[Bug 563100] Re: Mouse movement corrupted with Xinerama enabled

[William King]

I am interested in becoming more involved in the process. I will read
into what you posted, and will try to find another bug that I can
reproduce.

On 06/15/2010 11:04 AM, Mackenzie Morgan wrote:
> For bugs in stable releases:
> https://wiki.ubuntu.com/StableReleaseUpdates
>
> Bugs in general:
> For plain old patches that are not upstream yet, subscribe ubuntu-reviewers 
> and add the patch tag (if the patch had been actually attached to the bug and 
> marked as a patch rather than just linked, this would have been automatic).  
> That team will review the patch and send it upstream.  If it's urgent (ie, 
> can't wait for a new upstream release and just go into a future version of 
> Ubuntu), someone on that team will find someone to make a debdiff (or do it 
> themself).  
>
> For debdiffs or already-upstream patches, subscribe ubuntu-sponsors.
>
> Of course, if the person in the Reviews team who comes across the bug has 
> upload rights, they can push things through pretty quickly.  I don't have 
> upload rights for main, so while I could do the debdiff and put packages in my 
> PPA to get the fix confirmed by all you folks, I still needed to point Alberto 
> over here and ask him to sponsor it.
>
> If you'd like to help move such things through faster in future, learning to 
> make debdiffs and upload test packages to a PPA would be helpful.  Having your 
> packages tested & confirmed helps make an easier case to the SRU team.
>
> PS:  there is an effort to get all patches currently attached to bug reports on 
> Launchpad reviewed (sent upstream if good, rejected with explanation of what's 
> wrong if bad, forwarded to sponsors if upstream) by the time 10.10 is 
> released.  That's Operation Cleansweep (  
> https://wiki.ubuntu.com/OperationCleansweep ) and your help would be greatly 
> appreciated :)
>
>

-- 
Mouse movement corrupted with Xinerama enabled
https://bugs.launchpad.net/bugs/563100
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Status in X.Org X server: Unknown
Status in “xorg-server” package in Ubuntu: In Progress

Bug description:
Impact:  mouse movements are incorrect when a display is placed to the left of or above the "primary" display (negative coordinates in use)
How the bug is addressed: revert to having signed ints representing coordinates on screens so that negative coordinates can be properly used
Patch: http://bugs.freedesktop.org/attachment.cgi?id=35383
Testcase: see original report
Regression potential:  no obvious regression potential

=== Original report  ===

Binary package hint: xorg

The mouse is unusable on a second monitor using the nvidia drivers and Xinerama (Installed: 2:1.1-2).  Upon moving to the second screen, the mouse cursor movement is erratic (although it does respond vaguely to physical mouse movement).

The problem was introduced with lucid (and continues in beta 2).  The mouse works as expected on the second screen in both intrepid and karmic with exact same xorg.conf and nvidia drivers.

The problem appears even with only the minimal settings in xorg.conf to enable dual monitors.  The problem appears whether the second monitor is rotated or not rotated.  The problem does not occur with nvidia's TwinView implementation.

The mouse and all other aspects of X work fine in lucid *without* Xinerama enabled.  Enabling Xinerama causes no problems except this one.  The bug is not present in Debian unstable.

The new bug of course forces one to use separate X servers when wishing to rotate only one monitor in a set -- a limitation that was not present in prior releases of Ubuntu or other distributions.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-20.30-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-20-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Apr 14 09:15:52 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406)
MachineType: Gigabyte Technology Co., Ltd. EP45-UD3P
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-20-generic root=/dev/mapper/vg0-root ro
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
Xrandr:
 Error: command ['xrandr', '--verbose'] failed with exit code 1: Xlib:  extension "RANDR" missing on display ":0.1".
 RandR extension missing
dmi.bios.date: 04/16/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F9
dmi.board.name: EP45-UD3P
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF9:bd04/16/2009:svnGigabyteTechnologyCo.,Ltd.:pnEP45-UD3P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnEP45-UD3P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: EP45-UD3P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       x86_64
 kernel:             2.6.32-20-generic