0-1ubuntu12 - Candidate: 1:2.6.0-1ubuntu12 - Version table: - *** 1:2.6.0-1ubuntu12 0 - 500 http://gd.tuwien.ac.at/opsys/linux/ubuntu/archive/ natty/main amd64 Packages - 100 /var/lib/dpkg/status + Installed: 1:2.6.0-1ubuntu12 + Candidate: 1:2.6.0-1ubuntu12 + Version table: + *** 1:2.6.0-1ubuntu12 0 + 500 http://gd.tuwien.ac.at/opsys/linux/ubuntu/archive/ natty/main amd64 Packages + 100 /var/lib/dpkg/status ** Patch added: 503_fix_masked_transformed_valuators.patch https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/774938/+attachment/2131372/+files/503_fix_masked_transformed_valuators.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774938 Title: Erratic cursor movement when using Coordinate Transformation Matrix -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
